Effect of vanadium promotion on activated carbon-supported cobalt catalysts in Fischer-Tropsch synthesis

• Published in: Catalysis letters Vol. 107; no. 1-2; pp. 47 - 52
• Main Authors: Wang, Tao, Ding, Yunjie, Xiong, Jianmin, Yan, Li, Zhu, Hejun, Lu, Yuan, Lin, Liwu
• Format: Journal Article
• Language: English
• Published: Dordrecht Springer 01.02.2006; Springer Nature B.V
• Subjects: Activated carbon; Adsorbents; Catalysis; Catalysts; Chemical synthesis; Chemistry; Cobalt; Exact sciences and technology; Fischer-Tropsch process; General and physical chemistry; Hydrocarbons; Organic chemistry; Promotion; Selectivity; Surface physical chemistry; Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry; Vanadium; Heterogeneous catalysis; Fischer-Tropsch synthesis; Activated carbon; AC-supported Co catalyst; vanadium promotion; Fischer Tropsch synthesis; Vanadium; Fischer Tropsch catalyst; Transition metal; Cobalt; Supported catalyst; Catalyst support
• ISSN: 1011-372X; 1572-879X
• DOI: 10.1007/s10562-005-9730-1

The effect of vanadium promotion on activated carbon (AC)-supported cobalt catalysts in Fischer–Tropsch synthesis has been studied by means of XRD, TPR, CO-TPD, H2-TPSR of chemisorbed CO and F-T reaction. It was found that the CO conversion could be significantly increased from 38.9 to 87.4% when 4 wt.% V was added into Co/AC catalyst. Small amount of vanadium promoter could improve the selectivity toward C10–C20 fraction and suppress the formation of light hydrocarbon. The results of CO-TPD and H2-TPSR of adsorbed CO showed that the addition of vanadium increased the concentration of surface-active carbon species by enhancing CO dissociation and further improved the selectivity of long chain hydrocarbons. However, excess of vanadium increased methane selectivity and decreased C5+ selectivity.