Effects of Weak Surface Modification on Co/SiO2 Catalyst for Fischer-Tropsch Reaction

PLoS One. 2015 May 4;10(5):e0124228. doi: 10.1371/journal.pone.0124228. eCollection 2015.

Abstract

A weak surface modification is applied to Co/SiO2 catalyst by hydrothermal treatment at 180°C for 5 h. Aluminum is introduced to Co/SiO2 catalysts during the surface modification. The effects of surface modification on Co/SiO2 catalyst are studied by changing the operating sequences of surface modification and cobalt impregnation in the catalyst preparation. Surface modification before cobalt impregnation makes Co3O4 particle small and dispersed into the deep part of enlarged pore in SiO2, while surface modification after cobalt impregnation does not obviously change the particle size of Co3O4. The improved amplitude of catalytic activity is similar for the two kinds of catalysts, but they are benefited from different factors. The content of iso-hydrocarbons in the products is increased by the surface modifications.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Catalysis
  • Chemical Phenomena*
  • Cobalt / chemistry*
  • Hydrocarbons / chemistry
  • Microscopy, Electron, Scanning
  • Porosity
  • Silicon Dioxide / chemistry*
  • Surface Properties
  • Temperature
  • X-Ray Diffraction

Substances

  • Hydrocarbons
  • Cobalt
  • Silicon Dioxide

Grants and funding

This work was supported by Zhejiang Provincial Natural Science Foundation of China (LY14B030003), WN, and National Ministry of Science and Technology of China (2014BAD02B05), WN. The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.