Abstract
Model compound and coal liquefaction experiments have been carried out in a stainless steel tubular reactor at 450/sup 0/C to observe the effects of hydrogen transfer on solvent isomerizaton. Significant observations are that: (1) methylindan production from tetrain in the presence of dibenzyl was found to take place by at least two different mechanisms, only one of which involved the normal cracking of dibenzyl; (2) deuterium-hydrogen isotope studies with model compounds and coal liquefaction have indicated that kinetic data from the model compound experiments should be applied to coal liquefaction only with caution; and (3) solvent isomerization by ring contraction is a problem in recycle operation due to the low hydrogen donor capability and exceptional stability of the rearranged product. Results on other parts of the project are discussed briefly.
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