超临界流体
催化作用
费托法
烯烃纤维
超临界流体萃取
化学
萃取(化学)
己烷
蜡
碳氢化合物
溶剂
反应速率
化学工程
超临界水氧化
有机化学
选择性
工程类
作者
Kohshiroh Yokota,Yoshio Hanakata,Kaoru Fujimoto
出处
期刊:Fuel
[Elsevier]
日期:1991-08-01
卷期号:70 (8): 989-994
被引量:40
标识
DOI:10.1016/0016-2361(91)90056-g
摘要
A Fischer-Tropsch (FT) synthesis reaction was conducted in supercritical fluid media using conventional FT catalysts such as cobalt, ruthenium and iron catalysts. Waxy products were effectively extracted in situ from the catalyst bed. Among several supercritical solvents, n-hexane gave the highest extraction capability and the highest reaction rate. It was found that only 2 wt% of the total hydrocarbon product remained on the catalyst in the supercritical phase reaction, while 10–25 wt% of the product remained in the gas phase reaction. The partial pressure of the solvents could be reduced to one-third of the critical pressure while maintaining effective extraction capability for wax in the case of n-hexane solvent. It was also found that the olefin content in the hydrocarbon was highest for supercritical phase reaction in three reaction phases (gas, liquid and supercritical). This was attributed to the well-balanced extraction of primary product olefins from the catalyst and their quick diffusion.
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