eng
Iranian Institute of Research and Development in Chemical Industries (IRDCI)-ACECR
Iranian Journal of Chemistry and Chemical Engineering
1021-9986
2020-04-01
39
2
1
10
10.30492/ijcce.2020.33683
33683
Facile Synthesis and Electrochemical Performance of Graphene-Modified Cu2O Nanocomposite for Use in Enzyme-Free Glucose Biosensor
Faranak Foroughi
f.forooghi.material@gmail.com
1
Mansour Rahsepar
mansour.rahsepar@gmail.com
2
Mohammad Jafar Hadianfard
hadianfa@shirazu.ac.ir
3
Hasuck Kim
hasuckim@snu.ac.kr
4
Department of Materials Science and Engineering, School of Engineering, Shiraz University, Shiraz 7134851154, I.R. IRAN
Department of Materials Science and Engineering, School of Engineering, Shiraz University, Shiraz 7134851154, I.R. IRAN
Department of Materials Science and Engineering, School of Engineering, Shiraz University, Shiraz 7134851154, I.R. IRAN
Department of Chemistry, Seoul National University, Seoul, KOREA
Graphene-modified Cu2O nanocomposite was synthesized under facile microwave irradiation of an aqueous solution and has been investigated as an enzyme-free glucose biosensor. Morphology and crystal structure of the graphene-modified Cu2O nanocomposite were investigated by using electron microscopy and X-Ray Diffraction (XRD) analyses. Also, the electrochemical performance of the graphene-modified Cu2O nanocomposite for the measurement of glucose concentration in alkaline media was evaluated by using cyclic voltammetry and chronoamperometric measurements. The electrochemical studies revealed that the graphene-modified nanocomposite electrode exhibited a high performance for non-enzymatic oxidation of glucose with a desirable sensitivity. Also, the fabricated graphene-modified biosensor exhibited a wide linear response for glucose detection in the concentrations ranges from 2 µM to 12 mM and a desirable detection limit of 2 µM. Also, the graphene-modified Cu2O nanocomposite provided an appropriate selective response for glucose detection in the presence of high concentrations of ascorbic acid and dopamine.
https://ijcce.ac.ir/article_33683_d35d87531c455c1ef8e7b052cf58b650.pdf
Electrochemical biosensor
non-enzymatic sensors
Graphene
Cu2O
Glucose
eng
Iranian Institute of Research and Development in Chemical Industries (IRDCI)-ACECR
Iranian Journal of Chemistry and Chemical Engineering
1021-9986
2020-04-01
39
2
11
19
10.30492/ijcce.2020.33339
33339
Synthesis and Characterization of Ni0.5Cu0.5Cr2O4 Nanostructure for Discoloration of Aniline Dye under Visible Light from Wastewater
Fatemeh Soleimani
fatemeh_soleimani68@yahoo.com
1
Mehdi Salehi
msalehi@semnan.ac.ir
2
Ahmad Gholizadeh
gholizadeh@du.ac.ir
3
Department of Chemistry, Semnan University, Semnan 35351-19111, I.R. IRAN
Department of Chemistry, Semnan University, Semnan 35351-19111, I.R. IRAN
School of Physics, Damghan University (DU), Damghan, I.R. IRAN
In this research, pure-phased Ni0.5Cu0.5Cr2O4 synthesis via solid-state method successfully. In the other part, the photocatalytic activity of synthesized Ni0.5Cu0.5Cr2O4 was investigated in various aspects by using Malachite green as a pollutant and compared with the number of previous photocatalysts. The Photocatalysis process is a promising technique for solving many current environmental and energy issues. The environmental pollutant, especially water contaminates, can influence human health, animals, and the ecosystem. Dye as one of the most important pollutants has investigated in this study. In this study, purification and crystal structure of material have been determined by X-Ray powder Diffraction (XRD) method. The results showed that the synthesized Ni0.5Cu0.5Cr2O4 was crystallized in tetragonal structure with space group I 41/AMD. The morphology of obtained materials was modified by Field Emission Scanning Electron Microscope (FESEM). Also, the material was characterized by Fourier-Transform InfraRed (FT-IR) spectroscopy and Thermo Gravimetric Analysis (TGA).
https://ijcce.ac.ir/article_33339_773681b51a467429ac5283bcffb981e1.pdf
Ni0.5Cu0.5Cr2O4
photocatalytic activity
Solid-state
Malachite green
eng
Iranian Institute of Research and Development in Chemical Industries (IRDCI)-ACECR
Iranian Journal of Chemistry and Chemical Engineering
1021-9986
2020-04-01
39
2
21
31
10.30492/ijcce.2020.34794
34794
Cu-phthalocyanine Coated Hybrid Magnetic Nanoparticles: Preparation and Application in the Synthesis of Mono- and Bis pyrano[2,3-d]pyrimidinones and mono- and Bis-2-amino-4H-pyrans
Ali Reza Karimi
ar_karimi55@yahoo.com
1
Fatemeh Bagherian
f.bagheriyan@yahoo.com
2
Marzie Karimi
karimi.m.59@gmail.com
3
Department of Chemistry, Faculty of Science, Arak University, P.O. Box 38156-8-8349 Arak, I.R. IRAN
Department of Chemistry, Faculty of Science, Arak University, P.O. Box 38156-8-8349 Arak, I.R. IRAN
Department of Chemistry, Faculty of Science, Arak University, P.O. Box 38156-8-8349 Arak, I.R. IRAN
In this research, Cu-phthalocyanine coated hybrid magnetic nanoparticles have been prepared in a simple method and evaluated as an efficient catalyst in the preparation of mono- and bis-pyrano[2,3-d]pyrimidinones and mono- and bis-2-amino-4H-pyrans from the condensation reaction of 1,3-dimethylbarbituric acid or 4-hydroxycumarin with malononitrile and mono- and bis-aldehydes under ultrasonic irradiation. The catalyst could be easily recovered in the presence of the external magnetic field and reused five times without significant loss of activity and mass. The magnetic nanoparticles were characterized using Fourier Transform InfraRed (FT-IR) spectra, X-Ray Diffraction (XRD) spectroscopy, Scanning Electron Microscopy (SEM), Thermal Gravimetric Analysis (TGA). The results showed the spherical structures of hybrid magnetic nanoparticles and the average size is about 37 nm.
https://ijcce.ac.ir/article_34794_97f6e1b79138a6414b8981feb3560aff.pdf
Hybrid magnetic nanoparticles
Phthalocyanine
Pyrano[2,3-d]pyrimidinone
2-Amino-4H-pyran
ultrasonic irradiation
eng
Iranian Institute of Research and Development in Chemical Industries (IRDCI)-ACECR
Iranian Journal of Chemistry and Chemical Engineering
1021-9986
2020-04-01
39
2
33
47
10.30492/ijcce.2020.37780
37780
Polyester/SiO2 Nanocomposites: Gas Permeation, Mechanical, Thermal and Morphological Study of Membranes
Hashem Ahmadizadegan
h.ahmadizadegan.2005@gmail.com
1
Department of Chemistry, Darab Branch, Islamic Azad University, 7481783143-196, Darab, I.R. IRAN
Using of nanocomposite membranes composed of polymer and inorganic nanoparticles is a novel method to enhance gas separation performance. In this study, membranes were fabricated from polyester (PE) containing silica (SiO2) nanoparticles and gas permeation properties of the resulting membranes were investigated. Morphology of the membranes, SiO2 distribution and aggregates were observed by Scanning Electron Microscopy (SEM) and Transmission Electron Microscopy (TEM) analysis. Furthermore, thermal stability, the residual solvent in the membrane film, and structural ruination of membranes were analyzed by Thermo Gravimetric Analysis (TGA). The effects of SiO2 nanoparticles on the glass transition temperature (Tg) of the prepared nanocomposites were studied by Differential Scanning Calorimetry (DSC). The results obtained from gas permeation experiments with a constant pressure setup showed that adding SiO2 nanoparticles to the polymeric membrane structure increased the permeability of the membranes.
