Iron-Based Water Gas Shift Catalyst
AssigneeSud-Chemie AG
InventorsChao Chen, Eshan Li, Yanxia Wang, Yeping Cai, Chandra Ratnasamy, Jeffery E. Riley, Xueqin J. Wang, Shizhong Zhao, Jurgen R. Ladebeck
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Abstract
The present development is a catalyst for use in water gas shift processes, a method for making the catalyst and a method of using the catalyst. The catalyst is composed of iron oxide, copper oxide, zinc oxide, alumina, and optionally, potassium oxide, and is produced using a hydrothermal synthesis process. The catalyst demonstrates surprising activity for conversion of carbon monoxide under high to moderate temperature shift reaction conditions.
Claims21
A catalyst consisting essentially of from 0.5 wt % to 15 wt % CuO, from 0.1 wt % to 15 wt % ZnO, from 0.5 wt % to 10 wt % Al2O3, and optionally, up to 5 wt % K2O, with Fe2O3 to balance.
A catalyst comprising from 0.5 wt % to 15 wt % CuO, from 0.1 wt % to 15 wt % ZnO, from 0.5 wt % to 10 wt % Al2O3, and optionally, up to 5 wt % K2O, with Fe2O3 to balance, wherein said catalyst is characterized by an absence of zinc-aluminum spinel and said catalyst is prepared without the use of chromium-containing raw materials.
A catalyst comprising copper oxide, zinc oxide, alumina, iron oxide, and optionally potassium oxide, prepared by the steps:
- (a) preparing a first solution comprising salts of iron compounds, copper compounds, zinc compounds and aluminum compounds, and by preparing a second solution comprising an aqueous base solution, wherein neither said first solution nor said second solution comprise chromium-based raw materials;
- (b) combining the first and second solutions with deionized water in a mix tank while maintaining the pH;
- (c) holding the mixture for a predetermined time period;
- then heating the mixture and holding the mixture at an elevated temperature until solids form;
- (d) washing the solids;
- (e) optionally adding potassium compounds,
- (f) drying the washed solids;
- and
- (g) calcining the dried solids to make the catalyst.
Dependencies are inferred from the claim text.