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ISSN Imprimir: 2572-9896
ISSN On-line: 2572-990X
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KINETICS OF REVERSE WATER-GAS SHIFT REACTION OVER CuO/ZnO/Al2O3 CATALYST
RESUMO
The reverse water-gas shift (RWGS) is a candidate technique for the production of carbon monoxide (CO), which could be further hydrogenated to methanol. In this work, the kinetics of the RWGS reaction were investigated using a commercial CuO/ZnO/Al2O3 catalyst. Activity trials were performed in a fixed-bed flow reactor at 0.1 MPa in the 513-533 K range by feeding a mixture of hydrogen (H2) and carbon dioxide (CO2) in the 1-4 mol/mol range. The space time was varied, in the 0.04-0.11 g h/L range. The reactor was operated as a differential plug flow reactor (CO2 conversion < 10%). From the temperature dependence of the reaction rates, the activation energy value was found to be equal to 72.4 kJ/mol. The associative and surface redox mechanisms were considered to describe the CO formation pathway, and the latter appeared dominant over the CuO/ZnO/Al2O3 catalyst.
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Ayastuy, J.L., Gutierrez-Ortiz, M.A., Gonzalez-Marcos, J.A., Aranzabal, A., and Gonzalez-Velasco, J.R., Kinetics of the Low-Temperature WGS Reaction over a CuO/ZnO/Al2O3 Catalyst, Ind. Eng. Chem. Res., vol. 44, pp. 41-50, 2005.
-
Centi, G., Cum, G., Fierro, J.L.G., and Lopez Nieto, J.M., Direct Conversion of Methane, Ethane and Carbon Dioxide to Fuels and Chemicals, CAP Report, The Catalyst Group Resources, 2008.
-
Centi, G., and Perathoner, S., Opportunities and Prospects in the Chemical Recycling of Carbon Dioxide to Fuels, Catal. Today, vol. 148, pp. 191-205,2009.
-
Chen, C.S. and Cheng, W.H., Study on the Mechanism of CO Formation in Reverse Water Gas Shift Reaction over Cu/SiO2 Catalyst by Pulse Reaction, TPD and TPR, Catal. Lett., vol. 83, pp. 121-126,2002.
-
Chen, C.S., Cheng, W.H., and Lin, S.S., Mechanism of CO Formation in Reverse Water-Gas Shift Reaction over Cu/Al2O3 Catalyst, Catal. Lett., vol. 68, pp. 45-48,2000.
-
Ernst, K.H., Campbell, C.T., and Moretti, G., Kinetics of the Reverse Water-Gas Shift Reaction over Cu(110), J. Catal, vol. 134, pp. 66-74,1992.
-
Fujita, S.I., Usui, M., and Takezawa, N., Mechanism of the Reverse Water Gas Shift Reaction over Cu/ZnO Catalyst, J. Catal., vol. 134, pp. 220-225,1992.
-
Gines, M.J.L., Marchi, A.J., and Apesteguia, C.R., Kinetic Study of the Reverse Water-Gas Shift Reaction over CuO/ZnO/Al2O3 Catalysts, Appl. Catal, A, vol. 154, pp. 155-171,1997.
-
Goguet, A., Shekhtman, S.O., Burch, R., Hardacre, C., Meunier, F.C., and Yablonsky, G.S., Pulse-Response TAP Studies of the Reverse Water-Gas Shift Reaction over a Pt/CeO2 Catalyst, J. Catal., vol. 237, pp. 102-110,2006.
-
Jadhav, S.G., Vaidya, P.D., Bhanage, B.M., and Joshi, J.B., Kinetics of Reverse Water Gas Shift Reaction over Pt/Al2O3 Catalyst, Can. J. Chem. Eng., vol. 94, pp. 101-106,2015.
-
Joo, O.S. and Jung, K.D., Stability of ZnAl2O4 Catalyst for Reverse-Water-Gas-Shift Reaction (RWGSR), Bull. Korean Chem. Soc., vol. 24, pp. 86-90,2003.
