文献类型：期刊文献

英文题名：Promotional effects of Mn on SiO2-encapsulated iron-based spindles for catalytic production of liquid hydrocarbons

作者：Zhang, Yulan Wang, Tiejun Ma, Longlong Shi, Ning Zhou, Dengfeng Li, Xinjun

第一作者：张玉兰

通信作者：Zhang, Yulan

机构：[1] Key Laboratory of Light Metal Materials Processing Technology of Guizhou Province, Guizhou Institute of Technology, No. 1 Caiguan Road, Guiyang, 550003, China; [2] Key Laboratory of Renewable Energy, Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, No. 2 Nengyuan Road, Guangzhou, 510640, China

第一机构：贵州理工学院材料与冶金工程学院

年份：2017

卷号：350

起止页码：41-47

外文期刊名：Journal of Catalysis

收录：EI(收录号：20171603579735);Scopus(收录号：2-s2.0-85017537464)

语种：英文

外文关键词：Iron compounds - Shells (structures) - Catalyst activity - Manganese - Iron - Liquid fuels - Liquids

摘要：Fischer–Tropsch synthesis (FTS) is a key technology for the production of liquid fuels from syngas. Enhanced liquid fuel production and catalytic stability can be achieved by rational design of catalysts Due to the metal–promoter interaction, conventional Mn-modified ion-based catalysts showed high C2 through C4 olefin selectivity and low activity. In this paper, Mn-containing SiO2-encapsulated ion-based double-shell spindles were fabricated and employed as a FTS catalyst. For the proposed design, the SiO2 shell not only is employed as an interlayer to weaken the contact between Fe and the Mn promoter, but also acted as the anchoring site for Mn nanoparticles. The results showed that the Mn-modified FeSiMn catalyst presents higher catalytic activity (3.41?×?10?5?molCO?gFe?1?s?1) and superior C5+ production (20.8?×?10?4?gHC?gFe?1?s?1) compared to the unmodified FeSi catalyst. This can be ascribed to the Mn-improved spillover effect. Thus, design of double-shell catalysts provides important clues for understanding the sole effect of the promoter on catalytic performance and for improving the production of liquid fuels. ? 2017 Elsevier Inc.