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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, Advance Article
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, Advance Article , DOI: 10.1039/C9CY02140J

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