Iranian Institute of Research and Development in Chemical Industries (IRDCI)-ACECRIranian Journal of Chemistry and Chemical Engineering1021-998638220190401Immobilization of MoO2(acac)2 on Multiwall Carbon Nano Tube and Epoxidation of Alkenes183076410.30492/ijcce.2019.30764ENMahdieh NafarSchool of Chemistry, Damghan University, Damghan, I.R. IRANGholamhossein GrivaniSchool of Chemistry, Damghan University, Damghan, I.R. IRANJournal Article20161213<em>The acidic group (-CO<sub>2</sub>H) of MultiWall Carbon Nanotube (MWCNT) converted to acyl chloride group (-COCl) producing of MVCNT@COCl. Then the reaction of MVCNT@COCl and MoO<sub>2</sub>(acac)<sub>2</sub> resulted in direct immobilization of the MoO<sub>2</sub>(acac)<sub>2</sub> and the formation of MVCNT@CO(acac)MoO<sub>2</sub>(acac) catalyst. In addition, the MVCNT@COCl was esterified by NaOC<sub>2</sub>H<sub>5</sub> and formed the esteric MVCNT@COC<sub>2</sub>H<sub>5</sub> reagent. In a subsequent reaction of MVCNT@COC<sub>2</sub>H<sub>5</sub> by ethylene diamine, the MVCNT@CONHCH<sub>2</sub>CH<sub>2</sub>NH<sub>2</sub> was produced. It was reacted with MoO<sub>2</sub>(acac)<sub>2</sub> and immobilized the MoO<sub>2</sub>(acac)<sub>2</sub> via imine bond formation and produced the MVCNT@CONHCH<sub>2</sub>CH<sub>2</sub>N(acac)MoO<sub>2</sub>(acac) catalyst. The functionalized MVCNT reagents <br /> were characterized by FT-IR spectra and elemental analysis. The molybdenum loading on MVCNT was determined by ICP analysis. The catalytic activity of the two molybdenum immobilized catalysts (MVCNT@COMoO<sub>2</sub>(acac)<sub>2</sub> and MVCNT@CONHCH<sub>2</sub>CH<sub>2</sub>N(acac)MoO<sub>2</sub>(acac)) was investigated in the epoxidation of cyclooctene and different reaction parameters such as solvent, oxidant, amount of catalyst and oxidant were optimized and the epoxidation of different alkenes was investigated in these optimized conditions. The obtained results showed that the supported catalysts of MVCNT@CO(acac)MoO<sub>2</sub>(acac)<sub>2</sub> and MVCNT@CONHCH<sub>2</sub>CH<sub>2</sub>N(acac)MoO<sub>2</sub>(acac) were highly active and selective in the epoxidation of a wide range of alkenes. The reusability of the supported catalysts was also studied. The results showed that they had good reusability in the epoxidation of alkenes.</em>https://ijcce.ac.ir/article_30764_c5d6fee4d3d612599e12682c2c72ca0a.pdfIranian Institute of Research and Development in Chemical Industries (IRDCI)-ACECRIranian Journal of Chemistry and Chemical Engineering1021-998638220190401Synthesis and Characterization of Nanoparticles Propolis Using Beeswax9193092710.30492/ijcce.2019.30927ENParisa ShaltoukiDepartment of Chemical Engineering, Quchan Branch, Islamic Azad University, Quchan, I.R. IRANElaheh MohamadiDepartment of Chemical Engineering, Shahrood Branch, Islamic Azad University, Shahrood, I.R. IRANMohammad Ali MoghaddasiDepartment of Chemical Engineering, Shahrood Branch, Islamic Azad University, Shahrood, I.R. IRANAfshin FarahbakhshDepartment of Chemical Engineering, Shahrood Branch, Islamic Azad University, Shahrood, I.R. IRANHooman BahmanpourDepartment of Environmental Engineering, Shahrood Branch, Islamic Azad University, Shahrood, I.R. IRANJournal Article20170614<em>In order to protection, convenient release, and increase of antibacterial of capsules to the treatment of diseases</em><em>, propolis nanoparticles encapsulate. Beeswax is used for covering because of its special physical</em><em> and chemical properties, ineffective and inactivity and ease of mixing</em><em>with materials without any adverse reaction. In this study, nanotechnology and renewable natural compounds of beeswax were used in the process</em><em> of encapsulating for protection against adverse environmental conditions. At first, propolis nanoparticles were mixed with</em><em>chloroform then ammonia buffer and Tween -80 was added to it while stirring with speed rpm 300. The mixture was shocked to form the capsule. After filtration and</em><em>washing produced capsules were dried </em><em>for 48 hours at room temperature. Assessment of formation and performance of the capsules was done</em><em> by changing parameters such as</em><em> pH, time and temperature, the loading of nanoparticles by spectrophotometry</em><em> method and increasing the antimicrobial properties using microbial</em><em> culture. Also, FT-IR analysis was done to prove the physical transplant of wax</em><em> and propolis. According to TEM images, the size of produced capsules was estimated</em><em> in the range of 200 to 500 nm with 95% distribution percentages. Based on Taguchi testing, the optimum time, temperature and pH for the release of encapsulated nanoparticles were 10 minutes, 43ºC and 10, respectively.</em>https://ijcce.ac.ir/article_30927_f6a8f70fecb66449918cf483ba2a6e01.pdfIranian Institute of Research and Development in Chemical Industries (IRDCI)-ACECRIranian Journal of Chemistry and Chemical Engineering1021-998638220190401Preparation, Characterization, and Application of Nanospherical α-Fe2O3 Supported on Silica for Photocatalytic Degradation of Methylene Blue21283042210.30492/ijcce.2019.30422ENAli Arasteh NodehChemical Engineering Department, Quchan Branch, Islamic Azad University, Quchan, I.R. IRANMajid SaghiYoung Researchers and Elite Club, Arak Branch, Islamic Azad University, Arak, I.R. IRANMohammad Khazaei NejadDepartment of Chemistry, Mashhad Branch, Islamic Azad University, Mashhad, I.R. IRANJournal Article20170925<em>In the research, spherical α-Fe<sub>2</sub>O<sub>3</sub> NanoParticles (NPs) were synthesized through Forced Hydrolysis and Reflux Condensation (FHRC) process and were supported on the surface of silica sand by Solid-State Dispersion (SSD) method. Characterization of silica and α-Fe<sub>2</sub>O<sub>3</sub>/SiO<sub>2</sub> catalyst was done using Fourier-Transform InfraRed (FT-IR) spectroscopy, Scanning Electron Microscopy (SEM) images, X-Ray Diffraction (XRD) patterns and Brunauer, Emmet and Teller (BET) surface area. The supported α-Fe<sub>2</sub>O<sub>3</sub>/SiO<sub>2</sub> nanocatalyst with the average crystallite size of 27.5 nm was used for photocatalytic removal of Methylene Blue (MB) from aqueous solutions under Ultra-Violet (UV) light.In order to optimization of effective parameters on MB degradation, the single-variable method was used. The optimal conditions were determined as pH=11, initial concentration of MB=10 ppm, and the mass of catalyst =1.0 g. Degradation efficiency in optimal conditions was 97.32%.