Reactions of coals of different ranks with COH2 mixtures with and without sodium aluminate

Chris K.J. Hulston, Peter J. Redlich, W. Roy Jackson, Frank P. Larkins, Marc Marshall

Research output: Contribution to journalArticleResearchpeer-review

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Abstract

Well-characterized coals of different H/C atomic ratio and rank were reacted at 365°C with CO, H2 and COH2 mixtures in water in the presence and absence of sodium aluminate. The optimum H2/CO ratio for conversion was found to vary with the type of coal. It was <1 : 1 for low-rank and subbituminous coals, whereas the conversion of bituminous coals either did not vary with H2/CO ratio or reached a maximum at a higher H2/CO ratio (2 : 1). Even for a bituminous coal there was no advantage in reducing the water/coal ratio below 2 : 1 in NaAlO2-catalysed reactions. The conversions increased with increasing H/C atomic ratio of the coal and decreasing rank, with or without NaAlO2. Asphaltene yields increased with increasing coal rank and increasing proportion of CO in the H2CO reacting gases. The mechanistic implications of these results are briefly discussed.

Original languageEnglish
Pages (from-to)1870-1874
Number of pages5
JournalFuel
Volume74
Issue number12
DOIs
Publication statusPublished - 1 Jan 1995

Keywords

  • catalysis
  • coal liquefaction
  • COH mixtures

Cite this

Hulston, C. K. J., Redlich, P. J., Jackson, W. R., Larkins, F. P., & Marshall, M. (1995). Reactions of coals of different ranks with COH2 mixtures with and without sodium aluminate. Fuel, 74(12), 1870-1874. https://doi.org/10.1016/0016-2361(95)80021-9
Hulston, Chris K.J. ; Redlich, Peter J. ; Jackson, W. Roy ; Larkins, Frank P. ; Marshall, Marc. / Reactions of coals of different ranks with COH2 mixtures with and without sodium aluminate. In: Fuel. 1995 ; Vol. 74, No. 12. pp. 1870-1874.
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Hulston, CKJ, Redlich, PJ, Jackson, WR, Larkins, FP & Marshall, M 1995, 'Reactions of coals of different ranks with COH2 mixtures with and without sodium aluminate', Fuel, vol. 74, no. 12, pp. 1870-1874. https://doi.org/10.1016/0016-2361(95)80021-9

Reactions of coals of different ranks with COH2 mixtures with and without sodium aluminate. / Hulston, Chris K.J.; Redlich, Peter J.; Jackson, W. Roy; Larkins, Frank P.; Marshall, Marc.

In: Fuel, Vol. 74, No. 12, 01.01.1995, p. 1870-1874.

Research output: Contribution to journalArticleResearchpeer-review

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T1 - Reactions of coals of different ranks with COH2 mixtures with and without sodium aluminate

AU - Hulston, Chris K.J.

AU - Redlich, Peter J.

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AU - Larkins, Frank P.

AU - Marshall, Marc

PY - 1995/1/1

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AB - Well-characterized coals of different H/C atomic ratio and rank were reacted at 365°C with CO, H2 and COH2 mixtures in water in the presence and absence of sodium aluminate. The optimum H2/CO ratio for conversion was found to vary with the type of coal. It was <1 : 1 for low-rank and subbituminous coals, whereas the conversion of bituminous coals either did not vary with H2/CO ratio or reached a maximum at a higher H2/CO ratio (2 : 1). Even for a bituminous coal there was no advantage in reducing the water/coal ratio below 2 : 1 in NaAlO2-catalysed reactions. The conversions increased with increasing H/C atomic ratio of the coal and decreasing rank, with or without NaAlO2. Asphaltene yields increased with increasing coal rank and increasing proportion of CO in the H2CO reacting gases. The mechanistic implications of these results are briefly discussed.

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Hulston CKJ, Redlich PJ, Jackson WR, Larkins FP, Marshall M. Reactions of coals of different ranks with COH2 mixtures with and without sodium aluminate. Fuel. 1995 Jan 1;74(12):1870-1874. https://doi.org/10.1016/0016-2361(95)80021-9