-
Joo, O.S., Jung, K.D., Han, S.H., Uhm, S.J., Lee, D.K., and Ihm, S.K., Migration and Reduction of Formate to Form Methanol on CuZnO Catalysts, Appl. Catal, A, vol. 135, pp. 273-286,1996.
-
Joo, O.S., Jung, K.D., Moon, I., Rozovskii, A.Y., Lin, G.I., Han, S.H., and Uhm, S.J., Carbon Dioxide Hydrogenation to Form Methanol via a Reverse-Water-Gas-Shift Reaction (the CAMERE Process), Ind. Eng. Chem. Res., vol. 38, pp. 1808-1812,1999.
-
Jun, K.W., Shen, W.J., Rama Rao, K.S., and Lee, K.W., Residual Sodium Effect on the Catalytic Activity of Cu/ZnO/Al2O3 in Methanol Synthesis from CO2 Hydrogenation, Appl. Catal., A, vol. 174, pp. 231-238,1998.
-
Kim, S.S., Lee, H.H., and Hong, S.C., A Study on the Effect of Support's Reducibility on the Reverse Water-Gas Shift Reaction over Pt Catalysts, Appl. Catal, A, vols. 423-424, pp. 100-107,2012.
-
Rotaru, P., Kinetics and Mechanism of Reverse Water-Gas Shift Reaction on a Cu-ZnO-Al2O3 Catalyst, J. Indian Chem. Soc., vol. 78, pp. 352-359,2001.
-
Shido, T. and Iwasawa, Y., The Effect of Coadsorbates in Reverse Water-Gas Shift Reaction on ZnO, in Relation to Reactant- Promoted Reaction Mechanism, J. Catal., vol. 140, pp. 575-584,1993.
-
Spencer, M.S., On the Activation Energies of the Forward and Reverse Water-Gas Shift Reaction, Catal. Lett., vol. 32, pp. 9-13, 1995.
-
Stirling, D., Stone, F.S., and Spencer, M.S., Catalytic Activity of Reduced CuxZn(1-x)O and CuO/CuxZn(1-x)O in CO2/H2 Reactions, Stud. Surf. Sci. Catal, vol. 75, pp. 1507-1518,1993.
-
Stone, F.S. and Waller, D., Cu-ZnO and Cu-ZnO/Al2O3 Catalysts for the Reverse Water-Gas Shift Reaction. The Effect of the Cu/Zn Ratio on Precursor Characteristics and on the Activity of the Derived Catalysts, Top. Catal, vol. 22, pp. 305-318,2003.
-
Sun, Q., Liu, C.W., Pan, W., Zhu, Q.M., and Deng, J.F., In Situ IR Studies on the Mechanism of Methanol Synthesis over an Ultrafine Cu/ZnO/Al2O3 Catalyst, Appl. Catal, A, vol. 171, pp. 301-308,1998.
-
van Herwijnen, T. and de Jong, W.A., Kinetics and Mechanism of the CO Shift on CuZnO: 1. Kinetics of the Forward and Reverse CO Shift Reactions, J. Catal, vol. 63, pp. 83-93,1980.
-
Waller, D., Stirling, D., Stone, F.S., and Spencer, M.S., Copper-Zinc Oxide Catalysts. Activity in Relation to Precursor Structure and Morphology, Faraday Discuss. Chem. Soc., vol. 87, pp. 107-120,1989.
-
Yang, J.I., Park, J.H., and Kim, J.N., Kinetic Study of the Reverse Water-Gas Shift Reaction over CuO/ZnO/Al2O3 Catalyst at Low Temperature, HwahakKonghak, vol. 41, pp. 558-563,2003.
-
Zhu, M., Ge, Q., and Zhu, X., Catalytic Reduction of CO2 to CO via Reverse Water Gas Shift Reaction: Recent Advances in the Design of Active and Selective Supported Metal Catalysts, Transact. Tianjin Univ., vol. 26,pp. 172-187,2020.
-
Bhattacharyya Sohini, Roy Soumyabrata, Ajayan P. M., An Overview of Catalytic CO2 Conversion, in Energy Transition: Climate Action and Circularity, 1412, 2022. Crossref