</em>https://ijcce.ac.ir/article_30422_7ae81acb94b8d1c4aeb50c3ab66eed26.pdfIranian Institute of Research and Development in Chemical Industries (IRDCI)-ACECRIranian Journal of Chemistry and Chemical Engineering1021-998638220190401Photodegradation of Methylene Blue Solution via Au Doped TiO2 Nanocomposite Catalysts Prepared Using Novel Photolysis Method29353704910.30492/ijcce.2019.37049ENZaid Hamid MahmoudDepartment of Chemistry, Collage of Science, Diyala University, Baqubah, IRAQJournal Article20171018<em>Gold doped TiO<sub>2</sub> has been successfully synthesized via the photolysis method and is characterized by different techniques. NPs of gold doped TiO<sub>2</sub> were utilized for the degradation of methylene blue as a material pigmentation pollutant. The substitution of Au on TiO<sub>2</sub> surface was established via XRD, EDX, TEM, and FT-IR techniques. The TEM and SEM results appeared that the particles in the nano range and its size below 15nm. Without a catalyst, the degradation of dye under visible light in acid and nature medium gives humble results but good results at pH 11 while it gives excellent results at all conditions when using catalyst.</em>https://ijcce.ac.ir/article_37049_3b150bcbd7432442aab2caf4d09a645b.pdfIranian Institute of Research and Development in Chemical Industries (IRDCI)-ACECRIranian Journal of Chemistry and Chemical Engineering1021-998638220190401Electro-Catalytic Oxidation of Methanol at Ni(OH)2 Nanoparticles-Poly (o-Anisidine)/Triton X-100 Film onto Phosphotungstic Acid-Modified Carbon Paste Electrode37483058910.30492/ijcce.2019.30589ENMohammad-Saleh ZabihiDepartment of Chemistry, Faculty of Chemistry, North Tehran Branch, Islamic Azad University,
1913674711, Tehran, I.R. IRANJahanbakhsh RaoofElectroanalytical Chemistry Research Laboratory, Department of Analytical Chemistry, Faculty of Chemistry, University of Mazandaran, P.O. Box 47416-95447 Babolsar, I.R. IRANSayed Reza HosseiniNanochemistry Research Laboratory, Faculty of Chemistry, University of Mazandaran,
P.O. BOX 47416-95447 Babolsar, I.R. IRAN0000-0002-9521-0961Mahmoud Reza SohrabiDepartment of Chemistry, Faculty of Chemistry, North Tehran Branch, Islamic Azad University,
1913674711, Tehran, I.R. IRANJournal Article20170315<em><span>In this work, Phosphotungstic Acid modified Carbon Paste Electrode (PWA-CPE) is used as a substrate for electro-polymerization of o-Anisidine (OA). Also, Triton X-100 (TX-100) surfactant is used as an additive for electrochemical polymerization of OA onto the PWA-CPE, which is investigated as a novel matrix for dispersion of nickel species. The prepared electrodes are characterized by scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), and electrochemical methods. Growth of the poly o-Anisidine (POA) film in the absence of TX-100 and/or PWA is very poor, while it considerably increases in the presence of them. The methanol oxidation and stability of the Ni/POA (TX-100)/PWA-CPE are investigated by various </span><span>electrochemical techniques. It has been shown that the poly (o-Anisidine)/Triton X-100 (POA (TX-100))</span><span> at the surface of PWA-CPE improves the catalytic efficiency of the dispersed Ni(OH)<sub>2</sub> nanoparticles towards methanol oxidation.</span></em>https://ijcce.ac.ir/article_30589_b1bb6c879d44cc0651a7cd489fc43df4.pdfIranian Institute of Research and Development in Chemical Industries (IRDCI)-ACECRIranian Journal of Chemistry and Chemical Engineering1021-998638220190401Methanol-to-Hydrocarbons Product Distribution over SAPO-34 and ZSM-5 Catalysts: The applicability of Thermodynamic Equilibrium and Anderson-Schulz-Flory Distribution49593059110.30492/ijcce.2019.30591ENSaeed SahebdelfarCatalysis Research Group, Petrochemical Research & Technology Company, National Petrochemical Company, P.O. Box: 14358-84711 Tehran, I.R. IRANFereydoon YaripourCatalysis Research Group, Petrochemical Research & Technology Company, National Petrochemical Company, P.O. Box: 14358-84711 Tehran, I.R. IRANSomayeh AhmadpourDepartment of Chemical and Petroleum Engineering, Sharif University of Technology,
P.O. Box: 11365-8639 Tehran, I.R. IRANFarhad KhorashehDepartment of Chemical and Petroleum Engineering, Sharif University of Technology,
P.O. Box: 11365-8639 Tehran, I.R. IRANJournal Article20170817<em>The product distribution of methanol to hydrocarbons conversion over SAPO-34 and ZSM-5 catalysts was studied using thermodynamic equilibrium and Anderson-Schulz-Flory (ASF) distributions. The equilibrium compositions were calculated using constrained Gibbs free energy minimization. The effect of catalyst type was considered by setting upper limits to product carbon </em><em>number due to shape selectivity according to zeotype catalyst channel size; that is, n</em><em>£</em><em>5 for SAPO-34</em><em> but n</em><em>£</em><em>6 for aliphatic and n</em><em>£</em><em>10 for aromatic compounds over H-ZSM-5 catalyst. The equilibrium selectivity of kinds of paraffin is negligible over SAPO-34 system while that of olefins is very small over H-ZSM-5, both in agreement with experimental results for methanol to olefins and to gasoline</em><em>, </em><em>respectively. The methanol to olefins hydrocarbon product distributions over SAPO-34 and H-ZSM-5</em><em> showed fair agreements with thermodynamic equilibrium and ASF distributions, respectively. It was found that propylene is the only product the selectivity of which can be maximized among hydrocarbon products over both SAPO-34 and ZSM-5 catalysts, and therefore, it can be an easier target molecule in methanol to hydrocarbon conversions.</em>https://ijcce.ac.ir/article_30591_084f200a69f6f7b559e1c862b3683a14.pdfIranian Institute of Research and Development in Chemical Industries (IRDCI)-ACECRIranian Journal of Chemistry and Chemical Engineering1021-998638220190401Evaluation of Advanced Gravity and Magnetic Concentration of a PGM Tailings Waste for Chromite Recovery61713219310.30492/ijcce.2019.32193ENBoingotlo SetlhabiDepartment of Chemical, Metallurgy and Materials Engineering Tshwane University of Technology, Pretoria, SOUTH AFRICAAbimbola PopoolaDepartment of Chemical, Metallurgy and Materials Engineering Tshwane University of Technology, Pretoria, SOUTH AFRICALerato TshabalalaDepartment of Chemical, Metallurgy and Materials Engineering Tshwane University of Technology, Pretoria, SOUTH AFRICAAbraham AdelekeDepartment of Materials Science and Engineering, Obafemi Awolowo University, Ile Ife, NIGERIAJournal Article20160510<em>This research was aimed at evaluating the efficiency of advanced gravity and magnetic separations on the recovery of chromite from the fine Platinum Group Metals (PGM) tailings consisting of particles 80% passing 75 µm with about 45% being >45 µm resulting in high chromite losses. The PGM plant tailings were subjected to X-ray fluorescence, scanning electron microscopy and particle size distribution analyses. The feed was then optimally classified with 60 mm diameter hydro-cyclone into underflow and overflow streams. The coarser underflow was further beneficiated using the spiral concentrator. The results obtained showed that the removal of fines increased the Cr<sub>2</sub>O<sub>3 </sub>grade for the spiral