CO2 Hydrogenation to Hydrocarbons over Iron-based Catalyst: Effects of Physicochemical Properties of Al2O3 Supports
发表时间：2019-03-09
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- 论文类型：
- 期刊论文
- 第一作者：
- Ding, Fanshu
- 通讯作者：
- Guo, XW (reprint author), Dalian Univ Technol, Sch Chem Engn, State Key Lab Fine Chem, PSU DUT Joint Ctr Energy Res, Dalian 116024, Peoples R China.
- 合写作者：
- Zhang, Anfeng,Liu, Min,Zuo, Yi,Li, Keyan,Guo, Xinwen,Song, Chunshan
- 发表时间：
- 2014-11-12
- 发表刊物：
- INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
- 收录刊物：
- SCIE、EI、Scopus
- 文献类型：
- J
- 卷号：
- 53
- 期号：
- 45
- 页面范围：
- 17563-17569
- ISSN号：
- 0888-5885
- 摘要：
- The effects of surface hydroxyl groups and SiO2 content of alumina supports for FeK/Al2O3 catalysts on their activity and product selectivity for CO2 hydrogenation to hydrocarbons reaction were investigated. A series of iron-based catalysts supported on six commercial Al2O3 supports were prepared and tested for hydrocarbons production in a fixed-bed reactor. Surface acidicbasic hydroxyls distribution of the supports were evaluated by Fourier transform infrared (FT-IR) and point of zero charge (PZC) measurement. It was found that the PZC of Al2O3 supports strongly affects the dispersion as well as particle size of the Fe-based catalysts. Increasing PZC value of Al2O3, the iron dispersion increased and particle size decreased. The highest CO2 conversion (54.4%) and C-5(+) hydrocarbons selectivity (31.1%) were achieved when the PZC was 8.0. CO2 conversion and the long-chain products selectivity decreased when PZC declined. Moreover, SiO2-doping of alumina strongly affected the surface acidicbasic hydroxyls distribution of the supports, while a desired SiO2 content improved the catalyst activity by adjusting CO adsorption and the reduction behavior of the iron-based catalysts.
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