Abstract
Catalytic activities of various iron ores, hematite, limonite and magnetite, mixed with sulfur were examined in order to develop a disposable catalyst in direct liquefaction of coal. A catalytic mechanism of them was investigated with differential thermal analysis and X-ray diffraction analysis.
The following results were obtained; (1) Most of them were as active as or more active than red mud mixed with sulfur, which has been regarded as the catalyst, even under relatively mild liquefaction conditions and liquefaction products under the influence of them were rich in middle and light oils. Thus they are expected to become one of the catalysts; (2) The catalytic mechanism in the presence of them, except for magnetite, was supposed to be similar to that of Fe2O3 mixed with sulfur.
