Coal liquefaction by the hydrogen produced from methanol: 2. Model compound studies

Coal can be converted into a material soluble in solvents using methanol as an in-situ hydrogen source and also as an alkylating agent. This paper presents the results of the reaction of selected model compounds with methanol using two different hydrogenation catalysts: stabilized nickel at 365 °C,...

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Bibliographic Details
Published inFuel (Guildford) Vol. 63; no. 5; pp. 579 - 585
Main Authors Mondragon, Fanor, Kamoshita, Ryuji, Katoh, Takashi, Itoh, Hironori, Ouchi, Koji
Format Journal Article
LanguageEnglish
Published Elsevier Ltd 1984
Subjects
alkylation
coal
liquefaction
methanol
model compounds
methanol
coal
alkylation
liquefaction
model compounds
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Summary:Coal can be converted into a material soluble in solvents using methanol as an in-situ hydrogen source and also as an alkylating agent. This paper presents the results of the reaction of selected model compounds with methanol using two different hydrogenation catalysts: stabilized nickel at 365 °C, and stabilized cobalt at 405 °C and 445 °C. Stabilized nickel is a much better hydrogenation catalyst than stabilized cobalt. The alkylation reaction is strongly dependent on the presence of specific functional groups (-OH, -NH, etc). Also, the alkylation reaction appears to be independent of the hydrogenation catalyst used and it seems to depend more on the temperature. The alkylated products from the reactions at 405 °C showed an order as follows: carbazole phenol ⪢ phenanthrene dibenzofuran diphenylether dibenzothiophene diphenylmethane. A free radical mechanism is proposed for the alkylation reaction.
ISSN:0016-2361
1873-7153
DOI:10.1016/0016-2361(84)90149-2