SCI和EI收录∣中国化工学会会刊

Chinese Journal of Chemical Engineering ›› 2019, Vol. 27 ›› Issue (12): 2960-2967.DOI: 10.1016/j.cjche.2019.03.008

• Catalysis, kinetics and reaction engineering • Previous Articles     Next Articles

The nature of the deactivation of hydrothermally stable Ni/SiO2-Al2O3 catalyst in long-time aqueous phase hydrogenation of crude 1,4-butanediol

Haitao Li1, Yin Zhang1, Hongxi Zhang1, Xiaoqin Qin1, Yalin Xu1, Ruifang Wu1, Zheng Jiang2, Yongxiang Zhao1   

  1. 1 Engineering Research Center of Ministry of Education for Fine Chemicals, Shanxi University, Taiyuan 030006, China;
    2 Faculty of Engineering and the Environment, University of Southampton, Southampton SO17 1BJ, UK
  • Received:2018-01-12 Revised:2019-03-02 Online:2020-03-17 Published:2019-12-28
  • Contact: Haitao Li, Yongxiang Zhao
  • Supported by:
    Supported by the National Natural Science Foundation of China (21673132).

The nature of the deactivation of hydrothermally stable Ni/SiO2-Al2O3 catalyst in long-time aqueous phase hydrogenation of crude 1,4-butanediol

Haitao Li1, Yin Zhang1, Hongxi Zhang1, Xiaoqin Qin1, Yalin Xu1, Ruifang Wu1, Zheng Jiang2, Yongxiang Zhao1   

  1. 1 Engineering Research Center of Ministry of Education for Fine Chemicals, Shanxi University, Taiyuan 030006, China;
    2 Faculty of Engineering and the Environment, University of Southampton, Southampton SO17 1BJ, UK
  • 通讯作者: Haitao Li, Yongxiang Zhao
  • 基金资助:
    Supported by the National Natural Science Foundation of China (21673132).

Abstract: The deactivation of Ni/SiO2-Al2O3 catalyst in hydrogenation of crude 1,4-butanediol was investigated. During the operation time of 2140 h, the catalyst showed slow activity decay. Characterization results, for four spent catalysts used at different time, indicated that the main reason of the catalyst deactivation was the deposition of carbonaceous species that covered the active Ni and blocked mesopores of the catalyst. The TPO and SEM measurements revealed that the carbonaceous species included both oligomeric and polymeric species with high C/H ratio and showed sheet. Such carbonaceous species might be eliminated through either direct H2 reduction or the combined oxidation-reduction methodologies.

Key words: 1,4-Butanediol, Hydrogenation, Ni/SiO2-Al2O3 catalyst, Deactivation, Regeneration

摘要: The deactivation of Ni/SiO2-Al2O3 catalyst in hydrogenation of crude 1,4-butanediol was investigated. During the operation time of 2140 h, the catalyst showed slow activity decay. Characterization results, for four spent catalysts used at different time, indicated that the main reason of the catalyst deactivation was the deposition of carbonaceous species that covered the active Ni and blocked mesopores of the catalyst. The TPO and SEM measurements revealed that the carbonaceous species included both oligomeric and polymeric species with high C/H ratio and showed sheet. Such carbonaceous species might be eliminated through either direct H2 reduction or the combined oxidation-reduction methodologies.

关键词: 1,4-Butanediol, Hydrogenation, Ni/SiO2-Al2O3 catalyst, Deactivation, Regeneration