Studies on Gasification of Coal under Pressure Hydrogasification of Taiheiyo Coal under Non-isothermal Conditions

• Published in: Journal of the Fuel Society of Japan Vol. 60; no. 1; pp. 39 - 45
• Main Authors: MAKINO, Mitsunori, TODA, Yuzo, KATO, Tsutomu, KATO, Hitohisa, KOBAYASHI, Mitsuo, KAIHO, Mamoru, WATARI, Shinjiro, KIMURA, Hideo
• Format: Journal Article
• Language: Japanese; English
• Published: THE JAPAN INSTITUTE OF ENERGY 1981
• ISSN: 0369-3775; 2185-226X
• DOI: 10.3775/jie.60.39

In order to clarify the hydrogasification reaction of coal, the change in weight loss and the corresponding gaseous products were measured at various hydrogen pres-sures under non-isothermal conditions. The evolutions of gaseous hydrocarbons by hydrogasification began from about 420°C, reached their respective maximam rate at the same temperature of about 550°C and then decreased irrespective of the hydrogen pressure. After showing the minima at about 600°C, the formations of methane and ethane again increased to the clear second maxima. It was found that below 600°C the ratio of the formation rate of ethane to that of methane remained constant regardless of the reaction temperature, but increased with increase in hydrogen pres-sure. This suggests that some active portion of carbon in coal structure will simultaneously produce gaseous hydrocarbons including ethylene and propane. Above 600°C, methane was predominatingly produced from fixed carbons at a rate proportional both to the hydrogen pressure and to the weight of residual coal.