燃料化学学报（中英文）2023，Vol.51Issue(5)：656-664,9.DOI:10.1016/S1872-5813(22)60064-1
Cu改性的FeMg@SiO2纳米级核壳催化剂实现合成气一步法制备液化石油气
Direct synthesis of LPG from syngas over Cu modified FeMg@SiO2 nano-level core@shell catalyst
摘要
Abstract
Direct synthesis of liquefied petroleum gas from syngas via Fischer-Tropsch synthesis route was systematically investigated over a nano-level core@shell catalyst. We introduced an incorporation of FeMg catalyst into mesoporous silica shell, with a further modification of Cu particles on the silica surface. The modified Cu/FeMg@SiO2 nano core-shell catalysts were synthesized by the combination of co-precipitation, modified sol-gel and facile impregnation methods. The as-synthesized catalysts ' physicochemical property was characterized by XRD, TEM, N2 adsorption-desorption, H2-TPR, XPS and CO2-TPD techniques. The catalytic performance of Cu/FeMg@SiO2 catalyst shows a high CO conversion of 96.6％, rather low CO2 selectivity of 21.9％ and considerable LPG selectivity of 37.9％. The catalytic results indicate that the SiO2 shell restrains the formation of CH4 and contributes to increasing long-chain products. Meanwhile, the enhanced CO conversion of Cu/FeMg@SiO2 was ascribed to the active metal Cu dispersed on SiO2 shell, which also promoted olefin hydrogenation and cracking of C5+ hydrocarbons products. The proposed catalyst preparation method will provide a new strategy for the synthesis of nano level catalyst with combinations of metal- and zeolite-based catalyst.关键词
液化石油气/核壳结构/费托合成/中孔SiO2壳Key words
liquefied petroleum gas/core/shell/Fischer-Tropsch synthesis/mesoporous SiO2 shell分类
化学化工引用本文复制引用
张培培,Atchimarungsri Thachapan..Cu改性的FeMg@SiO2纳米级核壳催化剂实现合成气一步法制备液化石油气[J].燃料化学学报（中英文）,2023,51(5):656-664,9.基金项目
The project was supported by the CCUS Project of China National Offshore Oil Corporation(KJGG-2022-12-CCUS-030401). （KJGG-2022-12-CCUS-030401）
