Chemical Research in Chinese Universities ›› 2020, Vol. 36 ›› Issue (6): 1006-1012.doi: 10.1007/s40242-020-0253-5

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Effect of Support on Catalytic Performance of Photothermal Fischer-Tropsch Synthesis to Produce Lower Olefins over Fe5C2-based Catalysts

LI Yuan, LI Ruizhe, LI Zhenhua, WEI Weiqin, OUYANG Shuxin, YUAN Hong, ZHANG Tierui   

  1. College of Chemistry, Central China Normal University, Wuhan 430079, P. R. China
  • Received:2020-08-05 Revised:2020-09-09 Online:2020-12-01 Published:2020-12-03
  • Contact: OUYANG Shuxin E-mail:oysx@mail.ccnu.edu.cn
  • Supported by:
    Supported by the National Natural Science Foundation of China(No.21972052) and the Financial Support from the "Guizi Scholar" Program of Central China Normal University, China.

Abstract: Photothermal Fischer-Tropsch synthesis(FTS) has been extensively studied, but few reports were focused on systematically exploring the influence of support on catalytic performance. Herein, a series of Fe5C2-based catalysts with different supports was fabricated via a one-step wet-chemical method for photothermal conversion of syngas to lower olefins. Under light irradiation, the optimized Fe5C2/α-Al2O3 catalyst demonstrated remarkable photothermal FTS activity, delivering selectivity to lower olefins of 50.3% with a CO conversion rate of 52.5%. Characterization studies using X-ray diffraction and Mössbauer spectroscopy analysis revealed that the active catalyst mainly contained Fe5C2 nanoparticles on α-Al2O3 support. It was found that the weak interaction between active phase and α-Al2O3 could promote the formation of Fe5C2, which contributed to the high selectivity to lower olefins.

Key words: χ-Fe5C2 catalyst, Fischer-Tropsch synthesis, Metal-support interaction, Photothermal catalysis