PRODUCTION OF CLEAN PRODUCER GAS WITH HIGH HEATING FROM BIOMASS BY AIR GASIFICATION USING TWO-STAGE GASIFIER
A great interest in environment-friendly alternative energy resources that can reduce dependency on fossil fuels has been growing. In particular, among a number of alternative energy resources, biomass is seen to play an important role both as chemical feedstock and as an alternative to fossil fuels. The conversion of biomass to chemicals usually takes place via thermo-chemical and bio-chemical technologies. Among thermo-chemical conversion, gasification converts biomass into combustible gases, such as H2, CO, CH4 that can be used in boilers and in internal combustion engine or turbine to produce electricity generation 1. During gasification of biomass, however, a large amount of tar is also formed. An average of 5,000 tons/day of woody wastes has been generated in Korea recently, and majority of them have been simply treated through incineration. Sewage sludge, usually disposed via ocean dumping in Korea, also as a biomass resource can be energetically utilized through gasification. The production of sewage sludge in Korea is continually increasing every year, amounting to 2.7 million ton/yr in 2006.This paper reports experimental results on the air gasification of biomass in a newly developed two-stage gasifier (Fig.1). In the experiments activated carbon was applied to reduce tar components in producer gas. In experiments, the total amount of tar in producer gas was reduced sixfold when activated carbon was used in the upper reactor of the gasifier. The producer gases (inclusive of N2) that were obtained with the application of activated carbon had high hydrogen contents (24 vol％), and their lower heating values (LHVs) amounted to 11.6 MJ/Nm3.
Joo-Sik Kim Tae-Young Mun Bo-Sung Kang
Faculty of Environ.Eng., Univ.of Seoul,90 Jeonnong-Dong, Dongdaemun-Gu,Seoul 130-743, Korea
国际会议
成都
英文
123-128
2009-10-11（万方平台首次上网日期，不代表论文的发表时间）