Abstract
Addition of lignin to coal is synergetic in that it significantly improves the quality and yield of the liquid products produced from coal under relatively mild condition of pressure and temperature. This paper describes the stability of coal- and coal-lignin-derived liquid, because the usefulness of coal-derived liquids is dependent to a certain extent on their stability during storage. The stability of liquid products was characterized by determining their solubility in pentane and benzene, and by analyzing the change of boiling point and molecular weight distributions with aging condition. Percent of conversion, and individual atomic mass balances on various experiments conducted with coal, lignin and coal-lignin mixtures are also reported.
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