Abstract
The effects of hydrogen shuttling encountered in coal liquefaction have been discussed by using 2- and 3-ring azaaromatics and aromatic hydrocarbons as hydrogen shuttlers in the hydrogenolysis of 9-benzylphenanthrene in tetralin at 430 °C. The azaaromatics show higher hydrogen shuttling ability than the aromatic hydrocarbons with iso-electronic structures. Phenanthridine is the most effective due to its superior hydrogen shuttling ability and high stability at elevated temperatures. The optimum molar mixing ratio of phenanthridine and tetralin has been determined to be 1:5.
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