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Issue 2, 2020
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The effect of Mn on the performance of MCF-supported highly dispersed iron catalysts for Fischer–Tropsch synthesis

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Abstract

The effect of the Mn promoter in supported iron-based catalysts with different atomic ratios of Mn : Fe : Cu = x : 268 : 18 (x = 0, 9, 27, and 55) using mesoporous silica foam (MCF) as the carrier was evaluated in Fischer–Tropsch synthesis (FTS). High-dispersion iron catalysts with an iron content of up to 30 wt% were prepared using a co-impregnation method. The surface composition and physicochemical properties were characterized by X-ray photoelectron spectroscopy, X-ray diffraction, transmission electron microscopy, scanning electron microscopy, and N2-physisorption. The introduction of Mn in supported catalysts at a Mn : Fe atomic ratio of 9 : 268 led to the formation of ferric oxide for calcined catalysts; meanwhile, the carbonization of metallic iron was decreased and the reducibility of catalysts was decreased as well, which may be because of the enhanced FeMn interaction. Additionally, the yield of C5+ hydrocarbons could be effectively increased by the Mn promoter; the MCF-supported iron catalyst with an optimal Mn : Fe ratio of 9 : 268 showed the highest C5+ selectivity and the lowest CH4 selectivity.

Graphical abstract: The effect of Mn on the performance of MCF-supported highly dispersed iron catalysts for Fischer–Tropsch synthesis

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Supplementary files

Article information


Submitted
23 Oct 2019
Accepted
10 Dec 2019
First published
16 Dec 2019

Catal. Sci. Technol., 2020,10, 502-509
Article type
Paper

The effect of Mn on the performance of MCF-supported highly dispersed iron catalysts for Fischer–Tropsch synthesis

S. Huang, C. Liu, Y. Chen, J. Hong, Y. Zhao, Y. Zhang and J. Li, Catal. Sci. Technol., 2020, 10, 502
DOI: 10.1039/C9CY02140J

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