Effects of surface hydrophobization on the phase evolution behavior of iron-based catalyst during Fischer–Tropsch synthesis

Yanfei Xu (), Zhenxuan Zhang, Ke Wu, Jungang Wang, Bo Hou, Ruoting Shan, Ling Li and Mingyue Ding ()
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Yanfei Xu: Wuhan University
Zhenxuan Zhang: Wuhan University
Ke Wu: Wuhan University
Jungang Wang: Chinese Academy of Sciences
Bo Hou: Chinese Academy of Sciences
Ruoting Shan: Wuhan University
Ling Li: Wuhan University
Mingyue Ding: Wuhan University

Nature Communications, 2024, vol. 15, issue 1, 1-9

Abstract: Abstract Iron-based Fischer–Tropsch synthesis (FTS) catalyst is widely used for syngas conversion, but its iron carbide active phase is easily oxidized into Fe3O4 by the water produced during reaction, leading to the deterioration of catalytic performance. Here, we show an efficient strategy for protecting the iron carbide active phase of FTS catalyst by surface hydrophobization. The hydrophobic surface can reduce the water concentration in the core vicinity of catalyst during syngas conversion, and thus inhibit the oxidation of iron species by water, which enhances the C − C coupling ability of catalyst and promotes the formation of long-chain olefins. More significantly, it is unraveled that appropriate shell thickness plays a crucial role in stabilizing the iron carbide active phase without Fe3O4 formation and achieving good catalytic performance.

Date: 2024
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DOI: 10.1038/s41467-024-51472-w

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