Effect of process conditions on the product distribution of Fischer-Tropsch synthesis over a Re-promoted cobalt-alumina catalyst using a stirred tank slurry reactor

Branislav Todic, Wenping Ma, Gary Jacobs, Burtron H. Davis, Dragomir B. Bukur

Research output: Contribution to journalArticle

35 Citations (Scopus)

Abstract

The effects of process conditions on Fischer-Tropsch synthesis (FTS) product distribution were studied using a 1-L stirred tank slurry reactor and a 0.48%Re-25%Co/Al2O3 catalyst. It was found that the chain growth probability of C1 intermediate (α1) has the most dominant effect on CH4 and C5+ selectivity. α1 was found to be highly dependent on process conditions. Relatively constant values of C2+ growth probabilities with reactor residence time, as well as other process variables, suggest that 1-olefin readsorption has a minor effect on product selectivities. A low value of α1 and its different response to variations in process conditions, compared to higher chain growth probabilities, seems to support a hypothesis that a higher-than-expected yield of methane is caused by at least two separate methane formation pathways. Understanding these pathways and ways to suppress excess methane formation is a key factor in obtaining higher C 5+ selectivity.

Original languageEnglish
Pages (from-to)325-338
Number of pages14
JournalJournal of Catalysis
Volume311
DOIs
Publication statusPublished - Mar 2014

Fingerprint

Fischer-Tropsch synthesis
Aluminum Oxide
Methane
Cobalt
Alumina
cobalt
methane
aluminum oxides
selectivity
reactors
catalysts
Catalysts
synthesis
products
Alkenes
alkenes
Olefins

Keywords

  • Cobalt catalyst
  • Fischer-Tropsch synthesis
  • Process conditions
  • Product selectivity
  • Rhenium promoter
  • Slurry reactor

ASJC Scopus subject areas

  • Catalysis
  • Physical and Theoretical Chemistry

Cite this

Effect of process conditions on the product distribution of Fischer-Tropsch synthesis over a Re-promoted cobalt-alumina catalyst using a stirred tank slurry reactor. / Todic, Branislav; Ma, Wenping; Jacobs, Gary; Davis, Burtron H.; Bukur, Dragomir B.

In: Journal of Catalysis, Vol. 311, 03.2014, p. 325-338.

Research output: Contribution to journalArticle

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