feed from 12.27% to 17.64% while spiral concentrate grade improved from 14.84% to 21.46% and recovery 69.85% to 95.53%. Magnetic separation efficiency was found to increase with particle size such that at >75 µm a concentrate with up to 17.13% grade and 61.5% recovery was achieved. The advanced Falcon concentration was also observed to be mainly particle size dependent and at 45 µm up to 17% grade and 60.3% recovery was achieved. The results obtained are based on particles >45 µm and the finer particles </em>https://ijcce.ac.ir/article_32193_a81772147ec2901dda24888d01278dde.pdfIranian Institute of Research and Development in Chemical Industries (IRDCI)-ACECRIranian Journal of Chemistry and Chemical Engineering1021-998638220190401Development of a Hyphenated Method Called DLLME/TLM for Trace Analysis of Cd73833712310.30492/ijcce.2019.37123ENNader ShokoufiAnalytical Instrumentation & Spectroscopy Laboratory, Chemistry & Chemical Engineering Research Center of Iran, Tehran, I.R. IRANAmir HamdamaliAnalytical Instrumentation & Spectroscopy Laboratory, Chemistry & Chemical Engineering Research Center of Iran, Tehran, I.R. IRANJournal Article20170102<em>Dispersive Liquid-Liquid Microextraction / Thermal Lens Microscopy (DLLME/TLM) was developed as a new combination method for preconcentration and determination of Cd. Thermal Lens Microscopy is suitable for the determination of analyte after DLLME because of the low volume of the remained phase after DLLME and increasing of the enhancement factor for the nonpolar organic solvents. Some effective parameters on the micro extraction, complex formation and combination were selected and optimized. Under optimum conditions, the calibration graphs were linear in the range of 0.05-20 µg/L with the detection limit of 0.008 µg/L. The Relative Standard Deviation (RSD) for 1 and 10 µg/L of cadmium was 3.1 and 2.3, respectively. The enhancement factor of 1200 was obtained from a sample volume of 10.0 mL. DLLME/TLM method was applied to the analysis of real samples. The accuracy of the method was proved by using standard reference materials and micro spectrophotometry.</em>https://ijcce.ac.ir/article_37123_e102a011a44862d9ddc167c46ec9e0ad.pdfIranian Institute of Research and Development in Chemical Industries (IRDCI)-ACECRIranian Journal of Chemistry and Chemical Engineering1021-998638220190401Biological Study from Ruta Plants Extracts Growing in Tunisia85893712410.30492/ijcce.2019.37124ENBejaoui YosraLaboratoire Matériaux Molécules et Applications (LMMA), IPEST, BP51, La Marsa 2070, TUNISIEFaculté des Sciences de Bizerte, Université de Carthage, TUNISIEAbderrabba ManefLaboratoire Matériaux Molécules et Applications (LMMA), IPEST, BP51, La Marsa 2070, TUNISIEAyadi SamehInstitut National des Sciences et Technologies de la Mer (INSTM), Laboratoire Milieu Marin,
Centre la Goulette, TUNISIEJournal Article20170723<em>Ruta species are known as a potential source of natural products with biological activities. They are used in several fields such as in therapeutic and traditional medicine. In order to contribute to the valorization of these plants, this work investigated the chemical composition and antibacterial activity of the essential oils of Ruta montana and Ruta gravelons growing in tunisia (north of tunisia). The total phenolic content of these two essential oils was also studied. The antibacterial activities of essential oils were assessed against Escherichia coli (ATCC7625), Staphylococcus aureus (ATCC76110), Pseudomonas aeruginosa (ATCC 7624), Escherichia coli, Klebsiella pneumoniae, Staphylococcus aureus, and Pseudomonas aeruginosa. Results show that the chemical composition of essential oils was dominated by 2-undecanone (86.77%), followed by 2-decanone (4.91%) and 2-nonanone (23.62%). Furthermore, the total phenolic content in essential oil of Ruta gravelons is more important than the total phenolic content in essential oil of Ruta montana. Indeed, the value of total phenolic content is 41.70 mg Gallic acid equivalents per gram of dry extract, in essential oil of Ruta gravelons but the total phenolic content in essential oil of Ruta montana is a 7.50 mg Gallic acid equivalents per gram of dry extract. Besides, the ruta montana essential oil has the most important antibacterial activity than the Ruta gravelons essential oil especially against Staphylococcus aureus (ATCC76110) and Pseudomonas aeruginosa (ATCC 7624).</em>https://ijcce.ac.ir/article_37124_022256d2e24c6f37fda800b57045d95f.pdfIranian Institute of Research and Development in Chemical Industries (IRDCI)-ACECRIranian Journal of Chemistry and Chemical Engineering1021-998638220190401Biochar from Orange (citrus sinensis) Peels by Acid Activation for Methylene Blue Adsorption911053087710.30492/ijcce.2019.30877ENALI H. JawadSchool of Chemistry and Environment,
Faculty of Applied Sciences, Universiti Teknologi MARA, 40450 Shah Alam, Selangor, MALAYSIA0000-0002-4827-9093Dhafir T.A. Al-HeetimDepartment of Chemistry, College of Education for Pure Science Ibn-Al Haitham, Baghdad University, IRAQRamlah Abd RashidSchool of Chemistry and Environment,
Faculty of Applied Sciences, Universiti Teknologi MARA, 40450 Shah Alam, Selangor, MALAYSIAJournal Article20171005<em>In this work, orange (Citrus sinensis) peels biochar (OPBC) were prepared by one-step H<sub>2</sub>SO<sub>4</sub> activation for Methylene Blue (MB) adsorption from aqueous solution. The physicochemical properties of OPBC were characterized using instrumental analyses such as CHNS-O analyzer, Fourier Transform InfraRed (FT-IR) spectroscopy, Scanning Electron Microscopy (SEM), X-Ray Diffraction (XRD), and point-of-zero charge (pH<sub>pzc</sub>) analysis. Batch mode adsorption study was conducted by varying operational parameters such as adsorbent dosage (0.02 – 0.20 g), solution pH (3 – 11), initial MB concentrations (50 – 300 mg/L), and contact time (0 – 1440 min). The equilibrium data was found to better fit with Langmuir isotherm model compare to Freundlich and Temkin models. The maximum adsorption capacity, q<sub>max</sub> of OPBC for MB adsorption was 208.3 mg/g at 303 K. The kinetic study revealed that the present system obeyed Pseudo-Second-Order (PSO), model. The thermodynamic adsorption parameters such as standard enthalpy (ΔH°), standard entropy (ΔS°), and standard free energy (ΔG°) showed that the adsorption of MB onto OPBC surface endothermic in nature and spontaneous under the experimental conditions. All above-mentioned results indicate that the OPBC can feasibly employ for the elimination of MB from aqueous solution</em>https://ijcce.ac.ir/article_30877_f4be83636a50c16150fd24b9003970be.pdfIranian Institute of Research and Development in Chemical Industries (IRDCI)-ACECRIranian Journal of Chemistry and Chemical Engineering1021-998638220190401Removal of Direct Red 81 from Aqueous Solution Using an Acidic Soil Containing Iron (Case Study of Lahijan Soil)1071123105410.30492/ijcce.2019.31054ENSamaneh ShahsavaniDepartment of Environmental Health Engineering, School of Health, Student Research Committee, Shiraz University of Medical Sciences, Shiraz, I.R. IRANMansooreh DehghaniResearch Center for Health Sciences, Department of Environmental Health, School of Health, Shiraz University of Medical Sciences, Shiraz, I.R. IRANNarges ShamsediniDepartment of Environmental Health Engineering, School of Health, Student Research Committee, Shiraz University of Medical Sciences, Shiraz, I.R. IRANFars Water and Wastewater Company, Shiraz, I.R. IRANJournal Article20170902<em>Direct Red 81, a dye widely used in textile industries, is frequently detected dye in water resources. High costs, the formation of hazardous byproducts, and high energy costs restrict the use of some removal methods<strong>.