Fischer-Tropsch Synthesis: Characterization and Reaction Testing of Cobalt Carbide

Journal Article · Mon Aug 15 00:00:00 EDT 2011 · ACS Catalysis

OSTI ID:1041599

Khalid, S; Mohandas, J C; Gnanamani, M K; Jacobs, G; Ma, W; Ji, Y; Davis, B H

Hydrogenation of carbon monoxide was investigated for cobalt carbide synthesized from Co{sub 3}O{sub 4} 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, H{sub 2}/CO = 2:1 in the temperature range of 493-523 K, and with space velocities varying from 1 to 3 Nl h{sup -1} g{sub cat}{sup -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).

• Research Organization: Brookhaven National Lab. (BNL), Upton, NY (United States)
• Sponsoring Organization: USDOE SC OFFICE OF SCIENCE (SC)
• DOE Contract Number: DE-AC02-98CH10886
• OSTI ID: 1041599
• Report Number(s): BNL-96710-2011-JA; R&D Project: LS001; TRN: US201212%%17
• Journal Information: ACS Catalysis, Vol. 1, Issue 11; ISSN 2155-5435
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
ABSORPTION SPECTROSCOPY
CARBON MONOXIDE
CARBURIZATION
CATALYSTS
COBALT
COBALT CARBIDES
FINE STRUCTURE
FISCHER-TROPSCH SYNTHESIS
HYDROGENATION
PACKED BEDS
SCANNING ELECTRON MICROSCOPY
SPECTROSCOPY
SURFACE AREA
TANKS
TEMPERATURE RANGE 0400-1000 K
TESTING
X-RAY DIFFRACTION
carburization
cobalt carbide
cobalt
Fischer-Tropsch synthesis
XANES
EXAFS