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- W2018933712 abstract "Thermal and catalytic liquefaction runs were performed at 400 and 430 °C for 30 min in hydrogen with different hydroaromatic:aromatic, hydroaromatic:naphthenic or naphthenic:aromatic solvent blend ratios for Australian bituminous and Indonesian subbituminous coals. The results indicate that the subbituminous coal needs more efficient external hydrogen transfer to maintain high conversion than does the bituminous coal, implying that both hydrogen transfer from donor solvent and catalytic transfer from molecular hydrogen are important in improving subbituminous coal liquefaction yields. In bituminous coal liquefaction, it appears that the form of hydrogen, whether molecular or donatable from hydroaromatic solvent, is not critical as long as the internal hydrogen is present in sufficient amount and in a form usable by the coal and a minimum hydroaromaticity of the solvent system (tetralin:naphthalene ratio 1:3) is maintained. A temperature increase from 400 to 430 °C significantly affects the bituminous coal liquefaction yield, but little improvement is observed for the subbituminous coal. To optimize liquefaction, the solvent quality, temperature and catalyst must be properly chosen, depending on coal rank." @default.
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- W2018933712 date "1979-07-01" @default.
- W2018933712 modified "2023-10-15" @default.
- W2018933712 title "Effect of solvent extraction sequence on the apparent distribution of coal liquid products" @default.
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- W2018933712 doi "https://doi.org/10.1016/0378-3820(79)90006-7" @default.
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