2003 年 28 巻 1 号 p. 93-100
Gasification process for coal or waste plastics has been developed. Since in these conventional gasification technologies, partial combustion method is used, combustion gas is mixed in product gas. Therefore , in such partial combustion method, oxygen should be used for keeping high-concentration of valuable gas in th e product gas. However, if you use a raw materials of low heat value such as biomass, although oxygen is supplied to gasifier, concentration of valuable gas cannot be high. It suggests that a new concept which is different from conventional technologies should be established to obtain high-concentration valued gas from raw material s of low heat value. Internally circulating fluidized bed gasification is one of such new concepts of gasification