Promotion of lanthanum-supported cobalt-based catalysts for the Fischer-Tropsch reaction

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• 作者：Cathy Brabant^a ; ^b ; Andrei Khodakov^a ; ^b ; Anne Griboval-Constant^a ; ^b ; ^{anne.griboval@univ-lille1.fr}
• 关键词：Fischer&ndash ; Tropsch synthesis ; Cobalt catalyst ; Lanthanum
• 刊名：Comptes Rendus Chimie
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：20
• 期：1
• 页码：40-46
• 全文大小：1227 K
• 卷排序：20

文摘

This paper focuses on the effect of the La/Co ratio on the structure of alumina cobalt supported catalysts for Fischer–Tropsch synthesis. Catalysts are prepared by wetness impregnation of alumina followed by calcination in air. The catalysts contain 10 wt% of cobalt and between 0 and 20 wt% of La (0, 5, 10, 15, 20). The catalysts were activated by reduction in hydrogen at 673 K and the catalytic performance was evaluated in a fixed bed reactor at 20 bar and 493 K. A wide range of techniques (BET, XRD, TPR, and XPS) were used for catalyst characterization at each preparation step and showed strong impact of the La/Co ratio on the structure, reducibility of supported cobalt phases. It was shown that 10 wt% of lanthanum allows reducing cobalt aluminate and improving catalytic performances.