Iron/sulfur-catalyzed coal liquefaction in the presence of alcohol and carbon monoxide

Kazu Aki Hata, Nori Aki Kawasaki, Naokatsu Fuji, Yasunobu Nakagawa, Hayashi Jun-Ichiro, Yoshihisa Watanabe, Kenji Wada, Take Aki Mitsudo

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

The activities of several iron-based catalyst precursors towards the liquefaction of various kinds of coals, ranging from brown to bituminous, were examined in alcohol-carbon monoxide systems. Pentacarbonyliron (Fe(CO)5) with or without sulfur, or synthetic pyrite were found to be excellent catalyst precursors. Primary alcohols (ethanol and 1-propanol)-CO acted as an effective hydrogen source, whereas branched alcohols were less effective. In the Fe(CO)5/sulfur catalyzed liquefaction of Yallourn coal at 375°C for 120 min, a high conversion (99.5%) was achieved in the presence of ethanol and CO (7.0 MPa/cold). The two-staged reaction (375°C, 60 min + 425°C, 60 min) further improved the oil yield to 59.1% with a slight decrease in the coal conversion. The uptake of alcohol into asphaltene and preasphaltene fractions was distinctly observed, especially for Illinois No. 6 coal. The infrared analyses of the asphaltene fractions from each coal showed absorption at around 1705 cm-1, characteristic for those obtained in the linear alcohol-CO systems. According to the characterization of the products by NMR and the preliminary study using a model compound, alkylation as well as the hydrogenolysis seem to contribute to the dissolution of coals.

Original languageEnglish
Pages (from-to)255-267
Number of pages13
JournalFuel Processing Technology
Volume53
Issue number3
DOIs
Publication statusPublished - Jan 1 1998
Externally publishedYes

Fingerprint

Coal liquefaction
Coal
Carbon Monoxide
Sulfur
Carbon monoxide
Alcohols
Iron
Liquefaction
Ethanol
1-Propanol
Hydrogenolysis
Catalysts
Pyrites
Alkylation
Propanol
Hydrogen
Oils
Dissolution
Nuclear magnetic resonance
Infrared radiation

All Science Journal Classification (ASJC) codes

  • Chemical Engineering(all)
  • Fuel Technology
  • Energy Engineering and Power Technology

Cite this

Iron/sulfur-catalyzed coal liquefaction in the presence of alcohol and carbon monoxide. / Hata, Kazu Aki; Kawasaki, Nori Aki; Fuji, Naokatsu; Nakagawa, Yasunobu; Jun-Ichiro, Hayashi; Watanabe, Yoshihisa; Wada, Kenji; Mitsudo, Take Aki.

In: Fuel Processing Technology, Vol. 53, No. 3, 01.01.1998, p. 255-267.

Research output: Contribution to journalArticle

Hata, KA, Kawasaki, NA, Fuji, N, Nakagawa, Y, Jun-Ichiro, H, Watanabe, Y, Wada, K & Mitsudo, TA 1998, 'Iron/sulfur-catalyzed coal liquefaction in the presence of alcohol and carbon monoxide', Fuel Processing Technology, vol. 53, no. 3, pp. 255-267. https://doi.org/10.1016/S0378-3820(97)00075-1
Hata, Kazu Aki ; Kawasaki, Nori Aki ; Fuji, Naokatsu ; Nakagawa, Yasunobu ; Jun-Ichiro, Hayashi ; Watanabe, Yoshihisa ; Wada, Kenji ; Mitsudo, Take Aki. / Iron/sulfur-catalyzed coal liquefaction in the presence of alcohol and carbon monoxide. In: Fuel Processing Technology. 1998 ; Vol. 53, No. 3. pp. 255-267.
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