能源化学(英文) ›› 2016, Vol. 25 ›› Issue (6): 994-1000.DOI: 10.1016/j.jechem.2016.09.008

• ARTICLES • 上一篇    下一篇

Fischer-Tropsch synthesis on impregnated cobalt-based catalysts:New insights into the effect of impregnation solutions and pH value

Chuang Xinga, Peipei Aib, Peipei Zhangb, Xinhua Gaob, Ruiqin Yangb, Noriyuki Yamanee, Jian Sunc, Prasert Reubroycharoend, Noritatsu Tsubakia,b   

  1. a School of Biological and Chemical Engineering, Zhejiang University of Science and Technology, Hangzhou 310023, Zhejiang, China;
    b Department of Applied Chemistry, Graduate School of Engineering, University of Toyama, Toyama 9308555, Japan;
    c Dalian National Laboratory for Clean Energy(DNL), Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, Liaoning, China;
    d Department of Chemical Technology, Faculty of Science, Chulalongkorn University, Bangkok 10330, Thailand;
    e Advanced Technology Research 20-1 Laboratories, Nippon Steel & Sumitomo Metal Corporation, Futtsu 2938511, Japan
  • 收稿日期:2016-07-19 修回日期:2016-09-03 出版日期:2016-11-15 发布日期:2016-09-30
  • 通讯作者: Jian Sun, Prasert Reubroycharoen, Noritatsu Tsubaki
  • 基金资助:

    The authors acknowledge the financial support from the National Natural Science Foundation of China (21528302) and Zhejiang Province Natural Science Foundation (LQ15B060004).

Fischer-Tropsch synthesis on impregnated cobalt-based catalysts:New insights into the effect of impregnation solutions and pH value

Chuang Xinga, Peipei Aib, Peipei Zhangb, Xinhua Gaob, Ruiqin Yangb, Noriyuki Yamanee, Jian Sunc, Prasert Reubroycharoend, Noritatsu Tsubakia,b   

  1. a School of Biological and Chemical Engineering, Zhejiang University of Science and Technology, Hangzhou 310023, Zhejiang, China;
    b Department of Applied Chemistry, Graduate School of Engineering, University of Toyama, Toyama 9308555, Japan;
    c Dalian National Laboratory for Clean Energy(DNL), Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, Liaoning, China;
    d Department of Chemical Technology, Faculty of Science, Chulalongkorn University, Bangkok 10330, Thailand;
    e Advanced Technology Research 20-1 Laboratories, Nippon Steel & Sumitomo Metal Corporation, Futtsu 2938511, Japan
  • Received:2016-07-19 Revised:2016-09-03 Online:2016-11-15 Published:2016-09-30
  • Contact: Jian Sun, Prasert Reubroycharoen, Noritatsu Tsubaki
  • Supported by:

    The authors acknowledge the financial support from the National Natural Science Foundation of China (21528302) and Zhejiang Province Natural Science Foundation (LQ15B060004).

摘要: The Co-based catalysts were prepared with different cobalt acetate solutions. Effects of pH value were studied deeply on Fischer-Tropsch synthesis (FTS) through a semi-batch reactor. Among all impregnation solutions (water, butanol, amyl alcohol, acetic acid, nitric acid and ammonium nitrate), the catalyst prepared by NH4NO3 solution showed the highest catalytic activity due to its small particle size and high reduction degree. However, the catalyst with the smallest particle size derived from water as impregnation solution exhibited low activity as well as high methane selectivity since it was difficult to be reduced and inactive in FTS. According to FT-IR spectra results, the low intensity of absorbed CO on the catalyst prepared from water solution resulted in low FTS activity. Whereas, the high activity of catalysts prepared from NH4NO3 solution could be explained by the high intensity of absorbed CO on the catalysts. The cobalt species on the catalysts prepared under lower pH conditions exhibited smaller particle size distribution as well as lower CO conversion than those prepared at higher pH value.

关键词: Fischer-Tropsch synthesis, Co catalyst, pH value, Impregnation solution

Abstract: The Co-based catalysts were prepared with different cobalt acetate solutions. Effects of pH value were studied deeply on Fischer-Tropsch synthesis (FTS) through a semi-batch reactor. Among all impregnation solutions (water, butanol, amyl alcohol, acetic acid, nitric acid and ammonium nitrate), the catalyst prepared by NH4NO3 solution showed the highest catalytic activity due to its small particle size and high reduction degree. However, the catalyst with the smallest particle size derived from water as impregnation solution exhibited low activity as well as high methane selectivity since it was difficult to be reduced and inactive in FTS. According to FT-IR spectra results, the low intensity of absorbed CO on the catalyst prepared from water solution resulted in low FTS activity. Whereas, the high activity of catalysts prepared from NH4NO3 solution could be explained by the high intensity of absorbed CO on the catalysts. The cobalt species on the catalysts prepared under lower pH conditions exhibited smaller particle size distribution as well as lower CO conversion than those prepared at higher pH value.

Key words: Fischer-Tropsch synthesis, Co catalyst, pH value, Impregnation solution