CO2 hydrogenation to hydrocarbons over alumina-supported iron catalyst: Effect of support pore size
发布时间：2019-03-12
点击次数：
- 论文类型：
- 期刊论文
- 发表时间：
- 2017-05-01
- 发表刊物：
- JOURNAL OF CO2 UTILIZATION
- 收录刊物：
- Scopus、EI、SCIE
- 文献类型：
- J
- 卷号：
- 19
- 页面范围：
- 202-208
- ISSN号：
- 2212-9820
- 关键字：
- CO2 hydrogenation; Alumina; Pore size; Particle size
- 摘要：
- The effect of support pore size of FeK/Al2O3 catalysts on the catalytic performance in CO2 hydrogenation reaction was investigated. A total of 8 iron-based catalysts supported on alumina with different pore size were prepared by incipient wetness impregnation where the amount of Fe and K were fixed at 15 and 10 wt%, respectively. N-2 adsorption/desorption, XRD, TPR and PZC were used to characterize the supports and catalysts. The results show that the support pore size impacts the size of Fe2O3 particles formed in the catalyst; increasing pore size of Al2O3 supports led to increased size of Fe2O3 particles formed in the pores. Catalyst pore sizes of 7-10 nm and the corresponding Fe2O3 particle sizes of 5-8 nm were the most active for CO2 hydrogenation to hydrocarbons. Outside this range, larger pore size further decrease the iron dispersion and reduce the number of active sites; smaller pore size is not favorable on account of the too small Fe2O3 particle sizes and lower reducibility of the small particle.
- 第一作者
- Xie, Tianze
- 合写作者
- Guo, Xinwen,Song, Chunshan,Ding, Fanshu,Zhang, Anfeng,Li, Wenhui,Wang, Jianyang