Steam Gasification of Biomass in a Fluidized Bed

• Main Authors: Kai-Cheng Yang, 楊凱成
• Other Authors: 吳耿東
• Format: Others
• Language: zh-TW
• Published: 2009
• Online Access: http://ndltd.ncl.edu.tw/handle/50203608009758052888

碩士 === 國立中興大學 === 森林學系所 === 97 === Gasification can be defined as the conversion procedure of carbonaceous feedstock, by partial oxidation at elevated temperature. In this study, gasification of wood-based materials including Cunninghamia lanceolata Hook., Pinus taiwanensis Hay., and Acacia confusa Merr., were conducted in a 30 kWth bubbling fluidized bed gasification system to investigate the effect of operating conditions on syngas products. The effect of steam injection was also discussed. The results show that the heating value of syngas decreases and the H2/CO ratio increases with increasing the gasification temperature. It can also be found that the yields of syngas, CO, H2 and CH4, decrease with increasing the ER respectively, but that of CO2 shows the contrary results. The variation of gas composition is not conspicuous, when the steam was injected into the gasifier. However, the heating value of the syngas and H2 content increase after injecting the steam.