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- W2023298909 abstract "Abstract In Part 1 the authors reported that liquefaction of coal by hydrogenation in the presence or absence of vehicle and with or without catalyst progresses with characteristic variations of the reaction order. In the present paper, the roles of temperature, hydrogen, vehicle and catalyst have been studied using a free-radical scavenger such as p-benzoquinone or iodine. Based on these results, a set of characteristic reactions has been identified from which the following overall rate equation has been derived: d[P m ] dt = β 1 [C] + β 2 [C] 2 + β 3 where [Pm] denotes gas, and benzene-soluble products, [C] represents the percentages of organic matter in coal and benzene insoluble intermediates, and β1, β2 and β3 are constants. The rate equation thus explains the experimentally observed variation of the reaction order, which depends on the predominance of a particular group of reactions. It has been postulated that pyrolysis is the main driving force, and that hydrogenation of coal either with gaseous hydrogen or by hydrogen-donating vehicle is basically influenced by reactions involving free radicals." @default.
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- W2023298909 date "1979-03-01" @default.
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- W2023298909 title "A mechanistic study of hydrogenation of coal. 2." @default.
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- W2023298909 doi "https://doi.org/10.1016/0016-2361(79)90115-7" @default.
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