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- W1995604274 abstract "The residues of hexane extraction of a highly volatile bituminous coal, pretreated under the conditions of the first stages of hydroliquefaction (T ≈ 350 °C), were studied by solid state high resolution 13C n.m.r. and FT-i.r. The catalysts used are non porous aerosols of Fe2O3, MoO3 and SnO2 with a very fine grain size (Φ ⩽ 0.05 μm), sulphided in situ in the course of the operation. The catalytic effect resides on the hydrogenolysis of bridging bonds, especially the ether type, between the polyaromatic units of the coal, as well as the hydrogenation of the latter, to give hydroaromatic structures (following the order of activity in tetralin solvent: Fe2O3 ≈ MoO3 ⪢ SnO2). The role of Fe2O3 as catalyst does not appear fundamentally different in a medium that is not a hydrogen donor (1-methylnaphthalene) as compared with a donor medium, even though the latter solvent is barely hydrogenated under conditions employed in this work." @default.
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- W1995604274 date "1988-07-01" @default.
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- W1995604274 title "Structural changes of highly volatile bituminous coal after catalytic hydrogenation at 350 °C, as revealed by 13C CP/MAS n.m.r. and FT-i.r." @default.
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- W1995604274 doi "https://doi.org/10.1016/0016-2361(88)90092-0" @default.
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