Chinese Journal of Catalysis ›› 2020, Vol. 41 ›› Issue (4): 604-612.DOI: 10.1016/S1872-2067(19)63436-4

• Special Column for the Youth Innovation Promotion Association, Chinese Academy of Sciences • Previous Articles     Next Articles

A facile solvent-free synthesis strategy for Co-imbedded zeolite-based Fischer-Tropsch catalysts for direct gasoline production

Mudassar Javeda, Shilin Chenga, Guihua Zhanga, Cederick Cyril Amooa, Jingyan Wangc,d, Peng Lua, Chengxue Lua, Chuang Xinga, Jian Sunb, Noritatsu Tsubakid   

  1. a School of Biological and Chemical Engineering, Zhejiang University of Science and Technology, Hangzhou 310023, Zhejiang, China;
    b Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, Liaoning, China;
    c Beijing Booming Highchem Technology Co., LTD, Beijing 100005, China;
    d Department of Applied Chemistry, Graduate School of Engineering, University of Toyama, Gofuku 3190, Toyama 9308555, Japan
  • Received:2019-08-25 Revised:2019-10-05 Online:2020-04-18 Published:2019-12-12
  • Supported by:
    The authors acknowledge the financial support from the Zhejiang Province Natural Science Foundation (LY19B060001), the Foundation of State Key Laboratory of High-efficiency Utilization of Coal and Green Chemical Engineering (2018-K25), and the Foundation of Zhejiang University of Science and Technology (2019QN18, 2019QN23).

Abstract: A series of Co-imbedded zeolite-based catalysts were synthesized following a facile solvent-free grinding route. The catalytic performance for direct syngas conversion to gasoline range hydrocarbons was compared with their counterpart Co-impregnated zeolite-based catalysts. Successful transformation of solid raw materials to targeted zeolite was confirmed by XRD, SEM, STEM, and N2 physisorption analysis. An in-depth study of acidic strength and acidic site distribution was conducted by NH3-TPD and Py-IR spectroscopy. Acidic strength showed a pivotal role in defining product range. Co@S1, with the weakest acidic strength of silicalite-1 among three types of zeolites, evaded over-cracking of product and exhibited the highest gasoline and isoparaffin selectivity (≈70% and 30.7%, respectively). Moreover, the solvent-free raw material grinding route for zeolite synthesis accompanies several advantages like the elimination of production of wastewater, high product yield within confined crystallization space, and elimination of safety concerns regarding high pressure due to the absence of the solvent. Facileness and easiness of the solvent-free synthesis route together with promising catalytic performance strongly support its application on the industrial scale.

Key words: Solvent-free synthesis, Co-imbedded zeolite catalyst, Fischer-Tropsch synthesis, Gasoline, Isoparaffin