Stability Determination of the Modified Activated Carbon to Adsorb Thiophenic Compounds from Model Diesel Fuel

Document Type: Research Article

Authors

1 Chemical Engineering Faculty, Tarbiat Modares University, P.O. Box 14155-4838 Tehran, I.R. IRAN

2 Department of Chemical and Materials Engineering, Buein Zahra Technical University, Buein Zahra, Qazvin, I.R. IRAN

Abstract

The main objective of this research is stability determination of activated carbon adsorbent at fixed bed adsorption column for desulfurization of diesel fuel by mathematical modeling. This model is based on mass balances. Equations that are the outcome of mass balances are known as the second degree of partial differential equations, and they must be solved together simultaneously to generate appropriate breakthrough curves at the end of the bed. On the other hand, running momentum balance by using some assumptions, lead to the Ergun equation which clearly represents pressure drop through adsorption bed. The mentioned equations have been solved simultaneously in MATLAB software and the solution method was the finite difference. After ensuring the validity of the model, scaling up is done to determine adsorbent stability and quantify its performance in an industrial dimension bed. Then the effective parameters on the bed operation and adsorbent stability were identified. Also, the batch adsorption isotherm experiments were carried out at room temperature to determine the maximum capacity of adsorbent in sulfur compound adsorption. Using capped bottles containing 10 mL solutions which contain dibenzothiphen (DBT) dissolved in n-decane and 0.1 g of activated carbon that were equilibrated for 5 hours. Concentrations of Thiophenic Compound (TC) solutions were 330,462,660,990, and 1,320 mg/L of TC. The experiment method was according to some author’s studies. The fluid velocity and mass transfer resistance for diffusion in adsorbent’s pores are the most important parameters in adsorption bed’s behavior and generating of breakthrough curves. The lowest the fluid velocity, the more time the fluid stays in bed and the bed's efficiency raises in terms of pollutant removal accordingly, as well as bed saturated in a longer time.

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[1] Muzic M., Sertic-Bionda K., Gomzi Z., Podolski S., Telen S., Study of Diesel Fuel Desulfurization by Adsorption, Chemical Engineering Research and Design, 88: 487-495 (2010).

[4] Triantafyllidis K.S., Deliyanni E.A., Desulfurization of Diesel Fuels: Adsorption of 4, 6-DMDBT on Different Origin and Surface Chemistry Nanoporous Activated Carbons, Chemical Engineering Journal, 236: 406-414 (2014).

[5] Bu J., Loh G., Gwie C.G., Dewiyanti S., Tasrif M., Borgna A., Desulfurization of Diesel Fuels by Selective Adsorption on Activated Carbons: Competitive Adsorption of Polycyclic Aromatic Sulfur Heterocycles and Polycyclic Aromatic Hydrocarbons, Chemical Engineering Journal, 166:  207-217 (2011).

[7] Baltzopoulou, Penelope, et al. Diesel Fuel Desulfurization via Adsorption with the Aid of Activated Carbon: Laboratory-and Pilot-Scale Studies, Energy & Fuels, 29(9): 5640-5648 (2015).

[9] Moosavi E.S., Dastgheib S.A., Karimzadeh R., Adsorption of Thiophenic Compounds from Model Diesel Fuel Using Copper and Nickel Impregnated Activated Carbons, Energies, 5: 4233-4250 (2012).

[10] Nekoo S. H., Fatemi S., Experimental Study and Adsorption Modeling of COD Reduction by Activated Carbon for Wastewater Treatment of Oil Refinery, Iranian Journal of Chemistry and Chemical Engineering (IJCCE), 32: 81-89 (2013).

[11] Yusuff A., Popoola L., Omitola O., Adeodu A., Daniyan I., Mathematical Modeling of Fixed Bed Adsorption Column for Liquid Phase Solute: Effect of Operating Variables, International Journal of Scientific & Engineering Research, 4: 811-822 (2013).

