AN INVESTIGATION OF HYDROGEN-TRANSFER FROM NAPHTHENES DURING COPROCESSING

Hydrogen transfer from naphthenes to aromatics, coal, resid, and coal plus resid has been investigated at 430-degrees-C in a N2 atmosphere. The reaction of perhydropyrene (PHP) with anthracene (ANT) resulted in the formation of pyrene (PYR) and dihydroanthracene. The weight perce nts of the products formed varied according to the ratio of ANT:PHP us ed with a minimum appearing at a 2:1 weight ratio. Longer reaction tim es and high ANT:PHP ratios also yielded tetrahydroanthracene. Reaction s of Illinois No. 6 coal from the Argonne Premium Coal Sample Bank wit h PHP, ANT, and PYR resulted in higher coal conversion with PHP and lo wer with ANT and PYR. Reactions of PHP with resid resulted in less ret rogressive reactions occurring in the resid than with either PYR or AN T. Apparent hydrogen transfer from coal or resid to ANT was observed. Combining PHP with ANT or PYR with coal, resid, or coal plus resid yie lded higher conversions and less retrogressive reactions than with ANT or PYR alone. Hydrogen transfer occurred from PHP to ANT or PYR and t o the coal and resid as evinced by the increased conversion and the re action products obtained from the model system.