论文成果
CO2 Hydrogenation to Hydrocarbons over Iron-based Catalyst: Effects of Physicochemical Properties of Al2O3 Supports
  • 点击次数:
  • 论文类型:期刊论文
  • 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.

上一条: Facile synthesis of zeolite-encapsulated iron oxide nanoparticles as superior catalysts for phenol oxidation

下一条: Para-selective methylation of toluene with methanol over nano-sized ZSM-5 catalysts: Synergistic effects of surface modifications with SiO2, P2O5 and MgO