Abstract
Liquefaction of mixtures of an Illinois bituminous coal and a caustic lignin was studied. Reactions were conducted at an initial hydrogen pressure of 1.1 MPa and at a temperature of 375°C, in tetralin. The liquid product from the coal-lignin mixture contains a lower fraction of the undesirable benzene insolubles than the product for coal alone. Size-exclusion chromatography studies indicate that, with the coal-lignin mixture, the weight-averaged molecular weight for the overall liquid product is lower than the molecular weight obtained by reacting coal or lignin alone
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