https://ijcce.ac.ir/article_37780_e355d567f7beec88b9acbf84ee437dcd.pdf
polyester
Nanocomposite
silica
thermal stability
Gas permeation
eng
Iranian Institute of Research and Development in Chemical Industries (IRDCI)-ACECR
Iranian Journal of Chemistry and Chemical Engineering
1021-9986
2020-04-01
39
2
49
58
10.30492/ijcce.2020.34296
34296
Structural, Optical and Magnetic Feature of Core-Shell Nanostructured Fe3O4@GO in Photocatalytic Activity
Amir Abharya
abharya.a@gmail.com
1
Ahmad Gholizadeh
gholizadeh@du.ac.ir
2
School of Physics, Damghan University (DU), Damghan, I.R. Iran
School of Physics, Damghan University (DU), Damghan, I.R. Iran
In this paper, structural, magnetic, optical, and photocatalytic properties of core-shell structure Fe3O4@GO nanoparticles have been compared with Fe3O4 nanoparticles in the degradation of methyl blue and methyl orange. For this purpose, GO nanosheets were wrapped around the APTMS-Fe3O4 nanoparticles and then characterized using X-ray Diffraction, field emission scanning electron microscopy, transmission electron microscopy, vibrating sample magnetometer, UV-visible, and Fourier transform infrared spectroscopy. The results show the core-shell nanostructured Fe3O4@GO is formed. As an application for the synthesized structure, degradation of methyl blue and methyl orange as heavy-mass organic pollutants has been measured. While the saturation magnetization of Fe3O4@GO is lower than Fe3O4, but shows better efficiency in the degradation of methyl blue and methyl orange. The obtained catalysts can be quickly separated from the solution under an external magnetic field because of their considerable Ms values, which will be beneficial for their reuse and boosting the overall water treatment efficiency in practical applications.
https://ijcce.ac.ir/article_34296_d2846d3e790d3b8c9c20d6107e2ee748.pdf
Graphene oxide
Core-shell structure
Magnetic materials
Degradation of methyl blue and methyl orange
eng
Iranian Institute of Research and Development in Chemical Industries (IRDCI)-ACECR
Iranian Journal of Chemistry and Chemical Engineering
1021-9986
2020-04-01
39
2
59
68
10.30492/ijcce.2020.33964
33964
Polyethylene/Clay/Graphite Nanocomposites as Potential Materials for Preparation of Reinforced Conductive Natural Gas Transfer Pipes
Sariyeh Parmoor
sarparmoor@uut.ac.ir
1
Mohammad Sirousazar
m.sirousazar@uut.ac.ir
2
Farshad Kheiri
farkheiri@uut.ac.ir
3
Mehrdad Kokabi
mehrir@modares.ac.ir
4
Faculty of Chemical Engineering, Urmia University of Technology, Urmia, I.R. IRAN
Faculty of Chemical Engineering, Urmia University of Technology, Urmia, I.R. IRAN
Faculty of Chemical Engineering, Urmia University of Technology, Urmia, I.R. IRAN
Polymer Engineering Department, Faculty of Chemical Engineering, Tarbiat Modares University, Tehran, I.R. IRAN
A series of high-density polyethylene/Cloisite 20A/graphite nanocomposites were prepared via melt blending for the production of polymeric pipes for natural gas transfer. The microstructural, mechanical, thermal, electrical and barrier properties of prepared nanocomposites were investigated. An intercalated morphology was observed for prepared nanocomposites. Improved mechanical properties e.g. over 148 % increase in Young’s modulus were observed by incorporating the nanoparticles into the polyethylene matrix. The thermal analysis showed that the melting point of polyethylene was slightly increased by incorporating both fillers, i.e. Cloisite 20A and graphite in it, and the crystallinity was depended on the type of filler. The results showed that the MFI values decreased by incorporating the fillers into the polyethylene matrix and further decreases were observed by increasing the contents of the filler. It was also found that a considerable amount of electrical conductivity is created in graphite loaded nanocomposites. The natural gas permeability investigations revealed of more than 51 % decrease in the permeability by incorporating 5 wt.% of Cloisite 20A to the polyethylene. It was concluded that the prepared nanocomposites due to their enhanced mechanical, thermal and barrier properties along with the conductive nature are excellent materials to be used in the production of polymeric pipes in natural gas distribution and transportation networks.
https://ijcce.ac.ir/article_33964_3b631997dd43ac25c0152aaa1b422add.pdf
Nanocomposites
Polyethylene
Clay
Graphite
Natural gas pipeline
eng
Iranian Institute of Research and Development in Chemical Industries (IRDCI)-ACECR
Iranian Journal of Chemistry and Chemical Engineering
1021-9986
2020-04-01
39
2
69
81
10.30492/ijcce.2020.37197
37197
Enhanced HDN Performance of Al, Zr and Ti Modified NiW Catalysts by Using Co-Impregnation Method
Fang Guo
guofang110119@163.com
1
Yi-en Du
duyien124@163.com
2
Xianjun Niu
xjniu1984@163.com
3
Shaoqing Guo
guosq@sxicc.ac.cn
4
Xianxian Wei
weixianxian@tyust.edu.cn
5
Xiaoxiao Wang
wang5203264@sina.com
6
Zegang Qiu
qiuzegang@sxicc.ac.cn
7
Liangfu Zhao
lfzhao@sxicc.ac.cn
8
College of Chemistry and Chemical Engineering, Jinzhong University, Jinzhong 030600, P.R. CHINA
College of Chemistry and Chemical Engineering, Jinzhong University, Jinzhong 030600, P.R. CHINA
College of chemistry and chemical engineering, Jinzhong University, Jinzhong 030600, P.R. CHINA
College of Environment and Safety, Taiyuan University of Science and Technology, Taiyuan 030024, P.R. CHINA
College of Environment and Safety, Taiyuan University of Science and Technology, Taiyuan 030024, P.R. CHINA
College of Environment and Safety, Taiyuan University of Science and Technology, Taiyuan 030024, P.R. CHINA
College of chemistry and chemical engineering, Xi’an University of Petroleum, Xi’an 710065, P.R. CHINA
Laboratory of Applied Catalysis and Green Chemical Engineering, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, P.R. CHINA
The Al, Zr, and Ti modified MCM-41 materials were prepared by the post-synthesis method, and then the Ni-W species were introduced on them by using the co-impregnation method in order to obtain high-performance hydrodenitrogenation (HDN) catalysts. The activity of the catalysts was evaluated by the HDN reaction of quinoline. The optimum HDN activity was observed on the catalyst supported on the Al modified MCM-41. The high performance of the NiW/Al catalyst was due to the higher dispersion of Ni, W species, the more density of acid sites, the more appropriate nature of W species, and the lower reduction temperature of W species. Moreover, the catalysts prepared by co-impregnation method showed better performance than the catalysts prepared by the sequential impregnation method in the HDN of quinoline.
