OS3-7 コーヒー滓ガス化におけるガス化炉内燃料滞留時間の影響(OS3 バイオマス・新燃料・環境技術,分散と集中の共存)

Abstract

This study is devoted to clarifying the biomass gasification characteristics in a lab-scale fluidized bed gasifier coupled to a pneumatic char combustor. The experimental parameter is fuel residence time in gasifier. It was shown that the conversions of C and H as well as the corresponding cold gas efficiency increased with increasing the fuel residence time in gasifier. Nonetheless, the increases in conversion and efficiency were confined to a few percents (<5%) when prolonging the time from 160s to 1200s. Corresponding to this, the increase of the fuel particle residence time from 3s to 160s resulted in much obviously increased fuel conversion efficiency. Consequently, for the tested gasification technology the required explicit fuel residence time in gasifier can be lower than 160s but must be above 3s in order to assure the finish of fuel pyrolysis.