46.石炭水素添加ガス化における共原料としてのポリエチレンの効果

概要

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Hydrogasification of coal has been developed to produce methane (SNG) directly from coal. For the future operation, co-feed of waste plastics with coal is under consideration in order to diversify feedstock. We had already studied the hydrogasification of polyethylene (PE) and coal/PE mixture in the ratio of 50:50. Significant synergistic effect on the methane production was observed when coal was mixed with PE. Considering an industrial application of hydrogasification process, it is important to obtain the knowledge about hydrogasification of a mixture with lower amount of plastics. In this study, coal/PE mixture hydrogasification was carried out, using lower concentration of PE in the samples. Reaction was conducted using a batch type reactor at 1073K and under 7.1MPa of hydrogen atmosphere. Reaction time was varied from 1 to 80 seconds. Product distribution was investigated with varying the ratio of coal/PE content. Methane yield from the mixtures were noticeably greater than the values which was calculated from the results obtained from coal and PE respectively with assuming no mutual influences. It is concluded that a significant synergistic effect was observed even when PE content was low. It is suggested that an efficient hydrogasification processes could be achieved by adding the lower content of plastics mixed with coal.
一般社団法人日本エネルギー学会の論文
2003-10-23