抄録
Hydrogasification of coal has been developed to produce methane as the substitute natural gas directly from coal. For the future operation of hydrogasification processes, the use of other carbonaceous materials such as waste plastics mixed with coal is under consideration. In this study, hydrogasification of polypropylene (PP) and polystyrene (PS) mixed with coal was carried out. Experiment was conducted using a unique batch reactor, which is able to control the reaction time optionally, at 1073K and under 7.1MPa of hydrogen atmosphere. Reaction time was varied from 1 to 80 seconds. Product distribution and temperature profile were investigated. As the result, promising products obtained from PP, PS respectively. Methane yield from the mixtures were noticeably greater than the values which was calculated. It is concluded that a synergistic effect for methane production was observed by also using PP or PS, not only with polyethylene as previously reported. It is suggested that the synergistic effect could occur with wide variety of plastics in the waste while high hydrogenation heat is released independently of its chemical structure.