https://ijcce.ac.ir/article_37197_92da17958fbe9ef91eef1a61fe28f166.pdf
Al, Zr, Ti modified MCM-41
NiW catalyst
Co-impregnation
Hydrodenitrogenation
eng
Iranian Institute of Research and Development in Chemical Industries (IRDCI)-ACECR
Iranian Journal of Chemistry and Chemical Engineering
1021-9986
2020-04-01
39
2
83
90
10.30492/ijcce.2020.37216
37216
The Conversion Kinetics of Tincal to Boric Acid in Nitric Acid Solutions
Mehmet Tunc
m.tunc@yyu.edu.tr
1
Hasan irem
hirem@yyu.edu.tr
2
M. Muhtar Kocakerim
mkkocakerim@yahoo.com.tr
3
Mehmet Copur
mehmet.copur@btu.edu.tr
4
Özkan Küçük
okucuk74@hotmail.com
5
Department of Chemistry, Yüzüncüyıl University, Van, TURKEY
Department of Chemistry, Yüzüncüyıl University, Van, TURKEY
Department of Chemical Engineering, Engineering Faculty, Çankırı Karatekin University, Çankırı, TURKEY
Department of Chemical Engineering, Engineering Faculty, Bursa Teknik University, Bursa, TURKEY
Department of Metallurgy and Material Engineering, Engineering Faculty, Bilecik Şeyh Edebali University, TURKEY
Pure borax and various boron compounds are produced from the solutions in which tincal is dissolved with various reagents. Economically important boron compounds such as boric acid, borax, boric oxide, and refined hydrated sodium borates and perborates are produced from boron-containing ores. The production of boric acid by using nitric acid from tincal is more advantageous because it evaluates by-product NaNO3 as fertilizer production. In this study, the conversion kinetics of tincal to boric acid in nitric acid solutions were investigated by such parameters as particle size, 300-1500 µm; acid concentration,0.5-4 mol/L; solid-to-liquid ratio 0.04-0.10 g/mL; stirring speed 20.93-62.8 s-1, and reaction temperature, 30-60 oC. The conversion was found to increase with decreasing particle size and solid-to-liquid ratio and while it increased with increasing reaction temperature, acid concentration, and stirring speed. The conversion kinetics was examined using the heterogeneous and pseudo-homogeneous reaction models. The experimental results were found to be in better agreement with the correlation given in the following equation and the activation energy being 37.5 kJ/mol.
https://ijcce.ac.ir/article_37216_73eff37baf5e576805505e20bb6c126e.pdf
Borax
conversion kinetics
Nitric acid
boric acid
eng
Iranian Institute of Research and Development in Chemical Industries (IRDCI)-ACECR
Iranian Journal of Chemistry and Chemical Engineering
1021-9986
2020-04-01
39
2
91
103
10.30492/ijcce.2020.33965
33965
Optimization and Prediction of Reaction Parameters of Plastic Pyrolysis oil Production Using Taguchi Method
Gopinath S
gp.nath4@gmail.com
1
Devan P.K..
pkdevan68@gmail.com
2
Department of Mechanical Engineering, R M K College of Engineering and Technology, Puduvoyal, Tamil Nadu, 601206 INDIA
Department of Mechanical Engineering, R M K College of Engineering and Technology, Puduvoyal, Tamil Nadu, 601206 INDIA
Design of Experiments (DoE) is a powerful guiding tool that can help researchers to identify the main variables that affect the performance characteristics. The present paper elaborates on the optimization and prediction of reaction parameters like type of plastic, catalyst, and temperature using Taguchi’s L9 orthogonal array method with three levels and three parameters to obtain the highest yield of plastic oil. To determine the effect of each parameter, the Signal to Noise (S/N) ratio was calculated based on the experiments conducted. In this investigation, contributions of reaction parameters were analyzed by Analysis of Variance (ANOVA) using statistical software Minitab-16. Based on the investigation, the reaction parameters like type of plastic: Low-Density Polyethylene (LDPE), catalyst: Silica alumina (SA), and temperature: 500°C are optimized to get the better yield of oil. Based on the confirmatory trial, the oil yield of about 95.4%, the gas yield of about 3.4%, and solid residue as 1.2% were obtained, which is better than the normal trails.
https://ijcce.ac.ir/article_33965_7552939c5bccd5f3413e51edd94f53fc.pdf
ANOVA
Orthogonal array
Plastic oil
Pyrolysis
Taguchi’s DoE
eng
Iranian Institute of Research and Development in Chemical Industries (IRDCI)-ACECR
Iranian Journal of Chemistry and Chemical Engineering
1021-9986
2020-04-01
39
2
105
111
10.30492/ijcce.2020.33369
33369
Ultrasonic Assisted Synthesis, Characterization and Bioactivity Assessment of Novel Piperonal Based Schiff Base and Its Metal Complexes
Obaid-Ur-Rahman Abid
obaid_chem@yahoo.com
1
Aziz Ahmad
azizvishal@gmail.com
2
Wajid Rehman
sono_waj@yahoo.com
3
Rehmat Zaman
rehmat_zaman@yahoo.com
4
Mohsin Ali
mohsinali2030@gmail.com
5
Sadullah Mir
sadullah@ciit.net.pk
6
Muhammad Qureshi Tauseef
tauseefqureshi@hotmail.com
7
Department of Chemistry, Hazara University Mansehra, PAKISTAN
Department of Chemistry, Hazara University Mansehra, PAKISTAN
Department of Chemistry, Hazara University Mansehra, PAKISTAN
Department of Biochemistry, Hazara University Mansehra, PAKISTAN
Department of Chemistry, Hazara University Mansehra, PAKISTAN
Department of Chemistry, COMSATS Institute of Information Technology, Abbottabad 22060, PAKISTAN
Department of Physics, Hazara University, Mansehra, PAKISTAN
A novel Schiff base was synthesized by the reaction of piperonal and anthranilic acid, which was further utilized in the synthesis of five novel complexes by reaction with different metal salts ultrasonically. Time for the reaction was greatly reduced through ultrasound irradiations and the yield of reactions was also high as compared to the conventional methods using reflux conditions. The synthesized Schiff base and its metal complexes were characterized by spectroscopic techniques like UV-Visible, IR, and 1H NMR. The synthesized compounds were tested for their antibacterial and antioxidant activity. Good results were obtained in the case of antibacterial activities.
https://ijcce.ac.ir/article_33369_4aa25fef443d8e30fcaac77152482155.pdf
Schiff Base
Antibacterial
Anti-oxidant
Anthranilic acid
eng
Iranian Institute of Research and Development in Chemical Industries (IRDCI)-ACECR
Iranian Journal of Chemistry and Chemical Engineering
1021-9986
2020-04-01
39
2
113
122
10.30492/ijcce.2020.33338
33338
Binuclear Nickel(II) Complex Containing 6-Methyl-2,2'-bipyridine and Chloride Ligands: Synthesis, Characterization, Thermal Analyses, and Crystal Structure Determination
Vahid Amani
v_amani2002@yahoo.com
1
Maryam Zakeri
maryam_zakeri@ymail.com
2
Roya Ahmadi
roya_ahmadi_chem@yahoo.com
3
Department of Chemistry, Farhangian University, Tehran, I.R. IRAN
Department of Chemistry, Yadegar-e-Imam Khomeini (RAH) Shahre Rey Branch, Islamic Azad University, Tehran, I.R. IRAN
Department of Chemistry, Yadegar-e-Imam Khomeini (RAH) Shahre Rey Branch, Islamic Azad University, Tehran, I.R. IRAN
A new binuclear complex of [{NiCl(6-mbipy)}2(μ-Cl)2] (1) was prepared from the reaction of NiCl2.6H2O and 6-methyl-2,2'-bipyridine (6-mbipy) in a mixture of methanol and acetonitrile. Suitable crystals of 1 for X-ray diffraction measurement were obtained by slow evaporation of the resulted green solution at room temperature. Complex 1 was characterized by spectral methods (IR, UV–Vis, and luminescence), elemental analysis (CHN), and single-crystal X-ray diffraction. The structure of 1 is centrosymmetric binuclear complex and each Ni(II) cation is five-coordinated in a slightly distorted square-pyramidal configuration. In this binuclear complex, the Ni…Ni distance is 3.533(1)Å. Furthermore, the luminescence emission of the title complex was blue-shifted and is stronger than that of free 6-methyl-2,2'-bipyridine ligand. Thermal stabilities of this complex was also studied by thermogravimetric analysis.
