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Intrinsic Kinetics of Methanol Dehydration over Al2O3 Catalyst
Abstract:Dehydration of methanol to dimethyl ether (DME) over a commercial Al2O3 catalyst was studied in an isothermal integral fixed bed reactor. The experiments were performed on the temperature interval 513-613 K, liquid hourly space velocity (LHSV) of 0.9-2.1h-1, pressures between 0.1 and 1.0 MPa. The effect of different operation conditions on the dehydration of methanol was investigated in a laboratory scale experiment. A new intrinsic kinetics equation based on the mechanism of Langmuir-Hinshelwood dissociation adsorption was developed for the dehydration reaction by fitting the expressions to the experimental data. An activation energy of 67.21 kJ/mol was obtained for the catalyst with the best performance. Statistic test showed that this new intrinsic kinetics equation was acceptable.
Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1075625Procedia APA BibTeX Chicago EndNote Harvard JSON MLA RIS XML ISO 690 PDF Downloads 4443
 Y. Y. Zhu, S. R. Wang, X. L. Ge, Q. Liu, Z. Y. Luo, K. F. Cen, "Experimental study of improved two step synthesis for DME production," Fuel Process. Tech., pp. 424-429, 2010.
 A. Khaleel, "Methanol dehydration to dimethyl ether over highly porous xerogel alumina catalyst: Flow rate effect," Fuel Process. Tech., 2010.
 K. Mads, J. Finn, C. Roberta, C. Jamal and S. P. Gregory, "MeOH to DME in bubbling fluidized bed: experimental and modeling," The Canadian journal of chemical engineering, vol. 89, pp. 274-283, 2011.
 D. Kallo, Knozinger, H. Zur, "Dehydratisierung von alkoholen an aliminiumoksid, " Chem. Ing.Tech., vol. 39, pp. 676-680, 1967.
 F. Figueras, A. Nohl, L. Mourgues, Y. Trambouze, "Dehydration of methanol and tert-Butyl alcohol on silica-alumina," Trans. Faraday Soc., vol. 67, pp. 1155-1163, 1971.
 K. Klusacek, P. Schneider, "Stationary catalytic kinetics via surface concentrations from transient data methanol dehydration," Chem. Eng. Sci., vol. 37, pp. 1523-1528, 1982.
 G. Bercic, J. Levec, "Intrinsic and global reaction rate of methanol dehydration over ╬│-A12O3 Pellets," Ind. Eng. Chem. Res., vol. 31, pp. 1035-1040, 1992.
 W. Z. Lu, L. H. Teng, W. D. Xiao, "Simulation and experiment study of dimethyl ether synthesis from syngas in a fluidized-bed reactor," Chem. Eng. Sci., vol. 59, pp. 5455-5464, 2004.
 M. Mollavali, F. Yaripour, H. Atashi, S. Sahebdelfar, "Intrinsic kinetics study of dimethyl ether synthesis from methanol on ╬│-Al2O3 catalysts," Ind. Eng. Chem. Res., vol. 47, no. 9, pp. 3265-3273, 2008.
 E. Gerhard, reactions at solid surfaces. New Jersey: John Wiley & Sons, Inc. Press, 2009.
 P. Grigore, B. Grigore, G. Rodica, N. Natalia, "Methanol conversion to dimethyl ether over H-SAPO-34 catalyst," Ind. Eng. Chem. Res., vol. 48, no. 15, pp. 7065-7071, 2009.
 G. Schmitz, "Deshydration du Methanol Sur Silice-Alumine, " Chim. Phys., vol. 74, pp. 650-655, 1978.
 B, Solange, V. S. Rutger, "Theoretical Study of the Mechanism of Surface Methoxy and Dimethyl Ether Formation from Methanol Catalyzed by Zeolitic Protons," J. Phys. Chem., vol. 101, pp. 2292, 1997.