Acta Phys. -Chim. Sin. ›› 2014, Vol. 30 ›› Issue (9): 1745-1751.doi: 10.3866/PKU.WHXB201405301

• CATALYSIS AND SURFACE SCIENCE • Previous Articles     Next Articles

Effect of Trace Amounts of Li Doping on Performance of Co/AC Catalysts for Syntheses of Mixed Linear α-Alcohols

DONG Wen-Da1,3, ZHU He-Jun1, DING Yun-Jie1,2, PEI Yan-Peng1,3, DU Hong1,3, WANG Tao1   

  1. 1. Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, Liaoning Province, P. R. China;
    2. State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, Liaoning Province, P. R. China;
    3. University of Chinese Academy of Sciences, Beijing 100049, P. R. China
  • Received:2014-03-31 Revised:2014-05-29 Published:2014-08-29
  • Contact: DING Yun-Jie E-mail:dyj@dicp.ac.cn
  • Supported by:

    The project was supported by the National Natural Science Foundation of China (20973167).

Abstract:

15CoxLi/AC catalysts promoted by different trace amounts of Li doping were prepared by incipientwetness impregnation. The catalysts were investigated by means of CO hydrogenation and characterized by X-ray diffraction (XRD), temperature-programmed reduction (H2-TPR), and temperature-programmed surface reaction (TPSR) techniques. The results show that CO conversion, selectivity towards C5+ hydrocarbons, selectivity towards mixed linear α-alcohols and the distribution of higher alcohols (C6+OH) in the alcohol products were improved by adding trace amounts of Li to the 15Co/AC catalysts. XRD, H2-TPR, and TPSR results indicate that the existence of trace amounts of Li promotes weak interaction between Li and Co species, disperses the Co species of the catalysts, decreases the size of metallic Co particles, and promotes the formation of Co2C species.

Key words: Syngas, Mixed linear α-alcohols, Co/AC catalyst, Trace amounts of Li doping, Co2C species

MSC2000: 

  • O643