</strong> Therefore, the main objectives of this research are the feasibility of using soil containing iron as a low-cost adsorbent to remove (Direct Red 81) from the aqueous phase and determining the optimum conditions for maximum removal efficiency. The present study was conducted at a bench scale. The influence of different parameters including the number of adsorbents; initial concentration of dye solution and pH at different time intervals on dye removal efficiency were investigated. The maximum removal rate of dye (84%) occurred in pH=7 in the presence of 1 g soil with the initial dye concentration of 50 mg/L at 30 min reaction time. Moreover, due to the effect of acidic pH and the iron content of used soil, a significant increase was observed in the rate of Direct Red 81dye removal. In conclusion, using soil containing iron is an appropriate method for the removal of Direct Red 81 from aqueous solutions.</em>https://ijcce.ac.ir/article_31054_da011cf8648664565b53ce4d2c5efa14.pdfIranian Institute of Research and Development in Chemical Industries (IRDCI)-ACECRIranian Journal of Chemistry and Chemical Engineering1021-998638220190401Application of Electrocoagulation Process for the Removal of Acid Orange 5 in Synthetic Wastewater1131193059310.30492/ijcce.2019.30593ENAref ShokriYoung Researchers and Elite Club, Arak Branch, Islamic Azad University, Arak, I.R. IRANJournal Article20171022<em>I<em>In this study, the Electro Coagulation (EC) was used for the removal of acid orange 5 from synthetic wastewater in a batch electrochemical reactor. The impact of the operational variables such as current density, initial pH, time of electrolysis, and initial concentration of the dye was investigated. The results showed that the optimum conditions were obtained at initial pH of 7, current density at 2 mA/cm<sup>2</sup>, 60 mg/lit of Acid orange 5 and time of reaction at 60 min. At optimum conditions, the removal efficiency of acid orange 5 and Chemical Oxygen Demand (COD) were 99.3 and 85.5%, respectively. The kinetic study showed that the removal reaction was first order and <br /> the rate constant and half-life of reaction were obtained.</em></em>https://ijcce.ac.ir/article_30593_1190368a77567ed03bdd38071beca79f.pdfIranian Institute of Research and Development in Chemical Industries (IRDCI)-ACECRIranian Journal of Chemistry and Chemical Engineering1021-998638220190401Anode Slime Gained During Electrolysis Process of Secondary Copper Anodes1211263712710.30492/ijcce.2019.37127ENNurten DevaUniversity of Mitrovica, Geoscinces Faculty.Department of Materials and Metallurgy, Republic of KOSOVOMusa RizajUniversity of Mitrovica, Geoscinces Faculty.Department of Materials and Metallurgy, Republic of KOSOVOIsmail DumanIstanbul Technical University, Faculty of Chemical and Metallurgical Engineering, TURKEYFlorian KongoliFlogen Technologies Inc., 1255 Laird Blvd., Quebec, H3P2T1, CANADAJournal Article20171101<em>The aim of this research is to get a better understanding of the electrolytic refining process in order to yield the anode slime. Three types of secondary copper anodes are electro refined in an electrolytic system, where the electrolyte is an acid of copper sulphate solution. As a result of the electro-refining process the anode slime has been gained as secondary product. The experimental research analysis of anode slime composition is done by two methods: X-Ray Fluorescent (XRF) method which is realized with the help of Thermoscientic Nitro XL 3t device and as second method X-Rays Diffractometry (XRD) is used, which is realized with the help of D8 Advance Bruker AXS equipment. The anode slime introduces a multi-component secondary product of electrolytic refining process of metals composed of insoluble components of Cu, Au, Ag, Pt, Pd, Ir, etc. The composition of the anode slimes varies according to the composition of the anodes. The qualitative preparation of raw material – anode slime of secondary Cu and its rational utilization will result in the optimization of the process of gaining metals for which it is dedicated. This study has shown that the anode slime contains gold, silver and platinum group of metals and these metals can be recovered.</em>https://ijcce.ac.ir/article_37127_984db335c8b817a5ed2741f713922e08.pdfIranian Institute of Research and Development in Chemical Industries (IRDCI)-ACECRIranian Journal of Chemistry and Chemical Engineering1021-998638220190401The Electrochemical Behavior of Al Alloys in NaCl Solution in the Presence of Pyrazole Derivative1271383065910.30492/ijcce.2019.30659ENVeselinka GrudicFaculty of Metallurgy and Technology, University of Montenegro, Džordža Vašingtona bb, 81000 Podgorica, MONTENEGROIvana BoskovicFaculty of Metallurgy and Technology, University of Montenegro, Džordža Vašingtona bb, 81000 Podgorica, MONTENEGRODragan RadonjicFaculty of Metallurgy and Technology, University of Montenegro, Džordža Vašingtona bb, 81000 Podgorica, MONTENEGROZeljko JacimovicFaculty of Metallurgy and Technology, University of Montenegro, Džordža Vašingtona bb, 81000 Podgorica, MONTENEGROBojana KnezevicFaculty of Metallurgy and Technology, University of Montenegro, Džordža Vašingtona bb, 81000 Podgorica, MONTENEGROJournal Article20171106<em>This paper studies the corrosion inhibition of Al-Mg alloy system in 0.5 mol/dm<sup>3</sup> NaCl solution in the presence of pyrazole derivative using potentiodynamic polarization and linear polarization method. The inhibition efficiency as a function of concentration and temperature </em><em>was investigated. From the polarization curves, it can be concluded that the pyrazole derivative behaves</em><em> like</em><em> a mixed inhibitor. It has been shown that the efficiency of the inhibitor increases with increasing concentration and with increasing temperature and it indicates a chemisorption process. </em><em>It was concluded that</em><em> the pyrazole derivative adsorbed on the electrode blocks the active surface sites</em><em> and reduces the corrosion rate. The kinetic and thermodynamic parameters of the adsorption process were determined. </em><em>The relatively low efficiency of the inhibitor at room temperature could be </em><em>an indicator</em><em> of increased desorption in the adsorption-desorption equilibrium process. With increasing</em><em> temperature the equilibrium is shifted in the direction of adsorption, causing an increasing inefficiency</em><em>.