Gasification and power generation characteristics of woody biomass utilizing a downdraft gasifier
2011
Son, Young-Il | Yoon, Sang Jun | Kim, Yong-Ku | Lee, Jae-Goo
Energy utilization from biomass resources has started to attract public attention as a method to reduce CO₂ emissions. In this study, the characteristics of syngas production from biomass gasification were investigated in a downdraft gasifier that was combined with a small gas engine system for power generation. Syngas temperatures from the gasifier were maintained at a level of 700–1000Â °C. When the air ratio for gasification was 0.3–0.35, the low heating value of syngas was 1100–1200Â kcal Nm⁻³ and the cold gas efficiency 69–72%. Tar concentration in raw syngas was around 3.9–4.4Â g Nm⁻³. Syngas combustion in the gas engine after purification showed that HC concentration was below 200Â ppm, and NOx concentration was below 40Â ppm in the exhaust gas.
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