An in situ high pressure FT-IR study of CO2/H2 interactions with model ZnO/SiO2, Cu/SiO2 and Cu/ZnO/SiO2 methanol synthesis catalysts
Data(s) |
1992
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Resumo |
In situ FT-IR spectroscopy allows the methanol synthesis reaction to be investigated under actual industrial conditions of 503 K and 10 MPa. On Cu/SiO2 catalyst formate species were initially formed which were subsequently hydrogenated to methanol. During the reaction a steady state concentration of formate species persisted on the copper. Additionally, a small quantity of gaseous methane was produced. In contrast, the reaction of CO2 and H2 on ZnO/SiO2 catalyst only resulted in the formation of zinc formate species: no methanol was detected. The interaction of CO2 and H2 with Cu/ZnO/SiO2 catalyst gave formate species on both copper and zinc oxide. Methanol was again formed by the hydrogenation of copper formate species. Steady-state concentrations of copper formate existed under actual industrial reaction conditions, and copper formate is the pivotal intermediate for methanol synthesis. Collation of these results with previous data on copper-based methanol synthesis catalysts allowed the formulation of a reaction mechanism |
Identificador | |
Publicador |
Springer Verlag |
Relação |
DOI:10.1007/BF00769666 Millar, Graeme J., Rochester, Colin H., & Waugh, Kenneth C. (1992) An in situ high pressure FT-IR study of CO2/H2 interactions with model ZnO/SiO2, Cu/SiO2 and Cu/ZnO/SiO2 methanol synthesis catalysts. Catalysis Letters, 14(3-4), pp. 289-295. |
Fonte |
School of Chemistry, Physics & Mechanical Engineering; Institute for Future Environments; Science & Engineering Faculty |
Palavras-Chave | #030601 Catalysis and Mechanisms of Reactions #catalyst #methanol synthesis #infrared #formate #high pressure |
Tipo |
Journal Article |