https://ijcce.ac.ir/article_33338_1463eb75eabbe08d80e520d557184109.pdf
Crystal structure
Nickel(II) complex
6-Methyl-2,2'-bipyridine
Luminescence spectroscopy
Thermogravimetric analysis
eng
Iranian Institute of Research and Development in Chemical Industries (IRDCI)-ACECR
Iranian Journal of Chemistry and Chemical Engineering
1021-9986
2020-04-01
39
2
123
131
10.30492/ijcce.2020.39790
39790
Characterization of Microbubble-Based Drilling Fluids: Investigating the Role of Surfactants and Polymers
Hamid Reza Poorabbasi
hamidreza.poorabbasi@modares.ac.ir
1
Mehrdad Manteghian
manteghi@modares.ac.ir
2
Hormoz Ghalavand
ghalavand.h.nioc@gmail.com
3
Faculty of Chemical Engineering, Tarbiat Modares University, Tehran, I.R. IRAN
Faculty of Chemical Engineering, Tarbiat Modares University, Tehran, I.R. IRAN
Exploration Directory, National Iranian Oil Company, Tehran, I.R. IRAN
Colloidal Gas Aphrons (CGA), consist of gas bubbles with diameters ranging from 10 to 100 micron, surrounded by a thin aqueous surfactant film. This fluid combines certain surfactants and polymers to create the systems of microbubbles. The function of surfactant in CGAs is to produce the surface tension to contain the aphrons. Also, a biopolymer needs to be considered in the formulation as a viscosifier as well as a stabilizer. The aphron-laden fluid appears to be particularly well suited for drilling through depleted zones. The unique feature of aphron based fluids is to form a solid free, tough, and elastic internal bridge in pore networks or fractures to minimize deep invasion using air microbubbles. This microenvironment seal readily cleans up with reservoir flow back as production is initiated, thereby reducing the cost associated with stimulation processes. This paper presents a comprehensive, comparative study of rheological behavior and filtration properties of CGA based drilling fluids with various concentrations of polymer and surfactant. Laboratory evaluations showed that the CGA based fluid is one of the ideal engineering materials which can control and kill the loss circulation, save cost and increase productivity in which rheological characteristics and filtration properties of them are greatly influenced by the level of polymer and surfactant concentration.
https://ijcce.ac.ir/article_39790_2cf04102d804dc2e3375c1f28b6cf25e.pdf
Colloidal gas aphron
Microbubble
Shear-thinning
biopolymer
rheology
microscopy
eng
Iranian Institute of Research and Development in Chemical Industries (IRDCI)-ACECR
Iranian Journal of Chemistry and Chemical Engineering
1021-9986
2020-04-01
39
2
133
143
10.30492/ijcce.2020.33689
33689
Promotion of the Cupellation Method for Accurate Determination of Gold Alloy’s Karat Containing Platinum-Group Metals
Farahnaz Rejali
isiri.tc174@gmail.com
1
Behzad Rezaei
rezaei@cc.iut.ac.ir
2
Department of Chemistry, Isfahan University of Technology, Isfahan, I.R. IRAN
Department of Chemistry, Isfahan University of Technology, Isfahan, I.R. IRAN
The main standard method for gold karat determination is the cupellation method. However, this method is not sufficiently accurate to determine gold karat in the presence of insoluble Platinum–Group Metals (PGMs), such as Ir, Ru, and Rh. In this study, for the first time, a complementary method that can be used coupled with the reference cupellation method is presented for the highly accurate determination of gold karat containing PGMs. According to this method, gold metal was separated from the PGMs by dissolving parted cornets in aqua regia and then, its selective precipitation using an aqueous solution of SO2 gas as a reducing agent. The gold amount in alloys containing PGMs was determined using the suggested strategy with an excellent recovery, high accuracy (average relative error=0.12%) and precision (SD=0.6 for n=3). The optimized volume of aqueous SO2 solution was 35 mL that provides a gold recovery as high as 99.7% with enough big grain size and high purity (999.0‰). The proposed strategy was successfully used to determine the gold amount in secondary gold jewelry containing Ir, Rh, and Ru (a gold recovery of 99.9% with a relative error of 0.07 was obtained). The obtained karat was comparable with the other methods. Accordingly, the proposed method will be a promising simple and available assay for gold alloys containing PGMs, which could be used routinely in most cupellation labs all over the world.
https://ijcce.ac.ir/article_33689_d537299fd2753d79392206dc9d390a46.pdf
Cupellation method
Platinum-group metals
Gold karat
Gold alloys
eng
Iranian Institute of Research and Development in Chemical Industries (IRDCI)-ACECR
Iranian Journal of Chemistry and Chemical Engineering
1021-9986
2020-04-01
39
2
145
157
10.30492/ijcce.2020.33284
33284
Activity Coefficients of NaClO4 in (PEG 4000 + H2O) Mixtures at (288.15, 298.15 and 308.15) K
Jaime W. Morales
jaime.morales@pucv.cl
1
Hector R. Galleguillos
hector.galleguillos@uantof.cl
2
Felipe Hernández-Luisc
ffhelu@ull.edu.es
3
Raquel Rodríguez-Raposoc
rrraposo@ull.edu.es
4
Escuela de Ingeniería Química, Pontificia Universidad Católica de Valparaíso, CHILE
Departamento de Ingeniería Química y Procesos de Minerales, CICITEM, Universidad de Antofagasta, CHILE
Departamento de Química, Facultad de Ciencias, Universidad de La Laguna, Tenerife, Islas Canarias, ESPAÑA
Departamento de Química, Facultad de Ciencias, Universidad de La Laguna, Tenerife, Islas Canarias, ESPAÑA
The cell potential of the cell containing two ion-selective electrodes (ISE), Na-ISE | NaClO4 (m), PEG 4000 (Y), H2O (100-Y) | ClO4-ISE has been measured at temperatures of (288.15, 298.15, and 308.15) K as a function of the weight percentage Y of PEG 4000 in a mixed solvent at a 1 Mpa and the standard state for measured activity coefficients will be a solution of the salt in pure water. Y was varied between (0 and 25) wt.% in five-unit steps and the molality of the electrolyte (m) was between 0.05 mol kg-1 and almost saturation. The values of the standard cell potential were calculated using routine methods of extrapolation together with extended Debye-Hückel and Pitzer equations. The results obtained produced good internal consistency for all the temperatures studied. Once the standard electromotive force was determined, the mean ionic activity coefficients for NaClO4, the Gibbs energy of transfer from the water to the PEG 4000-water mixture, and the primary NaCl hydration number were calculated.
