Synthesis of higher alcohols by Fischer-Tropsch synthesis over alkali metal-modified cobalt catalysts

Tamao Ishida, Tatsuya Yanagihara, Xiaohao Liu, Hironori Ohashi, Akiyuki Hamasaki, Tetsuo Honma, Hiroshi Oji, Takushi Yokoyama, Makoto Tokunaga

Research output: Contribution to journalArticle

48 Citations (Scopus)

Abstract

Alkali metal-modified unsupported and supported cobalt catalysts worked efficiently in the Fischer-Tropsch (FT) synthesis for the production of higher alcohols in a batch slurry-phase reactor. Sodium-modified Co catalysts exhibited the highest catalytic performance in terms of catalytic activity and higher alcohol selectivities compared to other alkali metal-modified Co catalysts: they also gave appreciable amounts of higher alcohols with more than four carbon atoms (C5+ alcohols) as much as 77% of the total alcohol distribution. According to the characterization of the catalysts using XRD, TEM, XPS, XAFS, and CO2-TPD, the effect of Na was suggested as follows: (i) a decrease in the size of Co nanoparticles, (ii) a decrease in the reducibility of Co(II) to Co(0), and (iii) an increase in surface basicity. These factors enable the production of higher alcohols with high selectivities at high CO conversions.

Original languageEnglish
Pages (from-to)145-154
Number of pages10
JournalApplied Catalysis A: General
Volume458
DOIs
Publication statusPublished - May 10 2013

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Alkali Metals
Fischer-Tropsch synthesis
Alkali metals
Cobalt
Alcohols
Catalysts
Catalyst selectivity
Carbon Monoxide
Temperature programmed desorption
Alkalinity
Catalyst activity
Carbon
X ray photoelectron spectroscopy
Sodium
Nanoparticles
Transmission electron microscopy
Atoms

All Science Journal Classification (ASJC) codes

  • Catalysis
  • Process Chemistry and Technology

Cite this

Synthesis of higher alcohols by Fischer-Tropsch synthesis over alkali metal-modified cobalt catalysts. / Ishida, Tamao; Yanagihara, Tatsuya; Liu, Xiaohao; Ohashi, Hironori; Hamasaki, Akiyuki; Honma, Tetsuo; Oji, Hiroshi; Yokoyama, Takushi; Tokunaga, Makoto.

In: Applied Catalysis A: General, Vol. 458, 10.05.2013, p. 145-154.

Research output: Contribution to journalArticle

Ishida, Tamao ; Yanagihara, Tatsuya ; Liu, Xiaohao ; Ohashi, Hironori ; Hamasaki, Akiyuki ; Honma, Tetsuo ; Oji, Hiroshi ; Yokoyama, Takushi ; Tokunaga, Makoto. / Synthesis of higher alcohols by Fischer-Tropsch synthesis over alkali metal-modified cobalt catalysts. In: Applied Catalysis A: General. 2013 ; Vol. 458. pp. 145-154.
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AU - Hamasaki, Akiyuki

AU - Honma, Tetsuo

AU - Oji, Hiroshi

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