Abstract
The space velocity had profound and complicated effects on methanol synthesis from CO2/CO/H2 over Cu/ZnO/Al2O3 at 523 K and 3.0MPa. At high space velocities, methanol yields as well as the rate of methanol production increased continuously with increasing CO2 concentration in the feed. Below a certain space velocity, methanol yields and reaction rates showed a maximum at CO2 concentration of 5–10%. Different coverages of surface reaction intermediates on copper appeared to be responsible for this phenomenon. The space velocity that gave the maximal rate of methanol production also depended on the feed composition. Higher space velocity yielded higher rates for CO2/ H2 and the opposite effect was observed for the CO/H2 feed. For CO2/CO/H2 feed, an optimal space velocity existed for obtaining the maximal rate.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
Arakawa, H., Dubois, J.-L. and Sayama, K., “Selective Conversion of CO2 to Methanol by Catalytic Hydrogenation over Promoted Copper Catalyst,”Energy Convers. Mgmt.,33, 521 (1992).
Bailey, S., Froment, G. F., Snoeck, J.W. and Waugh, K. C., “A DRIFTS Study of the Morphology and Surface Adsorbate Composition of an Operation Methanol Synthesis Catalysts,”Catal. Lett.,30, 99 (1995).
Bart, J. C. and Sneeden, R. P. A., “Copper-Zinc Oxides-Alumina Methanol Catalysis Revisited,”Catal. Today,2, 1 (1987).
Bowker, M., Hadden, R. A., Houghton, H., Hyland, J. N. K. and Waugh, K. C., “The Mechanism of Methanol Synthesis on Copper/ Zinc Oxide/Alumina Catalysts,”J. Catal.,109, 263 (1988).
Chinchen, G. C., Denny, P. J., Parker, D. G., Spencer, M. S. and Whan, D. A., “Mechanism of Methanol Synthesis from CO2/ CO/H2 Mixtures over Copper/Zinc Oxide/Alumina Catalysts: Use of 14C-labelled Reactants,”Appl. Catal.,30, 333 (1987).
Chinchen, G. C., Hay, H. D., Vandervell, H. D. and Waugh, K. C., “The Measurement of Copper Surface Areas by Reactive Frontal Chromatography,”J. Catal.,103, 79 (1987).
Chinchen, G. C., Spencer, M. S., Waugh, K. C. and Whan, D. A., ”Promotion of Methanol Synthesis and the Water-Gas Shift Reaction by Adsorbed Oxygen on Supported Copper Catalysis,”J. Chem. Soc., Faraday Trans. 1,83, 2193 (1987).
Fujitani, T., Saito, M., Kanai, Y., Kakumoto, T., Watanabe, T., Nakamura, J. and Uchijima, T., “The Role of Metal Oxides in Promoting a Copper Catalyst for Methanol Synthesis,”Catal. Lett.,25, 271 (1994).
Herman, R. G., Klier, K., Simmons, G.W., Finn, B. P., Bulko, J. B. and Kobylinski, T. P., “Catalytic Synthesis of Methanol from CO/H2,”J. Catal.,56, 407 (1979).
Klier, K., Chatikavaij, V., Herman, R. G. and Simmons, G.W., “Catalytic Synthesis of Methanol from CO/H2,”J. Catal.,74, 343 (1982).
Lee, J. S., Lee, K. H., Lee, S. Y. and Kim, Y. G., “A Comparative Study of Methanol Synthesis from CO2/H2 and CO/H2 over a Cu/ZnO/Al2O3 Catalyt,”J. Catal.,144, 414 (1993).
Lee, J. S., Moon, K. I., Lee, S. H., Lee, S. Y. and Kim, Y. G., “Modified Cu/ZnO/Al2O3 Catalysts for Methanol Synthesis from CO2/ H2 and CO/H2,”Catal. Lett.,34, 93 (1995).
Liu, G., Willcox, D., Garland, M. and Kung, H. H., “The Rate of Methanol Production on a Copper-Zinc Oxide Catalyst: The Dependence on the Feed Composition,”J. Catal.,90, 139 (1984).
Mizuno, K. and Misono, M., “Assessment of Catalytic Technology for the Reduction of CO2 and Other Greenhouse Gases,” Proc. Int.’l Symp. Chem. Fixation of Carbon Dioxide, Nagoya, Japan, 237 (1991).
Muhler, M., Törnquist, E., Nielsen, L. P., Clausen, B. S. and Topsoe, H., “On the Role of Adsorbed Atomic Oxygen and CO2 in Copper Based Methanol Synthesis Catalysts,”Catal. Lett.,25, 1 (1994).
Nonneman, L. E. Y. and Ponec, V., “On the Problem of the Activity in Methanol Synthesis of Supported, Unpromoted Copper Catalysts,”Catal. Lett.,7, 213 (1990).
Okamoto, Y., Konishi, Y., Fukino, K., Imanaka, T., Teranishi, S., in M. J. Phillips, M. Ternan (Editors), “Thermal Stabilities and Catalytic of Molybdenum Carbonyls Encaged in a Zeolite and Preparation of Molybdenum Sulfide Catalysts,” Proceeding 9th International Congress on Catalysis, Calgary, 1988, Vol. 5, The Chemical Institute of Canada, Ottawa, 159 (1988).
Rootsaert, W. J.M. and Sachtler, W.M. H.,Z. Phys. Chem. N.F.,26, 16 (1960).
Sheffer, G. R. and King, T. S., “Potassium’s Promotional Effect of Unsupported Copper Catalysts for Methanol Synthesis,”J. Catal.,115, 376 (1989).
Szannyi, J. and Goodman, D.W., “Methanol Synthesis on a Cu(100) Catalyst,”Catal. Lett.,10, 383 (1991).
Waugh, K. C., “Methanol Synthesis,”Catal. Today,15, 51 (1992).
Ya Rozovskii, A., “Modern Problems in the Synthesis of Methanol,”Russian Chem. Rev.,58, 41 (1989).
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Lee, J.S., Han, S.H., Kim, H.G. et al. Effects of space velocity on methanol synthesis from Co2/Co/H2 over Cu/ZnO/Al2O3 catalyst. Korean J. Chem. Eng. 17, 332–336 (2000). https://doi.org/10.1007/BF02699049
Received:
Accepted:
Issue Date:
DOI: https://doi.org/10.1007/BF02699049