宁夏大学学报（自然科学版中英文）2026，Vol.47Issue(5)：441-450,457,11.DOI:10.20176/j.cnki.nxdz.20260905
Na-Fe/C催化剂的设计及其CO加氢制烯烃性能
Design of Na-Fe/C catalysts and Their Performance in CO Hydrogenation to Olefins
摘要
Abstract
Fischer-Tropsch synthesis(FTS)is a process that converts synthesis gas into clean liquid fuels and high-value chemicals through heterogeneous catalytic reactions.In it,rational design of the structure of Fe-based catalysts can achieve the directional conversion of synthesis gas to high-value olefins.A carbon support was prepared using a sucrose solution as the carbon source;the texture and surface properties of the carbon sup-port were adjusted through pyrolysis reactions;C-loaded Fe-based catalysts were prepared,and Na promoter was used to modify the catalyst surface;the influence of the catalyst surface properties on FTS performance was investigated.The results indicate that 600℃is the optimal pyrolysis reaction temperature,and the C-600 sup-port prepared at this temperature possesses abundant oxygen-containing groups,high specific surface area,and suitable pore structure.The introduction of the support significantly promotes metal dispersion;the oxygen-containing groups are conducive to improving olefin selectivity and carbon chain growth ability;the addition of Na increases the electron cloud density of the Fe sites due to the electron transfer effect,thereby enhancing the catalyst's ability to adsorb and dissociate CO,promoting the carbon chain growth of catalytic reaction products,and inhibiting hydrogenation side reactions;when the mass fraction of Na modification is 2％,the catalytic per-formance is optimal,with a CO conversion of 86.76％,a C2-C4=selectivity of 41.92％,an olefin to paraffin molar ratio(O/P)of 5.68,and a linear α-olefin selectivity of 66.31％of the total hydrocarbons,effectively optimizing the product distribution.The research results can provide insights into the design of high efficiency Fe-based catalysts.关键词
费托合成/Fe/C催化剂/表面改性/产物分布Key words
Fischer-Tropsch synthesis/Fe/C catalysts/surface modification/product distribution分类
化学化工引用本文复制引用
张雪建,王文青,赵双宏,张帅,高新华,赵天生,张建利..Na-Fe/C催化剂的设计及其CO加氢制烯烃性能[J].宁夏大学学报（自然科学版中英文）,2026,47(5):441-450,457,11.基金项目
国家自然科学基金资助项目(22368041) （22368041）
宁东能源化工基地重点支持领域专项计划(2025NDKJXMLX005) （2025NDKJXMLX005）
