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- W2024197097 abstract "This study was initiated to determine some of the chemical reactions that occur during the supercritical fluid extraction of coal, using model compounds to simulate molecular structures found in coal. Water was chosen as the fluid because of its unique chemical and physical properties at critical conditions. Two primary functions of coal processing are the removal of heteroatoms and the depolymerization of larger molecules, thus the reactions of quinoline and isoquinoline were extensively examined, with very brief studies made of benzonitrile, aniline, tetralin, dihydroanthracene and ethylbenzene. In addition, since ZnCl2 has been used as a hydrogenation catalyst and in the hydrocracking of aromatics, it was added in some experiments to increase the reactivity of some of the compounds. It was found that the compounds studied were more reactive and reached by different mechanisms in the presence of supercritical water than when undergoing inert pyrolysis. The product distributions from the two quinolines indicated that they reacted by very different mechanisms; possible reaction schemes for these are discussed. In addition, it was found that about 70% of the nitrogen from the consumed quinolines and aniline was removed in the water layer as ammonia, that alkyl sidechains on aromatics were somewhat reactive and that some carbon atoms are oxidized by the water thus providing a source of hydrogen for the formation of other products." @default.
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- W2024197097 date "1986-06-01" @default.
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- W2024197097 title "Reactivity of some organic compounds with supercritical water" @default.
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- W2024197097 doi "https://doi.org/10.1016/0016-2361(86)90077-3" @default.
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