https://ijcce.ac.ir/article_33284_bfffe32d36496b028ae544900c1936e4.pdf
NaClO4
PEG 4000
cell potential
Ion-selective electrode
Activity Coefficient
eng
Iranian Institute of Research and Development in Chemical Industries (IRDCI)-ACECR
Iranian Journal of Chemistry and Chemical Engineering
1021-9986
2020-04-01
39
2
159
170
10.30492/ijcce.2020.34225
34225
Microwave Assisted Appraisal of Neem Bark Based Tannin Natural Dye and its Application onto Bio-mordanted Cotton Fabric
Shahid Adeel
shahidadeel@gcuf.edu.pk
1
Fazal-Ur Rehman
furminhas@gcuf.edu.pk
2
Muhammad Kaleem Khosa
mkhosapk@yahoo.com
3
Tahira Anum
tahiraanum6@gmail.com
4
Muhammad Shahid
mshahiduaf@yahoo.com
5
Khalid Mahmood Zia
drkmzia@gcuf.edu.pk
6
Mohammad Zuber
mohammadzuber@gmail.com
7
Department of Applied Chemistry, Government College University Faisalabad, Faisalabad 38000, PAKISTAN
Department of Applied Chemistry, Government College University Faisalabad, Faisalabad 38000, PAKISTAN
Department of Chemistry, Government College University Faisalabad, 38000, PAKISTAN
Department of Chemistry, Government College University Faisalabad, 38000, PAKISTAN
Department of Biochemistry, University of Agriculture Faisalabad 38000, PAKISTAN
Department of Chemistry, Government College University Faisalabad, 38000, PAKISTAN
The University of Lahore, Lahore Punjab, PAKISTAN
The current study is aimed to utilize the microwave for isolation of colorant from neem bark and its application onto chemical & bio-mordanted cotton fabric. For the purpose, aqueous, acid and organic media have been employed to isolate the colorant and to make its application onto surface modified and bio-mordanted cotton fabric followed by microwave treatment up to 6min. It is found that using optimum extraction and dyeing conditions, acceptable fastness properties have been rated when 9% of Al & Fe, 7% of tannic acid as pre chemical, 7% of acacia, 9% of henna, 7% of pomegranate & 5% of turmeric extract as pre bio mordants. Similarly, 5% of Al, 9% of T.A, 7% of pomegranate, and turmeric extract as post-mordants have been employed. It is recommended that isolation of colorant & dyeing under MW treatment has not only improved the natural dyeing process but also the addition of herbal-based bio-mordants have made the dyeing process more sustainable & ayurvedic. So it is concluded that microwave treatment has not only explored the coloring potential of neem bark but also made possible use of bio-mordants for making process more green with excellent color characteristics under reduced optimal conditions.
https://ijcce.ac.ir/article_34225_e4ba1feb10bb2219b395be7e7383f38a.pdf
Bio-Mordant
Cotton
Microwave Radiation
Neem Bark
Tannin
eng
Iranian Institute of Research and Development in Chemical Industries (IRDCI)-ACECR
Iranian Journal of Chemistry and Chemical Engineering
1021-9986
2020-04-01
39
2
171
180
10.30492/ijcce.2020.33368
33368
N, S-Codoped TiO2/Fe2O3 Heterostructure Assemblies for Electrochemical Degradation of Crystal Violet Dye
Pooja Sree Palukuru
ppoojasree@gmail.com
1
Vishnu Devangam A
vishnu.devangam@gmail.com
2
Dilip Kumar Behara
dileepbh.chemengg@jntua.ac.in
3
Department of Chemical Engineering, JNTUA College of Engineering, Ananthapuramu, INDIA
Department of Chemical Engineering, JNTUA College of Engineering, Ananthapuramu, INDIA
Department of Chemical Engineering, JNTUA College of Engineering, Ananthapuramu, INDIA
In contemporary research, “Heterostructure” assemblies play an important role in energy conversion systems, wherein the composite assemblies facilitate faster charge carrier transport across the material interfaces. The improved/enhanced efficiency metrics in these systems (electro/photo-electrochemical processes/devices) is due to synergistic interaction and synchronized charge transport across material interfaces. Herein, we report Type-I Heterostructure consists of N, S doped TiO2, and Fe2O3 for electrochemical crystal violet dye degradation studies. Synthesized N-S codoped TiO2/Fe2O3 composite heterostructured assemblies were fabricated on Titanium (Ti) substrate and used for electrochemical analysis. Complete decolorization was achieved with all the fabricated electrodes and a higher rate of degradation was achieved with the composite electrode (Ti/TiO2/Fe2O3) in comparison to individual electrodes (bare Ti, Ti/TiO2, Ti/Fe2O3). Further, a probabilistic mechanism of degradation is proposed in support of the hypothesis. The outcomes of the present work will have a profound effect on doped semiconductor heterostructure assemblies in the degradation of complex dye molecules of industrial outlets.
https://ijcce.ac.ir/article_33368_f71d4b1d32a087c7430989add161f8e6.pdf
Type-I Heterostructure
TiO2
Fe2O3
Crystal violet dye
eng
Iranian Institute of Research and Development in Chemical Industries (IRDCI)-ACECR
Iranian Journal of Chemistry and Chemical Engineering
1021-9986
2020-04-01
39
2
181
189
10.30492/ijcce.2020.34019
34019
Investigation of Affecting Parameters on the Adsorption of Lead (II) from Aqueous Solutions on Henna Powdered Leaves
Reza Davarnejad
r-davarnejad@araku.ac.ir
1
Amir Shoaie
amirshoaee0084@gmail.com
2
Zahra Karimi Dastnayi
baharkarimi70@yahoo.com
3
Mahboubeh Chehreh
mahboubechehre107@gmail.com
4
Department of Chemical Engineering, Faculty of Engineering, Arak University, P.O. Box 38156-8-8349 Arak, I.R. IRAN
Department of Chemical Engineering, Islamic Azad University, Farahan Branch, Farahan, I.R. IRAN
Department of Chemical Engineering, Faculty of Engineering, Arak University, P.O. Box 38156-8-8349 Arak, I.R. IRAN
Department of Chemical Engineering, Faculty of Engineering, Arak University, P.O. Box 38156-8-8349 Arak, I.R. IRAN
In the present study, the removal of lead (II) ions from aqueous solutions was investigated by powdered Henna. Henna is a herbal material that can dramatically adsorb metal ions. Adsorption experiments were carried out in a batch system at room temperature. Then, the equilibrium concentration of each sample was analyzed by atomic adsorption device. The effects of various parameters such as time, initial concentration, adsorbent amount, and pH were investigated. pH, initial concentration, and adsorbent amount showed sharp effects on the adsorption rate. The effect of time on the process was not considerable, as well. The optimum operating conditions were found at pH of 4.78, time of 49.47 min, lead (II) initial concentration of 93.5 mg/L, and adsorbent amount of 1 g led to 97.8% removal of lead (II). Furthermore, Langmuir and Freundlich adsorption isotherms were investigated for the lead (II) adsorption process on Henna. The results showed that Langmuir's isotherm model is more suitable for this process (R2=0.947).