</em><em> Also, the positive values of equilibrium adsorption constant </em><em>K<sub>ads</sub></em><em> indicate chemisorption of the pyrazole derivative on the alloy surface. </em><em>The values of the activation energy in</em><em> the presence of inhibitor were lower than in the uninhibited solution, which also indicates the chemical </em><em>adsorption. </em><em>Negative values of adsorption free energy ΔG<sub>ads </sub>show that the adsorption process is spontaneous</em><em>.</em>https://ijcce.ac.ir/article_30659_9429168574caf2c84c846055ffe67e7c.pdfIranian Institute of Research and Development in Chemical Industries (IRDCI)-ACECRIranian Journal of Chemistry and Chemical Engineering1021-998638220190401Chemical Constituents and Antioxidant Capacity of Ocimum basilicum and Ocimum sanctum1391523066010.30492/ijcce.2019.30660ENKhairun Fadila SaabanDepartment of Chemistry, Faculty of Science, University of Malaya, 50603 Kuala Lumpur, MALAYSIAChun Hui AngDepartment of Chemistry, Faculty of Science, University of Malaya, 50603 Kuala Lumpur, MALAYSIACheng Hock ChuahDepartment of Chemistry, Faculty of Science, University of Malaya, 50603 Kuala Lumpur, MALAYSIASook Mei KhorDepartment of Chemistry, Faculty of Science, University of Malaya, 50603 Kuala Lumpur, MALAYSIAJournal Article20171109<em>The chemical constituents of leaves, inflorescence, and flowers from Ocimum basilicum (Thai basil) and Ocimum sanctum (Holy basil) were analysed by gas chromatography-mass spectrometry. The chemical compounds were extracted by hydrodistillation, headspace-solid phase microextraction, and solvent extraction. The main constituents of Ocimum basilicum were identified to consist of estragole (> 35.71%), (E)-β-ocimene (> 1.47%), trans-α-bergamotene (> 0.83%), τ-cadinol (> 0.41%) eucalyptol (> 0.25%) and α-caryophyllene (> 0.07%) while Ocimum sanctum consists mainly of eugenol methyl ether (> 34.34%), (E)-caryophyllene (> 7.91%), germacrene D (> 5.58%), β-elemene (> 4.22%) and copaene (> 1.49%). Ocimum basilicum and Ocimum sanctum leaves contain more chemical constituents followed by inflorescence and flowers. The genetic distance between the two species was calculated to investigate the interspecies relationship and it is 2.86. <br /> The calculated genetic distance between the two species showed that Ocimum basilicum and Ocimum sanctum are closely related species and share some of the same traits. The methanol and dichloromethane extracts of Ocimum basilicum leaves showed an IC<sub>50</sub> value of 88 μg/mL and 1178 μg/mL, respectively, while the methanol and dichloromethane extract of Ocimum sanctum showed a higher 2, 2-diphenyl-1-picrylhydrazil free radicals scavenging activities with an IC<sub>50</sub> value of 11 μg/mL and 369 μg/mL, respectively. The natural antioxidant level Ocimum sanctum and Ocimum basilicum indicated that they can be used effectively in food preservation.</em>https://ijcce.ac.ir/article_30660_2eeebe3d46e59494a8dd3a36803a0a00.pdfIranian Institute of Research and Development in Chemical Industries (IRDCI)-ACECRIranian Journal of Chemistry and Chemical Engineering1021-998638220190401Fatty Acid Composition and Mineral Contents of Pea Genotype Seeds1531583324710.30492/ijcce.2019.33247ENRahim AdaDepartment of Field Crops, Agricultural Faculty, Selcuk University, 42075 Konya, TURKEYErcan CeyhanDepartment of Field Crops, Agricultural Faculty, Selcuk University, 42075 Konya, TURKEYŞadiye Ayşe ÇelikDepartment of Field Crops, Agricultural Faculty, Selcuk University, 42075 Konya, TURKEYMustafa HarmankayaDepartment of Soil Science and Plant Fertilization, Faculty of Agriculture, Selcuk University,
42031 Konya, TURKEYMehmet Musa ÖzcanDepartment of Food Engineering, Faculty of Agriculture, University of Selçuk, Konya, TURKEY0000-0002-5024-9512Journal Article20170720<em><span style="font-size: 10.0pt; line-height: 120%; font-family: 'Times New Roman','serif'; mso-fareast-font-family: 'Times New Roman'; mso-ansi-language: EN-US; mso-fareast-language: EN-US; mso-bidi-language: AR-SA;">Metal, non-metal and </span></em><span class="hps"><span style="font-size: 10.0pt; line-height: 120%; font-family: 'Times New Roman','serif'; mso-fareast-font-family: 'Times New Roman'; mso-ansi-language: EN-US; mso-fareast-language: EN-US; mso-bidi-language: AR-SA;">and heavy metal contents of </span></span><em><span style="font-size: 10.0pt; line-height: 120%; font-family: 'Times New Roman','serif'; mso-fareast-font-family: 'Times New Roman'; mso-ansi-language: EN-US; mso-fareast-language: EN-US; mso-bidi-language: AR-SA;">different pea genotype seeds </span><span style="font-size: 10.0pt; line-height: 120%; font-family: 'Times New Roman','serif'; mso-fareast-font-family: Calibri; mso-ansi-language: EN-US; mso-fareast-language: EN-US; mso-bidi-language: AR-SA;">were determined by Inductively Coupled Plasma Atomic Emission Spectrometry (ICP-AES). </span><span style="font-size: 10.0pt; line-height: 120%; font-family: 'Times New Roman','serif'; mso-fareast-font-family: 'Times New Roman'; mso-ansi-language: EN-US; mso-fareast-language: TR; mso-bidi-language: AR-SA;">For all genotypes, significant differences were observed in the mineral contents. Potassium was the most abundant element, ranged from 10146.13 mg/kg (PS3048) to 13171.97 mg/kg (PS3053) (Table 1). In addition, the phosphor content of pea seeds was found between 4004.31 mg/kg (PS 30100) and 5651.27 mg/kg (PS 3057). These pea genotypes contained 1562.32 mg/kg to 2034.28 mg/kg magnesium. Zinc contetns of pea samples changed between 29.66 mg/kg (PS 3055) and 67.81 mg/kg (PS 4053 B).</span><span style="font-size: 10.0pt; line-height: 120%; font-family: 'Times New Roman','serif'; mso-fareast-font-family: 'Times New Roman'; mso-ansi-language: EN-US; mso-fareast-language: EN-US; mso-bidi-language: AR-SA;"> The oil contents of pea samples ranged from 0.84% (PS4053 B) to 3.59% (PS 3055). Oleic acid is predominant fatty acid 12.95% to 45.02% followed by palmitic 13.68% to 77.28%, stearic (1.66% to 15.99%) acids. The highest oleic acid was found in PS3048 genotype (45.02%). The highest palmitic acid was found in PS4021 pea sample (77.28%). The current study contributes to the available information concerning the composition of several pea genotypes grown in Turkey</span><span style="font-size: 10.0pt; line-height: 120%; font-family: 'Times New Roman','serif'; mso-fareast-font-family: Calibri; letter-spacing: -.1pt; mso-ansi-language: EN-US; mso-fareast-language: EN-US; mso-bidi-language: AR-SA;">.</span></em><br /> <strong style="mso-bidi-font-weight: normal;"><span style="font-size: 18.0pt; line-height: 120%;">Fatty Acid Composition and Mineral Contents <br /> of Pea Genotype Seeds</span></strong><br /> https://ijcce.ac.ir/article_33247_454429d65ecc709ed7e9a85cffa873a4.pdfIranian Institute of Research and Development in Chemical Industries (IRDCI)-ACECRIranian Journal of Chemistry and Chemical Engineering1021-998638220190401Survival of Probiotics in Synbiotic Apple Juice During Refrigeration and Subsequent Exposure to Simulated Gastro-Intestinal Conditions1591703078310.30492/ijcce.2019.30783ENAlaleh ZoghiDepartment of Chemical Engineering, Science and Research Branch, Islamic Azad University, Tehran, I.R. IRANKianoush Khosravi-DaraniResearch Department of Food Technology, National Nutrition and food Technology Research Institute,
