燃料化学学报2016，Vol.44Issue(7)：822-829,8.
氮气吹扫和费托合成的脉冲过程以提高α-烯烃的选择性
Enhanced formation of α-olefins by the pulse process between Fischer-Tropsch synthesis and N2 purging
摘要
Abstract
The Fischer-Tropsch synthesis has offered an alternative way to convert coal and biomass into chemicals such asα-olefins via sygas comprised of H2 and CO. A pulse process switching between Fischer-Tropsch synthesis and N2 purging was carried out when the Fischer-Tropsch synthesis became stable in the fixed bed reactor. The activity and selectivity over Fe-Co catalyst for α-olefins in Fischer-Tropsch synthesis reaction were measured under the normal conditions of 2. 0 MPa, 497 K, 2 000 h-1 and H2/CO volume ratio of 2. 0. It was found that the olefin to paraffin ratio of C3 for Fe-Co catalyst purged at 517 K and 0. 2 MPa was almost nine times higher than that of the fresh one without purging under the same reaction conditions, and the CH4 selectivity and CO conversion decreased after purging. Two possible reasons were proposed to explain these phenomena. Moreover, a batch experiment by the pulse process in fixed bed reactor was performed. Notably, a high olefins yield was obtained via the pulse process during the Fischer-Tropsch synthesis.关键词
α-烯烃/脉冲过程/氮气吹扫/费托合成Key words
alpha olefins/pulse process/N2 purging/Fischer-Tropsch synthesis分类
化学化工引用本文复制引用
石和祥,李志凯,刘克峰,肖海成,孔繁华,张娟,陈建刚..氮气吹扫和费托合成的脉冲过程以提高α-烯烃的选择性[J].燃料化学学报,2016,44(7):822-829,8.基金项目
The project was supported by the National Natural Science Foundation of China (21373254,21503256) and PetroChina ( PRIKY14006, PRIKY15038, PRIKY15039, PRIKY15042).本文的英文电子版由Elsevier出版社在ScienceDirect上出版(http://www. sciencedirect. com/science/journal/18725813) （21373254,21503256）