https://ijcce.ac.ir/article_34019_7e87e3fb2f4e196dbedf6d19b72a1977.pdf
Adsorption
Biomass
Henna leaves
Optimization
Pb(II)
eng
Iranian Institute of Research and Development in Chemical Industries (IRDCI)-ACECR
Iranian Journal of Chemistry and Chemical Engineering
1021-9986
2020-04-01
39
2
191
202
10.30492/ijcce.2020.33686
33686
Green Removal of Toxic Th(IV) by Amino-Functionalized Mesoporous TiO2-SiO2 Nanocomposite
Simin Janitabar Darzi
sjanitabar@aeoi.org.ir
1
Shahrzad Abdolmohammadi
s.abdolmohamadi@iauet.ac.ir
2
Mohammad Hossein Latifi
mohammadhoseynlatifi@yahoo.com
3
Materials and Nuclear Fuel Research School, Nuclear Science and Technology Research Institute, P.O. Box 14395-836 Tehran, I.R. IRAN
Department of Chemistry, East Tehran Branch, Islamic Azad University, Tehran, I.R. IRAN
Department of Chemistry, East Tehran Branch, Islamic Azad University, Tehran, I.R. IRAN
Mesoporous TiO2-SiO2 nanocomposite (TS) was synthesized via sol-gel method and Amino-functionalized using 3-(aminopropyl) triethoxysilane. prepared amino-functionalized TiO2-SiO2 (NH2TS) was evaluated for eliminating radioactive Th(IV) ion in comparison with (TS). The prepared nanocomposites were characterized using FT-IR, XRD, DSC-TGA, SEM, EDS, BET, and BJH analyses. DSC and TGA analyses revealed that the total organic content of the NH2TS was at about 4%. According to the XRD patterns, synthesized nanocomposites exhibited only the crystalline anatase phase, and the sizes of the anatase crystallites in the prepared TS and NH2TS calculated to be 10.4 and 14.1nm, respectively. Moreover, the pore diameters of TS and NH2TS estimated to be 4.65 and 3.632 nm according to their BJH plot. The kinetic data of Th(IV) uptake process on both of two nanocomposites corresponded well to the pseudo-second-order equation. Adsorption thermodynamic parameters including the standard enthalpy, entropy, and Gibbs free energy revealed that the ion exchange reactions on both of NH2TS and TS nanocomposites were endothermic and spontaneous processes. The results indicated that NH2TS exhibited higher adsorption affinity toward Th(IV) compared to TS. Moreover, based on the Langmuir model, the maximum adsorption capacity of NH2TS nanocomposite towards the Th (IV) was found to be 1000 mg/g.
https://ijcce.ac.ir/article_33686_884dc76a8e7b75078784bdba2ac01efe.pdf
TiO2-SiO2
amino-functionalization
Th (IV) ion removal
Nanocomposite
Gibbs free energy
eng
Iranian Institute of Research and Development in Chemical Industries (IRDCI)-ACECR
Iranian Journal of Chemistry and Chemical Engineering
1021-9986
2020-04-01
39
2
203
206
10.30492/ijcce.2020.33367
33367
Quantification of Sterol Contents in Almond (PrunusamygdalusL.) Oils
Bertrand Matthäus
bertrand.matthaeus@mri.bund.de
1
Mehmet Musa Özcan
mozcan@selcuk.edu.tr
2
Max Rubner-Institut (MRI) Federal Research Institute for Nutrition and Food, Department for Safety and Quality for Cereals Schützenberg 12 D-32756 Detmold, GERMANY
Department of Food Engineering, Faculty of Agricultural, Selcuk University, 42031 Konya, TURKEY
In this study, the sterol contents of almond kernel oils collected from naturally growing almond trees in Mersin province were determined. Generally, the sterol contents of almond oil samples varied depending on almond types. The major sterols in almond oils wereß-sitosterol, 5-avenasterol and campesterol, followed by 5,24-stigmastadienol, stigmasterol, sitostanol, and cholesterol. While β-sitosterol contents of almond oils varied between 1986 mg/kg (T26) and 3908 mg/kg (T16), 5-avenasterol contents of almond oils samples were in the range between 215.9 mg/kg (T31) and 581.7 mg/kg (T16). In addition, campesterol contents of oils were found from 75.8 mg/kg (T31) to 172.3 mg/kg (T16). Interestingly, all sterol contents (except cholesterol, brassicasterol and 7-campesterol) of T16 almond oil were found higher than those of the other almond types. The current study showed that almond kernels of the investigated almond types from Turkey are potential sources of valuable oil which might be used as edible oil or industrial applications.
https://ijcce.ac.ir/article_33367_4020b98f246a21aa14528cb0ac9940ae.pdf
Almond
type
kernel oil
sterol
GC and GC-MS
eng
Iranian Institute of Research and Development in Chemical Industries (IRDCI)-ACECR
Iranian Journal of Chemistry and Chemical Engineering
1021-9986
2020-04-01
39
2
207
215
10.30492/ijcce.2020.36074
36074
Chemical Composition and Biological Activities of Essential Oil and Methanol Extract of Teucrium scordium
Parisa Ebrahimi
p_ea97@yahoo.com
1
Fateme Aboee-Mehrizi
f_aboee@yahoo.com
2
Mahmood Dehghani Ashkezari
mdashkezarey@gmail.com
3
Samaneh Sedighi
s_sedighi90@yahoo.com
4
Henghame Amirian
hengame_amirian@yahoo.com
5
Medical Biotechnology Research Center, Ashkezar Branch, Islamic Azad University, Ashkezar, Yazd, I.R. IRAN
Department of Medicine, Yazd Branch, Islamic Azad University, Yazd, I.R. IRAN
Medical Biotechnology Research Center, Ashkezar Branch, Islamic Azad University, Ashkezar, Yazd, I.R. IRAN
Medical Biotechnology Research Center, Ashkezar Branch, Islamic Azad University, Ashkezar, Yazd, I.R. IRAN
Department of Medicine, Yazd Branch, Islamic Azad University, Yazd, R. IRAN
In this study, the chemical composition of the essential oil of Teucrium scordium was studied using capillary GC and GC/MS instruments. In addition, the antimicrobial and cytotoxic activities of the oil and methanol extract were evaluated by disc diffusion and MTT assays, respectively. Forty-three volatile components were identified from the oil of aerial parts, representing of 98.1% of total oil. The major constituents were trans-α-bergamotene (52.3%), (Z)-α-trans-bergamotol (18.1%), linalool (3.0%) and piperitenone oxide (2.9%). The best anti-bacterial activity was observed for the methanol extract against Staphylococcus epidermidis with ZI (19.0 ± 0.47) mm and also against Proteus mirabilis with MIC value of 1.25 µg/mL.Investigation of the samples on cell viability of HeLa cells showed good activity for the essential oil with an IC50 value of 5.2 µg/mL. Our results indicated that Teucrium scordium can be considered for further analyses as an effective and safe curing agent for cancer and pathogenic infection therapies.
https://ijcce.ac.ir/article_36074_f69fe338e9270b3a3be00253be6a53ed.pdf
Teucrium scordium
essential oil
Antimicrobial activity
Cell viability
eng
Iranian Institute of Research and Development in Chemical Industries (IRDCI)-ACECR
Iranian Journal of Chemistry and Chemical Engineering
1021-9986
2020-04-01
39
2
217
231
10.30492/ijcce.2020.39791
39791
A Comparative Study between Different Tunisian Propolis Essential Oils and Their Antioxidant Activities
Jihene Ayari
jihneayari@yahoo.fr
1
Iness Jabri Karoui
iness.karoui@yahoo.fr
2
Manef Abderrabba
abderrabbamanef@gmail.com
3
Laboratoire Matériaux Molécules et Applications, Institut Préparatoire des Etudes Scientifiques et Techniques, IPEST, BP 51, 2070 La Marsa, TUNISIA
Laboratoire Matériaux Molécules et Applications, Institut Préparatoire des Etudes Scientifiques et Techniques, IPEST, BP 51, 2070 La Marsa, TUNISIA
Laboratoire Matériaux Molécules et Applications, Institut Préparatoire des Etudes Scientifiques et Techniques, IPEST, BP 51, 2070 La Marsa, TUNISIA
Propolis is a resinous substance collected by bees from plants with a complex and variable chemical composition. Propolis and its fractions possess multiple biological activities. This study focused on a chemical and statistical comparison between four Tunisian Propolis Essential Oils (PEO) and its antioxidant activities. Volatile oils were extracted by hydrodistillation and analyzed by GC-MS. Essential oil yield varied from 0.095% to 0.324%. A total of 59 volatile components were identified mainly dominated by sesquiterpenes and diterpenes hydrocarbons. Six major components were found in all samples collected from the four different locations α-Cedrol, Manoyl Oxide, Manool, Totarol, Tricosane, and Eicosane. The antioxidant activities of Tunisian propolis essential oils have been evaluated using two methods: β-carotene-linoleic acid bleaching and DPPH radical scavenging assays and the results were compared with the standard antioxidant (Triolox). PEO from Bizerte region presented a lower IC50 value (30.5 mg/mL) than that of the standard antioxidant Trolox (IC50 = 40.05 mg/mL) indicating high antioxidant capacity using DPPH assay but for the b-carotene-linoleic acid bleaching assay, PEO from Zouarine region had the lowest value of (IC50 = 26.5 mg/mL) compared to standard (IC50 = 31.25 mg/mL). Our findings demonstrated that Propolis Essential Oil (PEO) possess high antioxidant activities and may be suggested as a new potential source of natural antioxidant.
