Acta Phys. -Chim. Sin. ›› 2001, Vol. 17 ›› Issue (02): 161-164.doi: 10.3866/PKU.WHXB20010214

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H2 or CO Chemsorption on Co-based Catalysts for F-T Synthesis

Chen Jian-Gang;Xiang Hong-Wei;Dong Qing-Nian;Wang Xiu-Zhi;Sun Yu-Han   

  1. The State Key Labortory of Coal Conversion,Institute of Coal Chemistry,Chinese Academy of Sciences,Taiyuan　030001
  • Received:2000-06-12 Revised:2000-10-13 Published:2001-02-15
  • Contact: Xiang Hong-Wei E-mail:hwxiang@ms.sxicc.ac.cn

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Abstract: Both Co/SiO2 and Co/ZrO2/SiO2 catalysts for FT synthesis were characterized by temperature programmed desorption (TPD) and FTIR spectra.H2TPD evidenced that there were two H2 desorption peaks over Co/SiO2 catalyst and that the amount of H2 adsorption decreased upon introduction of ZrO2.COTPD and COIR showed that addition of ZrO2 weakened the intensity of CO adsorption but increased the amount of adsorbed CO.In FT synthesis,ZrO2 promoter enhanced the formation of heavy hydrocarbons in addition to keeping high activity.Such a shift of product array to heavier hydrocarbon was related to the increase of surface H2/CO ratio.

Key words: F-T synthesis, Co-based catalysts, ZrO2 promoter, Surface adsorption, FT-IR spectra