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• W2037665796 abstract "Abstract Mild oxidation of coal can result in enhanced coal liquefaction yields, presumably due to the formation and decomposition of carbonyl or hyperoxide groups from the benzylic groups of alkyl bridges in the coal structure. Due to the ability to closely control the oxidizing or reducing conditions at the electrode, electrochemical routes for coal pretreatment have attracted considerable interest. Electrolysis of an Illinois coal in NaOH and H 2 SO 4 electrolytes at potentials of between 1.0 and 1.3 V vs. saturated calomel electrode (SCE) resulted in hydrogen production at current efficiencies of about 100% while a significant amount of sulfur was removed from the coal. Liquefaction of the coal was carried out in tetralin at 375°C with an initial hydrogen pressure of 140 psig (10.5 bar). The data obtained clearly indicate that electrochemical oxidation of coal slurries results in significant enhancement (up to 27%) in coal liquefication yields. The products (liquid) obtained from the liquefication of the electrolyzed coal contained substantially larger amounts of the more desirable pentane soluble fraction, while the undesirable benzene insoluble fraction content diminished. The data also show that the molecular weight of the liquid products obtained from pre-electrolyzed coal samples is very much lower than the corresponding molecular weight of the liquid products obtained from an untreated coal under the same liquefaction conditions." @default.
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• W2037665796 date "1992-09-01" @default.
• W2037665796 modified "2023-09-27" @default.
• W2037665796 title "Electrolytic pretreatment of coal for enhanced liquefaction" @default.
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• W2037665796 doi "https://doi.org/10.1016/0378-3820(92)90021-h" @default.
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