[14] Babu B., Gupta S., Modeling and Simulation of Fixed Bed Adsorption Column: Effect of Velocity Variation, i-Manager's Journal on Future Engineering and Technology, 1: 60-      (2005).

[16] Faghihian H., Vafadar M., Tavakoli T., Desulfurization of Gas Oil by Modified Clinoptilolite, Iranian Journal of Chemistry and Chemical Engineering (IJCCE), 26(2): 19-25 (2007).

[17] Bakhtiari G., Bazmi M., Abdouss M., Royaee S.J., Adsorption and Desorption of Sulfur Compounds by Improved Nano Adsorbent: Optimization Using Response Surface Methodology, Iranian Journal of Chemistry and Chemical Engineering (IJCCE), 36(4) 69-79 (2017).

[18] Zhou A., Xiaoliang Ma, Chunshan Song. Effects of Oxidative Modification of Carbon Surface on the Adsorption of Sulfur Compounds in Diesel Fuel, Applied Catalysis B: Environmental, 87(3):190-199 (2009).

[19] Ahmadi Nasab N., Hassani Kumleh H., Kazemzad M., Ghavipanjeh F., Application of Spherical Mesoporous Silica MCM-41 for Adsorption of Dibenzothiophene (A Sulfur Containing Compound) from Model Oil, Iranian Journal of Chemistry and Chemical Engineering (IJCCE), 33(3): 37-42 (2014).

[20] Xu Z., Cai J.-g., Pan B.-c., Mathematically Modeling Fixed-Bed Adsorption in Aqueous Systems, Journal of Zhejiang University SCIENCE A, 14: 155-176 (2013).

[21] Bautista L., Martinez M., Aracil J., Adsorption of α‐Amylase in a Fixed Bed: Operating Efficiency and Kinetic Modeling, AIChE Journal, 49: 2631-2641 (2003).

[22] Shaverdi G., Haghighat F., Ghaly W., Development and Systematic Validation of an Adsorption Filter Model, Building and Environment, 73: 64-74 (2014).

[23] Nwabanne J.T., Igbokwe P.K., Kinetic Modeling of Heavy Metals Adsorption on Fixed Bed Column, International Journal of Environmental Research, 6(4): 945-952 (2012).

[24] Abu‐Lail L., Bergendahl J.A., Thompson R.W., Mathematical Modeling of Chloroform Adsorption onto Fixed‐Bed Columns of Highly Siliceous Granular Zeolites, Environmental Progress & Sustainable Energy, 31(4): 591-596 (2012).

[25] Crittenden J.C., Weber W.J., Predictive Model for Design of Fixed-Bed Adsorbers: Parameter Estimation and Model Development, Journal of the Environmental Engineering Division, 104(2): 185-197 (1978).

[26] McCabe W.L., Smith J.C., Harriott P., “Unit Operations of Chemical Engineering”,Vol. 5: McGraw-Hill, New York, (1993).

[27] Treybal R.E., "Mass-Transfer Operations", McGraw-Hill Book Company, New York (1980).

[28] Perry R.H., Green D.W., “Perry's Chemical Engineers' Handbook”, McGraw-Hill Professional, (1999).

[29] Ruthven D.M., “Principles of Adsorption and Adsorption Processes”, John Wiley & Sons, Inc. (1984).

[30] Ghorai S., Pant K.K., Investigations on the Column Performance of Fluoride Adsorption by Activated Alumina in a Fixed-Bed, Chemical Engineering Journal, 98(1): 165-173 (2004).

[32] Fallah R.N., Azizian S., Removal of Thiophenic Compounds from Liquid Fuel by Different Modified Activated Carbon Cloths, Fuel Processing Technology, 93(1): 45-52 (2012).

[33] Legates D.R., McCabe Jr G.J., Evaluating the Useof Goodness of Fit Measures in Hydrologic and Hydroclimatic Model Validation, J. Water Resour. Res., 35: 233–241 (1999).