https://ijcce.ac.ir/article_39791_4b7d7296695531fbd8f707798d9dacde.pdf
Tunisian Propolis
essential oil
GC/MS
Antioxidant Activity
α-Cedrol
eng
Iranian Institute of Research and Development in Chemical Industries (IRDCI)-ACECR
Iranian Journal of Chemistry and Chemical Engineering
1021-9986
2020-04-01
39
2
233
242
10.30492/ijcce.2020.34020
34020
Encapsulation of Zataria multiflora Essential Oil in Saccharomyces cerevisiae: Sensory Evaluation and Antibacterial Activity in Commercial Soup
Maryam Nakhaee Moghadam
mn.moghadam@gmail.com
1
Jebrail Movaffagh
movaffaghj@mums.ac.ir
2
Bibi Sedighe Fazli Bazzaz
fazlis@mums.ac.ir
3
Mohammad Azizzadeh
azizzadeh@gmail.com
4
Abdollah Jamshidi
ajamshid@um.ac.ir
5
Department of Food Hygiene, Faculty of Veterinary Medicine, Ferdowsi University of Mashhad, Mashhad, I.R. IRAN
Targeted Drug Delivery Research Center, Pharmaceutical Technology Institute, Mashhad University of Medical Sciences, Mashhad, I.R. IRAN
Biotechnology Research Center, Pharmaceutical Technology Institute, Mashhad University of Medical Sciences, Mashhad, I.R. IRAN
Department of Clinical Sciences, Faculty of Veterinary Medicine, Ferdowsi University of Mashhad, Mashhad, I.R. IRAN
Department of Food Hygiene, Faculty of Veterinary Medicine, Ferdowsi University of Mashhad, Mashhad, I.R. IRAN
Nowadays rising consumer concern on the safety of synthetic chemical food preservatives is a reason for finding natural new antimicrobial agents, especially among the components of medicinal plants such as Essential Oils (EOs). However, most EOs are sensitive to oxygen, light, and temperature and can be easily degraded. Some EOs have strong taste, flavor, and affect the organoleptic characteristics of foods. Encapsulation can control these unpleasant characteristics. Using yeast cells as encapsulating agents and delivery systems for active ingredients has been widely investigated. Encapsulation in yeast cells has a wide range of advantages such as processes simplicity, commercial availability, low cost-high volume process, and needless of toxic solvents. In this study, the antibacterial activity of free and encapsulated Zataria multiflora Bioss. Essential Oil (ZEO) in Saccharomyces cerevisiae against Escherichia coli O157:H7 and Listeria monocytogenes as important foodborne pathogens were evaluated. The sensory evaluation of both forms of ZEO in a food model was also done. ZEO was successfully encapsulated into S. cerevisiae cells. Carvacrol and thymol contents in loaded yeasts were determined. The minimum inhibitory concentration (MIC) and minimum bactericidal concentration (MBC) of free and loaded ZEO were studied against Escherichia coli O157:H7 and Listeria monocytogenes; their antibacterial effects in the commercial chicken soup was investigated, and their sensory attributes in the commercial soup were evaluated as well. Our results showed significant decreases in the MIC and MBC values of ZEO in culture media after encapsulation; however, the antibacterial activity of ZEO in commercial chicken soup showed no significant differences after encapsulation (P>0.05). ZEO encapsulation improves its sensory score and hence, decreases its organoleptic effects in food (P<0.01). Considering acceptable sensorial scores of loaded ZEO in yeast cells, this method can practically be applied in food systems as natural biopreservation.
https://ijcce.ac.ir/article_34020_ed1e3e037dcff0868252f7ebac695032.pdf
Zataria multiflora Bioss
essential oil
Saccharomyces cerevisiae
encapsulation
Escherichia coli O157:H7
Listeria monocytogenes
eng
Iranian Institute of Research and Development in Chemical Industries (IRDCI)-ACECR
Iranian Journal of Chemistry and Chemical Engineering
1021-9986
2020-04-01
39
2
243
249
10.30492/ijcce.2020.33688
33688
Effect of 1,2,3-Trichloropropane as Tri-Functional Monomer on Thermophysical Properties of Poly(ethylene tetrasulfide)
Mina Amangah
m_amangah@sut.ac.ir
1
Mehdi Salami Kalajahi
m.salami@sut.ac.ir
2
Hossein Roghani-Mamaqani
r.mamaghani@sut.ac.ir
3
Department of Polymer Engineering, Sahand University of Technology, P.O. Box 51335-1996, Tabriz, I.R. IRAN
Department of Polymer Engineering, Sahand University of Technology, P.O. Box 51335-1996, Tabriz, I.R. IRAN
Department of Polymer Engineering, Sahand University of Technology, P.O. Box 51335-1996, Tabriz, I.R. IRAN
In this study, the effect of 1,2,3-trichloropropane (TCP) as trifunctional monomer on thermophysical properties of synthesized poly(ethylene tetrasulfide) (PETS) is investigated. To this end, different amounts of TCP (0-40 mol. % of halide-containing monomer) were incorporated into the structure of polysulfide polymer via interfacial condensation polymerization. Measurement of gel, fraction showed that by the introduction of only 10 mol. % of TCP, synthesized structure is almost crosslinked. The X-Ray Diffraction (XRD) results revealed that all samples are semi-crystalline whereas the crystallinity of samples strongly depends on the amount of TCP. All samples showed a glass transition temperature (Tg) less than 0 °C followed by melting temperature (Tm). Higher amountof crosslinking monomer resulted in higher Tg while Tm and heat of fusion (ΔHm) were reduced. According to ThermoGravimetric Analysis (TGA) results, all samples exhibited a two-stage degradation process. Although, the introduction of 10 mol. % TCP into the structure of PETS resulted in lower thermal stability of obtained polymer, adding higher amounts of TCP led to the higher thermal stability of polymers.
