High-selective Fischer-Tropsch synthesis to jet fuel over confined iron catalysts inside carbon nanocages  

作　　者：Fujie Gao Xinyi Wang Ou Zhuo Changkai Zhou Lijun Yang Qiang Wu Yining Fan Xizhang Wang Hongwen Huang Zheng Hu 

机构地区：[1]Key Laboratory of Mesoscopic Chemistry of MOE and Jiangsu Provincial Laboratory for Nanotechnology,School of Chemistry and Chemical Engineering,Nanjing University,Nanjing 210023,China [2]College of Chemistry and Chemical Engineering,Jishou University,Jishou 416000,China

出　　处：《Nano Research》2025年第4期161-168,共8页纳米研究(英文版)

基　　金：jointly supported by the National Key Research and Development Program of China(No.2021YFA1500900);the National Natural Science Foundation of China(Nos.21972061 and 52071174);the Natural Science Foundation of Jiangsu Province,Major Project(No.BK20212005);the Foundation of Science and Technology of Suzhou(No.SYC2022102).

摘　　要：Selective production of specific products,such as jet fuel,in Fischer-Tropsch synthesis(FTS)is a huge challenge due to the Anderson-Schulz-Flory(ASF)distribution law.Herein,by filling K-promoted Fe-based active species,which usually produces medium-to-short chain hydrocarbons in high-temperature FTS,into the hierarchical carbon nanocages(hCNC),jet fuel with high selectivity of 60% is directly obtained in FTS at 300℃,exceeding the ASF maximum limitation of ca.41%.Through the theoretical simulations,we attribute this performance to the CO enrichment inside the nanocavities due to the sieving effect of the micropores across the hCNC shells(~6A)and the increased collision frequency in confined space.These two factors thereby promote the CO conversion and carbon-chain growth longer over the catalytically active Fe_(5)C_(2) phase,resulting in the remarkable selectivity to jet fuel.The effects of the length and size of micropores on the CO/H_(2) diffusion and FTS performance are examined,which corroborate the crucial role of micropores in the high-selective FTS to jet fuel.This work not only provides a remarkable catalyst to the selective jet fuel synthesis,but also offers an alternative way to design advanced catalysts for FTS.

关 键 词：Fischer-Tropsch synthesis confined iron catalysts jet fuel Anderson-Schulz-Flory distribution hierarchical carbon nanocages 

分 类 号：O643.36[理学—物理化学]