A hydrophobic FeMn@Si catalyst increases olefins from syngas by suppressing C1 by-products

doi:10.1126/science.abb3649

GSTDTAP > 气候变化

DOI	10.1126/science.abb3649
	A hydrophobic FeMn@Si catalyst increases olefins from syngas by suppressing C1 by-products
	Yanfei Xu; Xiangyang Li; Junhu Gao; Jie Wang; Guangyuan Ma; Xiaodong Wen; Yong Yang; Yongwang Li; Mingyue Ding
	2021-02-05
发表期刊	Science
出版年	2021
英文摘要	Syngas, a mixture of carbon monoxide (CO) and hydrogen, allows nonpetroleum resources such as biomass and natural gas to be converted to chemical products through Fischer-Tropsch synthesis. However, for the production of olefins, a key feedstock for other chemicals, about 50% of the CO is transformed to carbon dioxide and methane. Xu et al. decreased the selectivity for these undesired by-products to under 25% by modifying their catalyst, nanoparticles of iron doped with manganese and coated with a silica, with methyl groups (see the Perspective by Xie). This hydrophobic surface shortens the retention time of water on the catalyst surface to avoid the unwanted side reactions, and also suppresses oxidation of the metal carbide catalyst that forms under reaction conditions. Science , this issue p. [610][1]; see also p. [577][2] Although considerable efforts have been made in the selective conversion of syngas [carbon monoxide (CO) and hydrogen] to olefins through Fischer-Tropsch synthesis (FTS), ~50% of the converted CO is transformed into the undesired one-carbon molecule (C1) by-products [carbon dioxide (CO2) and methane (CH4)]. In this study, a core-shell FeMn@Si catalyst with excellent hydrophobicity was designed to hinder the formation of CO2 and CH4. The hydrophobic shell protected the iron carbide core from oxidation by water generated during FTS and shortened the retention of water on the catalyst surface, restraining the side reactions related to water. Furthermore, the electron transfer from manganese to iron atoms boosted olefin production and inhibited CH4 formation. The multifunctional catalyst could suppress the total selectivity of CO2 and CH4 to less than 22.5% with an olefin yield of up to 36.6% at a CO conversion of 56.1%. [1]: /lookup/doi/10.1126/science.abb3649 [2]: /lookup/doi/10.1126/science.abg1750
领域	气候变化 ; 资源环境
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引用统计
文献类型	期刊论文
条目标识符	http://119.78.100.173/C666/handle/2XK7JSWQ/314050
专题	气候变化资源环境科学
推荐引用方式 GB/T 7714	Yanfei Xu,Xiangyang Li,Junhu Gao,et al. A hydrophobic FeMn@Si catalyst increases olefins from syngas by suppressing C1 by-products[J]. Science,2021.
APA	Yanfei Xu.,Xiangyang Li.,Junhu Gao.,Jie Wang.,Guangyuan Ma.,...&Mingyue Ding.(2021).A hydrophobic FeMn@Si catalyst increases olefins from syngas by suppressing C1 by-products.Science.
MLA	Yanfei Xu,et al."A hydrophobic FeMn@Si catalyst increases olefins from syngas by suppressing C1 by-products".Science (2021).