An Fe–Mn–Cu/SiO2@silicalite-1 catalyst for CO hydrogenation: the role of the zeolite shell on light-olefin production. Issue 10 (5th January 2016)

• Record Type: Journal Article
• Authors: Song, Weilin; Zhang, Bin; Chen, Lifeng; Shi, Jing; Cheng, Xiaowei; Wu, Lianghua; Yang, Weimin; Zhou, Jian; Zhang, Yahong; Tao, Yuewu; Tang, Yi
• Is Part Of: Catalysis science & technology. Volume 6:Issue 10(2016)
• Page Start: 3559
• Page End: 3567
• Publication Date: 2016-01-05
• Subjects: Catalysis -- Periodicals; 541.395
• DOI: 10.1039/c5cy01144b
• Languages: English
• ISSNs: 2044-4753

Abstract

Abstract : The silicalite-1 coated catalyst presents a unique temperature-dependent performance due to the zeolite shell's diffusion limitation on reactants and products and suppression of secondary reactions on downstream catalysts. Abstract : A core–shell structured catalyst is considered effective for regulating product distribution in a complex reaction network. By systematically analyzing the behaviors of an Fe–Mn–Cu/SiO2 @silicalite-1 core–shell catalyst in Fischer–Tropsch synthesis, a unique temperature-dependent role of the silicalite-1 shell is demonstrated on the distribution of products via modulation of the intra- and inter-pellet secondary reactions, which successfully fulfills synchronous increments of CO conversion, light olefin/light paraffin ratio (C2–4 = /C2–4 0 ) and C2–4 = selectivity, opposite to the behavior of a naked industrial Fe–Mn–Cu/SiO2 catalyst. This effect could be attributed to the different diffusion limitation of the silicalite-1 shell on various reactants/products in different temperature ranges. Such a discovery not only rationally explains the excellent performance of the core–shell catalyst on C2–4 = production but also provides a new clue for the design of catalysts in complex reaction networks.