Recent studies on hydrogasification. Development of hydropyrolysis.:Development of Hydropyrolysis
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Hydropyrolysis is considered as the third way for coal conversion, because products can be controlled by reaction condition easily. In this paper we describe the recent studies on hydropyrolysis.<BR>A few company have built pilot plants to establish this technology . Product gas is mainly methane. Oil yield and its composition depend on the temperature of pyrolysis. The benzene content of the oil increase with temperature.<BR>It is considered that hydropyrolysis reaction consists of two step mechanism . High hydrogen pressure inhibit devolatilization and increases hydrogenation of the products formed in the first stage of the reaction. At high hydrogen pressure slow heating rate can even give higher total volatile yield than rapid heating . High oil yield is obtained when coal is prehydrogenated or inpregnated with catalyst.<BR>In hydropyrolysis mass transfer, heat transfer and chemical reaction occur simultaneously in very short time. The reaction mechanism is, therefore, so complicated that further investigation from various aspect are required.
- 一般社団法人 日本エネルギー学会の論文
一般社団法人 日本エネルギー学会 | 論文
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