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- W2000202806 abstract "The hydroliquefaction of Yallourn coal was investigated in a batch micro autoclave, using halogen free organotin compounds as a catalyst precursor. The catalytic activities of tin compounds were compared as a function of reaction time, initial hydrogen pressure and catalyst concentration. All the organotin compounds studied showed moderate to good catalytic activity in the liquefaction of Yallourn coal. In the presence of 1 wt% of tetra- n -butyl tin ( n - Bu 4 Sn ) as Sn, at 698 K under an initial hydrogen pressure of 5.0 MPa in a non-hydrogen donating solvent, 1-methyl-naphthalene, coal conversion was increased from 36.7% to 78.6% with catalyst. An amount of hydrogen transferred to coal from the gas phase also increased from 0.8 to 1.6 wt% of d.a.f. coal with the 1 wt% of n - Bu 4 Sn . An increase in the catalyst concentration of more than 2 wt% did not show any remarkable change in coal conversion or the amount of hydrogen absorbed. After the reaction time of 20 min, coal conversion, yield of asphaltene and yield of oil fraction levelled off. An increase in the initial hydrogen pressure substantially affected the catalytic activity of n - Bu 4 Sn . Catalytically active species derived from n - Bu 4 Sn seem to activate molecular hydrogen and may transfer hydrogen directly to coal fragment radicals to stabilize them." @default.
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- W2000202806 date "1986-06-01" @default.
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- W2000202806 title "Hydroliquefaction of Yallourn coal catalysed by organotin compounds" @default.
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