Evaluation of Hydrogen-donating Abilities of Coal Liquefaction Residues with Molecular Probes
1993 Volume 72 Issue 10 Pages 951-957
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1993 Volume 72 Issue 10 Pages 951-957
ydrogen-donating abilities of coal liquefaction residues (CLR) were evaluated in the temperature range of 380-450°C with four molecular probes such as bibenzyl, trans-stilbene, 9-benzylphenanthrene and benzophenone for the purpose of effective utilization of donatable hydrogens in CLR.
CLR stabilized arylmethyl radicals such as benzyl, 1-naphthylmethyl, 1, 2-diphenylethyl and 1, 2-dipheny1-3-(1-naphthyl)-1-propyl, and their magnitudes of steric hindrance affected the radical-capping ability of CLR.
Molecule-induced hydrogen atom transfer was also promoted by CLR, and its additive effect depended on the chemical affinities of the hydrogen acceptors with CLR and their hydrogen-accepting abilities.
