Abstract
Tetralin has been employed to liquefy coals as a hydrogen donor vehicle in spite of its weak solvent power for coals. Meanwhile, 1, 2, 3, 4-tetrahydroq-uinoline (THQ) partially reduced quinoline has not only as high solvent power for coals like quinoline, but also has hydrogen donating property. Furthermore, THQ is considered to be a liquid catalist concerned with hydrogen transfer. The reactions of coal liquefaction in tubing-bomb reactor with tetralin or THQ as a hydrogen donor vehicle under autogenous condition at 400°C were conducted. The relation between coal rank and vehicle (tetralin, THQ) on liquefaction of coals was studied.
The principal results were as follows;
1) The conversion to preasphaltene was not so different either in tetralin or in THQ.
2) The effect of conversion to asphaltene in THQ was larger than in tetralin.
3) In THQ, it was enable to convert coals to asphaltene more than 80% within 10min. in case of coal rank under daf C% 80.
These results support that THQ is more powerful and active vehicle than tetralin.
