文献类型：期刊文献

英文题名：Novel Fe/MnK-CNTs nanocomposites as catalysts for direct production of lower olefins from syngas

作者：Wang, Di[1,2]; Ji, Jian[1]; Chen, Bingxu[1]; Chen, Wenyao[1]; Qian, Gang[1]; Duan, Xuezhi[1]; Zhou, Xinggui[1]; Holmen, Anders[2]; Chen, De[2]; Walmsley, John C.[3]

机构：[1] State Key Laboratory of Chemical Engineering, East China University of Science and Technology, Shanghai, 200237, China; [2] Dept. of Chemical Engineering, Norwegian University of Science and Technology, Trondheim, 7491, Norway; [3] SINTEF Materials and Chemistry, Trondheim, 7465, Norway

年份：2017

卷号：63

期号：1

起止页码：154

外文期刊名：AIChE Journal

收录：EI(收录号：20165003125170)

语种：英文

外文关键词：X ray photoelectron spectroscopy - X ray diffraction - Calcination - Manganese - Surface chemistry - Fischer-Tropsch synthesis - Synthesis gas - Nickel - Catalyst selectivity - Economic and social effects - Nanocomposites - Iron - Olefins

摘要：Novel Fe/MnK-CNTs nanocomposites are developed as catalysts for direct production of lower olefins from syngas, delivering a high iron time yield of 337.2 μmolCO· ·s?1 with 51.3%C selectivity toward C2?C4 olefins under the optimalreaction conditions (270°C, 2.0 MPa, 30,000 mLh?1. These catalysts are optimized by varyingcalcination temperature from 150 to 400°C. Multiple techniques including transmission electron microscopy, Elemental mapping, X-ray diffraction, X-ray photoelectron spectroscopy, H2-temperature-programmed reduction, and Raman were employed to reveal the relationship between the catalyst nature and unique catalytic behavior. In particular, the resultant catalyst from the calcination temperature of 220°C exhibits the highest selectivity of C2?C4 olefins as well as good stability, which are enabled by the trade-off among the effects of iron particle sizes, promoters, metal-support interaction and support surface chemistry. Moreover, influences of reaction temperature, reaction pressure and space velocity are also investigated. ? 2016 American Institute of Chemical Engineers AIChE J, 63: 154–161, 2017. ? 2016 American Institute of Chemical Engineers