https://ijcce.ac.ir/article_33688_19df5da0d789a5630c5b0c57f7e83e28.pdf
Polysulfide
Poly(ethylene tetrasulfide)
1,2,3-trichloropropane
crosslinking
thermo-physical properties
eng
Iranian Institute of Research and Development in Chemical Industries (IRDCI)-ACECR
Iranian Journal of Chemistry and Chemical Engineering
1021-9986
2020-04-01
39
2
251
261
10.30492/ijcce.2020.33734
33734
A New Mathematical Model for the Prediction of Internal Recirculation in Impinging Streams Reactors
Hoda Safaei
hoda.safaee@yahoo.com
1
Morteza Sohrabi
sohrabi@aut.ac.ir
2
Cavus Falamaki
c.falamaki@aut.ac.ir
3
Sayed Javid Royaee
royaeesj@ripi.ir
4
Chemical Engineering Department, Amirkabir University of Technology, Tehran, I.R. IRAN
Chemical Engineering Department, Amirkabir University of Technology, Tehran, I.R. IRAN
Chemical Engineering Department, Amirkabir University of Technology, Tehran, I.R. IRAN
Petroleum Refining Technology Development Division, Research Institute of Petroleum Industry (RIPI), Tehran, I.R. IRAN
A mathematical model for the prediction of internal recirculation of complex impinging stream reactors has been presented. The model constitutes a repetition of a series of ideal plug flow reactors and CSTR reactors with recirculation. The simplicity of the repeating motif allows for the derivation of an algebraic relation of the whole system using the Laplace transform. An impinging streams reactor system with one axial and two tangential inlet fluid streams was constructed and considered as a case study. The model predicts satisfactorily the complex and flow rate dependent experimental residence time distribution functions obtained employing a pulse tracer method for different total flow rates of the incoming feed. The variation of the controlling parameters with changing the total inlet flow rate is discussed. The presented model can predict complex internal recirculation streams within the impinging streams reactor system.
https://ijcce.ac.ir/article_33734_73466bae8c6e3f80b6383c680a261d32.pdf
Impinging streams reactor
residence time distribution
internal recirculation
Mathematical modeling
eng
Iranian Institute of Research and Development in Chemical Industries (IRDCI)-ACECR
Iranian Journal of Chemistry and Chemical Engineering
1021-9986
2020-04-01
39
2
263
272
10.30492/ijcce.2020.37707
37707
Numerical Simulation of Micropolar Flow in a Channel under Osciatory Pressure Gradient
Muhammad Ashraf
meharashraf25@gmail.com
1
Kashif Ali
kashifali_381@yahoo.com
2
Muhammad Ashraf
mashraf_mul@yahoo.com
3
Centre for Advanced Studies in Pure and Applied Mathematics, Bahauddin Zakariya University, Multan, PAKISTAN
Department of Basic Sciences and Humanities, Muhammad Nawaz Sharif University of Engineering and Technology, Multan, PAKISTAN
Centre for Advanced Studies in Pure and Applied Mathematics, Bahauddin Zakariya University, Multan, PAKISTAN
We numerically investigate the pulsatile flow and heat transfer of a micropolar fluid through a Darcy-Forchhmeir porous channel in the presence of wall transpiration. We use the central difference approximations for the spatial derivatives, whereas the time integration has been performed by employing the three steps explicit Runge-Kutta method to obtain the numerical solution. It is noted that the Darcy parameter tends to accelerate the fluid, whereas the Forchheimer quadratic drag parameter and the magnetic parameter would reduce the flow velocity. The effect of the steady component of the pressure gradient is to remarkably accelerate the flow whereas that of the oscillatory component is time-dependent. An increase in the Prandtl number tends to almost straighten the temperature profiles.
https://ijcce.ac.ir/article_37707_4d205a80bdd2144c868985b775aec4e1.pdf
Pulsatile flow, Darcy-Forchhmeir model
Micropolar fluid
Three-step explicit R.K. method
eng
Iranian Institute of Research and Development in Chemical Industries (IRDCI)-ACECR
Iranian Journal of Chemistry and Chemical Engineering
1021-9986
2020-04-01
39
2
273
288
10.30492/ijcce.2020.37001
37001
Numerical Study on Parameters Affecting the Structure of Scaffolds Prepared by Freeze-Drying Method
Mahdi Madelatparvar
mahdi_mp@yahoo.com
1
Mahdi Salami Hosseini
salami@sut.ac.ir
2
Farhang Abbasi
f.abbasi@sut.ac.ir
3
Faculty of Polymer Engineering, Sahand University of Technology, Tabriz, I.R. IRAN
Faculty of Polymer Engineering, Sahand University of Technology, Tabriz, I.R. IRAN
Faculty of Polymer Engineering, Sahand University of Technology, Tabriz, I.R. IRAN
Freeze-drying is one of the most used methods for preparing scaffolds and is very sensitive to the material and operational parameters such as nucleation temperature, thermal properties of the mold, cooling rate, set freezing point, and slurry height. In the present study, a Finite Element Method (FEM) based code was developed to investigate the effects of such parameters and to eventually predict the microstructure of the scaffold. Similar molds and cooling conditions used in various experimental studies were simulated and compared. The achieved pattern demonstrated how different thermal condition tailored scaffold microstructure. It was shown that nucleation temperature (Tn) was an effective parameter controlling the final structure of the scaffold and influenced pore sizes with different mold materials. Simulation results also showed that by decreasing the rate of cooling, the average pore sizes increased, and a quenching solution led to a randomly distributed pattern of pore sizes. It is also achieved that by increasing the set freezing temperature as well as the height of the solution the pore sizes increased more at the top of the mold. The thermal gradient also illustrated the orientation of the pore in a mold with the thick isolated wall was considerably uniform. This framework can be used to optimize the scaffold structure or any ice templating method.
https://ijcce.ac.ir/article_37001_6a8e54d52d43ddac6923d6f133717cc3.pdf
Finite element Methods
Scaffold
Freeze-drying
ice
crystal size
eng
Iranian Institute of Research and Development in Chemical Industries (IRDCI)-ACECR
Iranian Journal of Chemistry and Chemical Engineering
1021-9986
2020-04-01
39
2
289
297
10.30492/ijcce.2020.43271
43271
Studies on the Influence of Various Metabolic Uncouplers on the Biodegradation Rate of Toluene in a Biofilm Bio-Filter Reactor
Suganya Baskaran
suganyab@svce.ac.in
1
Swaminathan Detchanamurthy
swamibiochem@gmail.com
2
Department of Chemical Engineering, Sri Venkateswara College of Engineering, Pennalur, Sriperumbudur, Tamilnadu-602117, INDIA
Department of Chemical Engineering, Sri Venkateswara College of Engineering, Pennalur, Sriperumbudur, Tamilnadu-602117, INDIA
Biological inhibition of air pollution has vast advantages over physicochemical methods. One of the biggest challenges faced by researchers with traditional bio-filter in controlling Volatile Organic Compounds (VOCs) such as Benzene, Toluene, Ethylbenzene and Xylene (BTEX) is, low degradation rate (elimination capacity) and accumulation of very high biomass. The use of metabolic uncouplers involves uncoupling electron transport from oxidative phosphorylation reactions and thereby ATP production is less efficient, leads to more substrate utilization. So, this research is aimed to study the influence of different metabolic uncouplers on the biodegradation rate of toluene in a biofilm bio-filter reactor. The bio-filter reactor with Pseudomonas putida MTCC 10617 as biofilm in the presence of five different metabolic uncouplers such as Pentachlorophenol (PCP), 2, 4-Dinitrophenol (DNP), 2, 4, 6-Trichlorophenol (TCP), Benzoic Acid (BA) and Malonic Acid (MA) were studied. Results showed that only PCP and TCP increased the Surface Elimination Capacity (SEC) by 87% and 38% respectively. From the SEM analysis, larger and wider air interface cavities were observed in the biofilm subjected to PCP than TCP exposed biofilm. This infers the higher mass transfer in biofilm exposed to PCP.
https://ijcce.ac.ir/article_43271_894c16de89f371a566dca4964fdaf412.pdf
biofilm
Bioreactor
metabolic uncoupler
surface elimination capacity