4.7 Article

Enhanced Fe-Cr dispersion on mesoporous silica support using surfactant-assisted melt-infiltration for the water-gas shift reaction in waste-to- hydrogen processes

期刊

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
卷 48, 期 64, 页码 24894-24903

出版社

PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijhydene.2022.11.132

关键词

Dispersion; Water-gas shift; Waste-to-hydrogen; CrFeSiO2; Surfactant

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Iron-chromium/SBA-15 catalysts for high-temperature water-gas shift reactions were synthesized using the surfactant-assisted melt-infiltration method, achieving high dispersion and loading without a liquid solution. The addition of Span60 surfactant enhanced the dispersion of Fe3O4 particles and facilitated their infiltrations into the mesopores of SBA-15 support. The Fe-Cr catalyst prepared via SAMI exhibited improved performance and stability for the HTS reaction compared to the catalyst without surfactant.
Iron-chromium/SBA-15 (Fe-Cr/SBA-15) catalysts for high-temperature water-gas shift re-actions (HTS) were prepared using the surfactant-assisted melt-infiltration (SAMI) method. The SAMI method was used to synthesize an efficient catalyst that could simultaneously achieve high dispersion and loading (Fe: 40 wt% and Cr/Fe molar ratio: 0.25) without a liquid solution. According to X-ray diffraction (XRD) and transmission electron microscopy analyses, it was observed that the Span60 surfactant enhanced Fe3O4 particle dispersion. N2 adsorption-desorption analysis indicated that the Fe3O4 and chromium oxide particles were thoroughly infiltrated inside the mesopores of the SBA-15 support. XRD and temperature-programmed-reduction analyses revealed that the well-dispersed Fe3O4 acted as active sites for the HTS reaction when Span60 was added to the Fe-Cr catalyst. In other words, the Fe-Cr catalyst synthesized via SAMI exhibited better performance and stability for the HTS reaction than that prepared without the surfactant.& COPY; 2022 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.

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