CO2 hydrogenation to hydrocarbons over alumina-supported iron catalyst: Effect of support pore size

Tianze Xie, Jianyang Wang, Fanshu Ding, Anfeng Zhang, Wenhui Li, Xinwen Guo, Chunshan Song

Research output: Contribution to journalArticlepeer-review

14 Scopus citations

Abstract

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. N2 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.

Original languageEnglish (US)
Pages (from-to)202-208
Number of pages7
JournalJournal of CO2 Utilization
Volume19
DOIs
StatePublished - May 1 2017

All Science Journal Classification (ASJC) codes

  • Chemical Engineering (miscellaneous)
  • Waste Management and Disposal
  • Process Chemistry and Technology

Fingerprint Dive into the research topics of 'CO<sub>2</sub> hydrogenation to hydrocarbons over alumina-supported iron catalyst: Effect of support pore size'. Together they form a unique fingerprint.

Cite this