关键词: 生物质, 气流床气化, 慢速热解, 半焦

Abstract: Slow pyrolysis as the pretreatment technology before biomass entrained flow gasification was experimentally studied, and its feasibility assessed. The chemical composition and conveying characters of semi-char produced in the pretreatment were analyzed. At the same time, the entrained flow gasification results of biomass and semi-char were compared based on ASPEN PLUS software. The results show that the energy density of semi-char increases with the pyrolysis temperature. The mass and energy yields of semi-char are beneficial to the biomass entrained flow gasification with the pyrolysis temperatures between 300 and 400℃. The angle of internal friction and angle of repose decrease obviously with increasing the pyrolysis temperature. And the bulk density of semi-char is improved evidently with increasing the pyrolysis temperature. Based on the analysis with ASPEN PLUS, the entrained flow gasification result is most ideal when the pyrolysis temperature is 400℃.

Key words: biomass, entrained flow gasification, slow pyrolysi, semi-char