氮气吹扫和费托合成的脉冲过程以提高α-烯烃的选择性.pdfVIP

第 4 4 卷 第 7 期 燃 料 化 学 学 报 Vol. 44 No. 7 2 0 1 6 年 7 月 Journal of Fuel Chemistry and Technology Jul. 2016 文章编 ：0253-2409(2016)07鄄0822-08 Enhanced formation of 琢-olefins by the pulse proce between Fischer-Tropsch synthesis and N2 purging SHI He-xiang1,2, LI Zhi-kai1 , LIU Ke-feng3, XIAO Hai-cheng3, KONG Fan-hua3, ZHANG Juan1 , CHEN Jian-gang1 * * (1 . State Key Laboratory o f Coal Conversion, Institute o f Coal Chemistry , Chinese Academy o f Sciences, Taiyuan 030001, C hina ； 2 . University o f Chinese Academy o f Sciences, Beijing 100049, C hina ； 3 . Petrochemical Research Institute o f Petro China Company Lim ited , Beijing 100029, C hina) Abstract ：The Fischer-Tropsch synthesis has offered an alternative way to convert coal and biomass into chemicals such as 琢-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 琢- 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 sele