期刊
CATALYSIS LETTERS
卷 126, 期 1-2, 页码 100-105出版社
SPRINGER
DOI: 10.1007/s10562-008-9587-1
关键词
MgO-Al(2)O(3) mixed oxides; Spinel; Water-gas shift; Co-Mo-based catalysts
资金
- Fujian Province Science and Technology Project
- Xiamen Municipal Science and Technology Project
MgO-Al(2)O(3) mixed oxides were prepared and used as the support of Co-Mo-based water-gas shift reaction (WGSR) catalysts. X-ray diffraction (XRD) characterization showed that the MgO-Al(2)O(3) mixed oxides support is composed of MgO, gamma-Al(2)O(3), and magnesia-alumina spinel. The MgO-Al(2)O(3) mixed oxides-supported Co-Mo-based catalysts exhibited high shift activity at high temperature (360-450 degrees C) and high stability. The addition of potassium enhanced the activities but affected adversely the stabilities of Co-Mo-based catalysts. ESR characterization shows that the Mo(5+) species are not connected with the WGSR activity. Magnesium in the support may be closely related with the formation of formate species intermediate for the WGSR.
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