Faculty of Food and Nutrition Sciences, Shahid Beheshti University of Medical Sciences,
P.O. Box 19395-4741 Tehran, I.R. IRAN0000-0002-0269-6385Sara SohrabvandiResearch Department of Food Technology, National Nutrition and food Technology Research Institute,
Faculty of Food and Nutrition Sciences, Shahid Beheshti University of Medical Sciences,
P.O. Box 19395-4741 Tehran, I.R. IRANHosein AttarDepartment of Chemical Engineering, Science and Research Branch, Islamic Azad University, Tehran, I.R. IRANSayed Abolhasan AlaviDepartment of Chemical Engineering, Science and Research Branch, Islamic Azad University, Tehran, I.R. IRANJournal Article20171104<em>The aim</em><em> of this work was to produce synbiotic apple juice and investigate the survival of Lactobacillus acidophilus and Lactobacillus plantarum in apple juice during the refrigerated storage (4 °C) for 42 days and then the ability of the mentioned probiotic bacteria in gastrointestinal tolerance under gastrointestinal tract conditions, with simulated gastric and bile juices. Eight-treatment combination Plackett-Burman design was used to evaluate the influence of seven variables such as probiotic strain, inoculum size, fructooligosaccharide content, inulin concentration, patulin content, ascorbic and citric acids concentration on the viability of mentioned probiotic strains. The results showed that the survivability of probiotics in apple juice depends significantly (P </em>≤<em> 0.05) on the inoculum size, inulin concentration, kind of probiotic strain, and ascorbic and citric acids’ concentration, respectively. The highest viability was achieved </em><em>by inoculation of 10<sup>8</sup> CFU/mL of Lactobacillus acidophilus ATCC 4356 to the apple juice contaminated</em><em> with 110 µg/L patulin content, containing 2.5% (w/v) inulin, 4 g/L citric acid, and 200 mg/L ascorbic acid. No significant difference was observed in the organoleptic properties of the synbiotic apple juice and the control sample. After sequential incubation in the simulated gastric (2 h) and intestinal juices (pH 7.4, 2 h), the highest number of surviving cells was around 3.5 log (CFU/mL).</em>https://ijcce.ac.ir/article_30783_359de7eba9654a267ec5a238defe494b.pdfIranian Institute of Research and Development in Chemical Industries (IRDCI)-ACECRIranian Journal of Chemistry and Chemical Engineering1021-998638220190401Evaluation of Physicochemical, Sensorial and Microbiological Attributes of Fermented Camel Sausages1711813066510.30492/ijcce.2019.30665ENFaleeha Hasan HusseinBioprocess Engineering Laboratory, Department of Food Science and Engineering, Faculty of Agriculture, University of Tehran, Karaj, I.R. IRANSayed Hadi RazaviBioprocess Engineering Laboratory, Department of Food Science and Engineering, Faculty of Agriculture, University of Tehran, Karaj, I.R. IRANZahra Emam DjomehBioprocess Engineering Laboratory, Department of Food Science and Engineering, Faculty of Agriculture, University of Tehran, Karaj, I.R. IRANJournal Article20170907<em>Probiotic fermented sausages are safe and healthy meat products. Semi-dry fermented sausages were manufactured from camel meat inoculated with Lactobacillus casei and Lactobacillus paracasei and control. All treatments were analyzed for the physico-chemical characteristics (Protein, Moisture, Fat, Ash, Lactic acid value and pH), microbiological features (total aerobic, total mold and yeast and lactic acid bacteria count) and sensory evaluation (color, flavor, texture and overall acceptability) after 0, 10, 20, 30, 40 and 45 days of refrigerated storage at 4°C. The microbial analysis demonstrated the predominance of lactic acid bacteria in semi-dry fermented sausage during the cold storage which reached (8.07) log CFU/g in samples inoculated with Lactobacillus paracasei at 4°C for 45 days. Chemical analysis of semi-dry fermented sausage showed a significant difference (p</em><<em>0.05) in moisture content which decreases in all samples during the period of cold storage. However, all other parameters such as protein, fat, and ash increased. The dropped in pH value in all samples because of producing lactic acid during the fermentation by lactic acid bacteria. Physicochemical, microbial and sensory characteristics of fermented sausage inoculated with Lactobacillus paracaseiare found to be better than other ones. Also, we could preserve the product at 4°C for 45 days. The sensory evaluation has appeared superiority in the semi-dry fermented sausage that had Lactobacillus casei and Lactobacillus paracasei compared with control.</em>https://ijcce.ac.ir/article_30665_d6ca3ba13cb406fe761526883c62bc28.pdfIranian Institute of Research and Development in Chemical Industries (IRDCI)-ACECRIranian Journal of Chemistry and Chemical Engineering1021-998638220190401Fed-Batch Production of a Fermented Beverage Containing Vitamin B121831923079910.30492/ijcce.2019.30799ENKianoush Khosravi-DaraniResearch Department of Food Technology, National Nutrition and food Technology Research Institute,
Faculty of Food and Nutrition Sciences, Shahid Beheshti University of Medical Sciences, Tehran, I.R. IRAN0000-0002-0269-6385Solmaz ZareanDepartment of Food Science and Technology, Faculty of Agriculture, Sari Branch, Islamic Azad University, Sari, I.R. IRANNegin AhmadiDepartment of Food Sciences and Technology, Faculty of Nutrition Sciences and Food Technology,
Shahid Beheshti University of Medical Sciences,Tehran, I.R. IRANZahra HadianResearch Department of Food Technology, National Nutrition and food Technology Research Institute, Faculty of Food and Nutrition Sciences, Shahid Beheshti University of Medical Sciences, I.R. IRAN0000-0003-2065-5680Amir Mohammad MortazavianDepartment of Food Sciences and Technology, Faculty of Nutrition Sciences and Food Technology,
