天然气化工2011，Vol.36Issue(5)：28-32,5.
提高费-托合成熔铁催化剂低碳烯烃选择性的研究
Study on improving light olefins selectivity of fused-iron catalyst in F-T synthesis
陆丽姣 1杨霞珍 1唐浩东 1刘化章1
作者信息
- 1. 浙江工业大学工业催化研究所,浙江杭州310032
- 折叠
摘要
Abstract
Fischer-Tropsch synthesis (FTS) reaction on the fused-iron catalyst was studied in a fixed bed reactor. Hie effects of iron oxide precursors and promoters on the activity of the catalyst and the selectivity to C2-C4 light olefins were investigated. The reduction behavior and the surface acidity and basicity of the catalysts were characterized by TG-DTG and Cor-TPD. The experimental results showed that when n (Fe2+)/n. (Fe3+) in the iron oxide precursors was about 1, the prepared fused-iron catalyst had the highest surface basicity, which helped to improve the selectivity of light olefins. The addition of promoter M2O3 highly increased the selectivity of olefins in C2-C4 to 83.7% [n (olefin):n (paraffin) of 5.12] with a CO conversion of 73.0% at the conditions of n(H2)/ n (CO)=1.6, p=2.0 Mpa, r=310℃ and GHSV=11400h-1. The result of the orthogonal test showed that V2O5 and MoO3 reduced the selectivity to olefins in C2-C4, and the effects of other promoters were not observed.关键词
费-托合成/熔铁催化剂/母体相/助催化剂/低碳烯烃/选择性Key words
F-T synthesis/ fused-iron catalyst/ precursor/ promoter/ light olefins/ selectivity分类
化学化工引用本文复制引用
陆丽姣,杨霞珍,唐浩东,刘化章..提高费-托合成熔铁催化剂低碳烯烃选择性的研究[J].天然气化工,2011,36(5):28-32,5.
