Abstract
Primary hydrogenation liquid of coal, SRC-II, was subjected to a catalytic upgrading reaction at 550°C, for different duration ranging from 0 to 60min. Changes in chemical structures of the upgraded oils, which are soluble in n-hexane, were correlated with severity of the upgrading reaction. Reference mass spectra on a wide range of components found in coal liquids formed by the upgrading reaction of SRC-II, were compiled to obtain a database. A mass spectral library search analysis method was applied for the estimation of product components.The structural changes that had occurred during the upgrading reactions, were estimated by mass spectral library search method and were compared with those derived previously by means of HPLC-1H NMR. A fairly good agreement between the two sets of results was obtained. Major products obtained by the reaction at 550°C for a duration of 60min amounted close to 50wt% of products yield, which consisted mostly of unsubstituted aromatic compounds of naphthalene, biphenyl, acenaphthene, fluorene, phenanthrene and pyrene.
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