Shahid Beheshti University of Medical Sciences,Tehran, I.R. IRANJournal Article20171106<em>Production of fermented functional foods containing micronutrients is required for their health beneficial properties. The impact of 11 process variables on vitamin B12 production in a dairy beverage containing propionic acid was investigated. Propionibacterium freudenreichii ssp. shermanii was applied in a 3-l fermentor in the fed-batch fermentation system. The most suitable conditions for vitamin B12 production were achieved by 5% v/v inoculum size containing Propionibacterium freudenreichii (without Lactobacillus acidophilus) and continuous feeding of lactose with the rate of 0.04 l/h at 36°C in a medium containing 25 g/L molasses, 10 g/L corn steep liquor, at pH=6.5, after 96 h fermentation. Maximum vitamin concentration (30 mg/L) and productivity (7.5 mg/L.day) were obtained in trial 9. Organoleptic properties of the fermented beverage were also acceptable for panelists and no significant difference was observed between samples and control during 6 days refrigerated storage.</em>https://ijcce.ac.ir/article_30799_22aa99651f85c34eafff24649796d857.pdfIranian Institute of Research and Development in Chemical Industries (IRDCI)-ACECRIranian Journal of Chemistry and Chemical Engineering1021-998638220190401Optimization of Biodiesel Production Using Immobilized Candida Rugosa Lipase on Magnetic Fe3O4-Silica Aerogel1932013436610.30492/ijcce.2019.34366ENLeila AmirkhaniTransport Phenomena Research Center, Faculty of Chemical Engineering, Sahand University of Technology, 51335-1996 Sahand, Tabriz, I. R. IRANDepartment of Chemical Engineering, Ahar Branch, Islamic Azad University, 5451116714 Ahar, I. R. IRANJafarsadegh MoghaddasTransport Phenomena Research Center, Faculty of Chemical Engineering, Sahand University of Technology, 51335-1996 Sahand, Tabriz, I. R. IRANHoda JafarizadehTransport Phenomena Research Center, Faculty of Chemical Engineering, Sahand University of Technology, 51335-1996 Sahand, Tabriz, I. R. IRANJournal Article20171010<em>Hydrophobic magnetic silica aerogel was used as a support to immobilize Candida rugosa lipase by adsorption method. Physical and chemical properties of the support and immobilized lipase were determined by Field Emission Scanning Electron Microscope (FESEM), Brunauer–Emmett–Teller (BET) analysis and Fourier Transform InfraRed (FT-IR) spectroscopy and the results showed that the lipase was successfully immobilized onto the support. Biodiesel production from sunflower oil using immobilized lipase was investigated. Response Surface Methodology (RSM) was employed to evaluate the effect of process variables namely methanol/oil molar ratio (4:1-6:1), enzyme concentration (4-10 % mass fraction of oil) and water concentration (3-10 % mass fraction of oil) on biodiesel yield and predict the optimal reaction conditions. A second-order regression model with a high coefficient determination value (R<sup>2</sup>= 0.99) was fitted to predict the response as a function of reaction parameters. The results indicated that optimum values for methanol/oil molar ratio, enzyme concentration, and water concentration were obtained at 4.5:1, 9.4% and 7.4 %, respectively, in which biodiesel yield was predicted at 72.3%. As the difference between the experimental and predicted values were shown as non-significant, the response surface model employed could be considered as adequate.</em>https://ijcce.ac.ir/article_34366_0729922c29e11478b2d12155b8c15eaf.pdfIranian Institute of Research and Development in Chemical Industries (IRDCI)-ACECRIranian Journal of Chemistry and Chemical Engineering1021-998638220190401Increasing in the Extraction Yield of Environmentally Friendly Antifouling Agent from Pseudomonas Aeruginosa MUT3 by Response Surface Methodology (RSM)2032143712810.30492/ijcce.2019.37128ENHamid MosmeriChemical Engineering-Biotechnology Group, Malek Ashtar University of Technology, Tehran, I.R. IRANAli BahramiChemical Engineering-Biotechnology Group, Malek Ashtar University of Technology, Tehran, I.R. IRANMohamad GhafariMicrobiology Group, Shahed University, Tehran, I.R. IRANKhaled JazaieriPolymer Engineering Group, Amir Kabir University of Technology, Tehran, I.R.Journal Article20160131<em>In the present study, the solvent-solvent extraction of phenazine 1-carboxylic acid (PCA) as an environmentally friendly antifouling agent from pseudomonas aeruginosa MUT3 culture was investigated. Accordingly, after screening the extraction ability of various solvents, </em><em>the combined effects of operating parameters such as solvent type (ethyl acetate, dichloromethane, and</em><em> n-hexane), solvent percent and mixing time on the PCA extraction process were analyzed using response surface methodology (RSM). As a consequence, ethyl acetate showed higher extraction yield (68%) and the optimum condition for PCA extraction were identified as 150% of solvent and 120 min mixing time. Meanwhile, the extraction yields for dichloromethane and n-hexane <br /> were measured by HPLC assay around 48.75 and 25.2%, respectively. The accuracy </em><em>of the obtained model was proved by 99.90% R<sup>2</sup> and 99.84% Adj R<sup>2</sup>. In addition, the disk diffusion test </em><em>showed 9.2, 8 and 7.3 mm inhibition zone for ethyl acetate, dichloromethane and n-hexane, respectively. Consequently, the present study provided a great insight into the solvent-solvent extraction of antibiotics from the fermentation broth.</em>https://ijcce.ac.ir/article_37128_9e5774108b0b530be46fc1136cfbadc5.pdfIranian Institute of Research and Development in Chemical Industries (IRDCI)-ACECRIranian Journal of Chemistry and Chemical Engineering1021-998638220190401Geo-Chemical Exploration of Granite Mining Waste Using XRD, SEM/EDX and AAS Analysis2152283712910.30492/ijcce.2019.37129ENKoteswara Reddy GDepartment of Biotechnology, Koneru Lakshmaiah Education Foundation, Vaddeswaram-522502, A.P, INDIA0000-0003-2266-3692Kiran YarrakulaDepartment of Biotechnology, Koneru Lakshmaiah Education Foundation, Vaddeswaram-522502, A.P, INDIAJournal Article20171215<em>The purpose of the study was to investigate the mineralogical and Heavy Metals (HMs) present in the granite mining soils in Chimakurthy, India. The mineral exploration of mining <br /> soils were identified by X-Ray Diffractometer (XRD) pattern analysis. However, the morphological features and quantitative HMs were detected by Scanning Electron Microscopy/Energy Dispersed Spectroscopy (SEM/EDS). The relative concentrations of HMs measured by Atomic Absorption Spectrometry (AAS). In this study, the major minerals were identified as Quartz, Albite, Anorthite, K-Feldspars, Hornblende, Muscovite, Annite, Lepidolite, Illite, Clintonite, Enstatite, Ferrosilite, Kaolinite, Kyanite, Augite, and Phologopite. Moreover, the presence of six HMs such as Chromium (Cr), Cobalt (Co), Nickel (Ni), Copper (Cu), Zinc (Zn) and Manganese (Mn), and their relative concentrations were measured. The concentrations of HMs in three groups of mining soils were <br /> in the range of Cr: 149-177 mg/kg (>100), for Co: 128-175 mg/kg (>50), for Ni: 166-204 mg/kg (>50), for Cu: 288-363 mg/kg (>100), for Zn: 433-548 mg/kg (>200) and for Mn: 714-769 mg/kg (<2000) as compared with maximum permissible levels set by standard organizations (WHO/FAO) limits. The results demonstrated that the HMs concentrations in mining soils were exceeded WHO/FAO limits except for Mn.