Fischer-tropsch synthesis: Characterization and reaction testing of cobalt carbide

Janet Chakkamadathil Mohandas, Muthu Kumaran Gnanamani, Gary Jacobs, Wenping Ma, Yaying Ji, Syed Khalid, Burtron H. Davis

Research output: Contribution to journalArticlepeer-review

131 Scopus citations

Abstract

Hydrogenation of carbon monoxide was investigated for cobalt carbide synthesized from Co3O4 by CO carburization in a fixed-bed reactor. The cobalt carbide synthesized was characterized by BET surface area, X-ray diffraction, scanning electron microscopy, X-ray absorption near edge spectroscopy, and extended X-ray absorption fine structure spectroscopy. The catalysts were tested in the slurry phase using a continuously stirred tank reactor at P = 2.0 MPa, H2/CO = 2:1 in the temperature range of 493-523 K, and with space velocities varying from 1 to 3 Nl h-1 gcat-1. The results strongly suggest that a fraction of cobalt converts to a form with greater metallic character under the conditions employed. This was more pronounced on a Fischer-Tropsch synthesis run conducted at a higher temperature (523 versus 493 K).

Original languageEnglish
Pages (from-to)1581-1588
Number of pages8
JournalACS Catalysis
Volume1
Issue number11
DOIs
StatePublished - Nov 4 2011

Keywords

  • carburization
  • cobalt
  • cobalt carbide
  • EXAFS
  • Fischer-Tropsch synthesis
  • XANES

ASJC Scopus subject areas

  • Catalysis
  • General Chemistry

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