Promotion effect of single or mixed rare earths on cobalt-based catalysts for Fischer-Tropsch synthesis

作者：Zeng, Shanghong; Du, Yong; Su, Haiquan^*; Zhang, Yulong

来源：Catalysis Communications, 2011, 13(1): 6-9.

DOI：10.1016/j.catcom.2011.06.009

• Rare earth
• Promotion
• Cobalt-based catalyst
• Fischer-Tropsch synthesis

A series of Co/gamma-Al(2)O(3) catalysts promoted with single or mixed rare earths were synthesized by impregnation method, and characterized via XRD, TPR, TPD, O(2) titration and N(2) adsorption-desorption techniques. The results showed that lanthanum, cerium, praseodymium and samarium played positive role on decreasing the production rate of methane, carbon dioxide, C(2)-C(4) products and increasing C(5)(+) selectivity, but neodymium had an opposite effect on the Co/gamma-Al(2)O(3) catalysts. In addition, the promotion with appropriate mixed rare earths was favorable for generating long-chain hydrocarbons over the Co/gamma-Al(2)O(3) catalyst, and the catalyst promoted with the Nd-removed mixed rare earths presented best catalytic performance.

• 出版日期2011-10-5
• 单位内蒙古大学