</em> <em>The study is useful for assessment of environmental impact due to excessive deposition of mineral waste and assessment of the quality of investigated granites based on their mineralogical aspect, particularly in the production of granite stones</em>.https://ijcce.ac.ir/article_37129_336e81be1a04ac1925994509953f85d2.pdfIranian Institute of Research and Development in Chemical Industries (IRDCI)-ACECRIranian Journal of Chemistry and Chemical Engineering1021-998638220190401Thermodynamic Modeling and Experimental Studies of Bayerite Precipitation from Aluminate Solution: Temperature and pH Effect2292383092610.30492/ijcce.2019.30926ENSomayeh ShayanfarDepartment of Mineral Processing, Faculty of Mining Engineering, Sahand University of Technology,
Tabriz, I.R. IRANValeh AghazadehDepartment of Mineral Processing, Faculty of Mining Engineering, Sahand University of Technology,
Tabriz, I.R. IRANAbdoullah Samiee BeyraghAmirkabir Branch, Iranian Academic Center for Education, Culture, and Research (ACECR),
Tehran, I.R. IRANJournal Article20171214<em>Bayerite is one of the phases of aluminum hydroxide which is precipitated by the carbonation of aluminate solutions obtained from sintered nepheline syenite leaching. In this study, the conditions for the bayerite formation were predicted by thermodynamic modeling of the carbonation process and the Bromley- Zemaitis model was used for this purpose. Carbonation experiments were carried out at pH 11 and the temperature range of 50- 90 °C based on the data obtained from thermodynamic modeling results. XRD analysis of products showed that bayerite was the predominant phase at all temperatures. SEM and LDS analysis indicated that the bayerite precipitates had uniform morphology and bimodal particle size distribution with mean particle size of 4.6 μm at 50 °C to 12.9 μm at 90 °C. It was found that the d<sub>50</sub> increased slowly at the precipitation temperature ranging from 80 to 90 °C, from 12.6 to 12.9 μm and the effect of temperature was on the shape of particles. XRF analysis of the products indicated that the amount of Al<sub>2</sub>O<sub>3</sub> and SiO<sub>2</sub> in the bayerites decrease by increasing the temperature. According to the thermodynamic modeling data and experimental results, the temperature of 80 °C and pH 11 were determined as optimal conditions for bayerite precipitation. </em>https://ijcce.ac.ir/article_30926_cad7462daddfb03655030d88e1b74320.pdfIranian Institute of Research and Development in Chemical Industries (IRDCI)-ACECRIranian Journal of Chemistry and Chemical Engineering1021-998638220190401Vortex and Oil Distribution of Oil-Water Annular Flow through Ball Valve2392523087610.30492/ijcce.2019.30876ENJiang FanSchool of Mechanical and Electric Engineering, Guangzhou University, Guangzhou,
510006, P.R. CHINASijie LiSchool of Mechanical and Electric Engineering, Guangzhou University, Guangzhou,
510006, P.R. CHINAQingfeng WuSchool of Mechanical and Electric Engineering, Guangzhou University, Guangzhou,
510006, P.R. CHINAZhenzhang LiuSchool of Mechanical and Electric Engineering, Guangzhou University, Guangzhou,
510006, P.R. CHINAJournal Article20170731<em>The study on the flow behave inside of a ball valve is important for heavy crude oil transportation. Owe to the fast progress of the numerical technique, it becomes an effective way to observe the flows inside a valve and to analyze the flow structure of the oil-water core annular flow. In the present study, the simulation of the oil-water core annular flowing through the valve is conducted by combined the VOF and CSF model, and the effects of open rate on vortex and oil distribution characteristics are analyzed. The simulated data is a satisfactory match with empirical value and the experimental results. The results show that there are lots of vortexes inside and behind the valve, the coordinate values of the vortex decrease and the aggregation rate increases with an increase in open rate. As the input velocity increases, the change rate of the vortex position is greater, and the oil aggregation rate decreases, the highly viscous oil with has greater aggregation rate after flow through the valve, and the variation of the vortex core position is relatively slow. As the vortex flow across the oil core, the oil will be scattered and contributes to the instability of the annular flow.</em>https://ijcce.ac.ir/article_30876_e5ab90882c4cba38a30ceb8c9f12c425.pdfIranian Institute of Research and Development in Chemical Industries (IRDCI)-ACECRIranian Journal of Chemistry and Chemical Engineering1021-998638220190401Selection of Appropriate Model for the Synthesis of Coal Water Slurry (CWS) Using PVA and TEA2532613385210.30492/ijcce.2019.33852ENNadia KhanPolymer and Petrochemical Engineering Department, NED University of Engineering &Technology, Karachi, PAKISTANSyed Ali Ammar TaqviChemical Engineering Department, Universiti Teknologi PETRONAS (UTP), 32610 Seri Iskandar Perak, MALAYSIA0000-0002-4401-4493Hamza Bin RafiqPolymer and Petrochemical Engineering Department, NED University of Engineering &Technology, Karachi, PAKISTANAsra NafeesPolymer and Petrochemical Engineering Department, NED University of Engineering &Technology, Karachi, PAKISTANHaslinda ZabiriChemical Engineering Department, Universiti Teknologi PETRONAS (UTP), 32610 Seri Iskandar Perak, MALAYSIAJournal Article20180708<em><span>Coal-Water Slurry (CWS) is an attractive alternative fuel with lower cost and reliable</span><span> in terms of transportation and handling. The efficiency of CWS gasification depends on the preparation of CWS to ensure the higher carbon contents and low viscosity which will enhance </span><span>the heating rates along with the atomization of CWS. In this paper, the rheology of CWS was studied</span><span>with coal loading 30 to 60% and the rheological behavior was discussed with the help of Power-law</span><span>, Casson and Herschel Buckley models which shows that CWS exhibits pseudo-plastic (shear thinning) behavior. The CWS was prepared by using Poly-Vinyl Alcohol (PVA) and Triethanol Amine (TEA) as dispersants and Xanthan gum as a stabilizer. The experimental results showed that for a constant coal loading viscosity decreases as the shear rate increases and out of these rheological models, power-law fits best on the experimental data with the highest R<sup>2</sup> of 0.99</span></em>https://ijcce.ac.ir/article_33852_9ec48242609a00e7b30fa05d1a0113f1.pdf