Ec. Orr et al., AN EFFECTIVE COAL-LIQUEFACTION SOLVENT OBTAINED FROM THE VACUUM PYROLYSIS OF WASTE RUBBER TIRES, Energy & fuels, 10(3), 1996, pp. 573-578
Oil derived from vacuum pyrolysis of waste rubber tires was used as a
coal liquefaction solvent with a high-volatile A bituminous coal and a
Mo catalyst. The vacuum-pyrolyzed tire oil along with the Mo catalyst
was found to convert over 90% (daf) of the coal to gas, oil, and asph
altenes. Reactions were carried out in tubing reactors heated to 430 d
egrees C under 1000 psig (cold) of hydrogen gas. The vacuum-pyrolyzed
tire oil (PTO) obtained from waste rubber tires contained various poly
aromatic molecules which have been shown to be beneficial in coal liqu
efaction. Coal conversion was found to be hydrogen pressure dependent
for reactions where coal and PTO were coprocessed together. Conversion
results show that most of the coal reacted within the first 10 min of
coprocessing. Electron probe microanalysis (EPMA) detected the presen
ce of Mo inside coal particles after 20 min of coprocessing coal and P
TO.