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- W2023006861 abstract "Abstract The effects of changes in heating rate of a coal/solvent slurry on conversions to pyridine-soluble material have been examined. Dramatic increases in conversions were observed when the coal/solvent mixture was maintained at a temperature of 589 K for 10 min before heating to reaction conditions of 700 K for 5 min. In particular, conversion increased from 32.0 to 76.7 wt % and the ratio of oils to preasphaltenes increased by a factor of four. The temperature range for the greatest effect is observed to be 550–595 K while 450 K shows no change in conversion. The mechanism is thought to be chemisorption of the solvent or solvent occlusion which would increase the concentration of hydrogen donor in the coal matrix thus affecting the reaction environment. Additional studies to further define the details of the programmed heating rate as well as explore the mechanism are needed." @default.
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- W2023006861 date "1987-02-01" @default.
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- W2023006861 title "Effect of slurry heating rate on short-contact-time coal liquefaction" @default.
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- W2023006861 doi "https://doi.org/10.1016/0016-2361(87)90257-2" @default.
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