Abstract: Using a laboratory two-stage fixed-bed reactor, the characteristics of decoupling gasification (DG) of beer lees, in comparison with that of traditional coupling gasification (CG), were investigated on tar yield, carbon conversion rate and gasification efficiency. Experimental results showed that under the reaction temperature of 550℃ for pyrolysis, 800℃ for gasification in DG and 800℃ in CG, water content of 40%(w) in the fuel and O2 content of 4%(j) in the gasification reagent, compared with CG, the tar yield was decreased by 35.3%, the gasification efficiency, carbon conversion rate and gas yield were increased by 4.0%, 18.4% and 20%, respectively in DG. Examination of the effects of water content in the fuel (0~80%, w), gasification temperature (800~900℃) and oxygen content in the gasification reagent (4%~6%, j) demonstrated that DG led to more considerable influences than CG did by causing higher H2 or CO content in the produced gas and higher carbon conversion rate.

Key words: decoupling gasification, biomass, beer lees, tar reforming, char catalysis

摘要： 利用固定床上下两段反应器，以酒糟为气化燃料，对比分析了解耦气化与传统耦合气化的焦油产率、碳转化率和气化效率的差异. 结果表明，在解耦气化热解温度550℃、气化温度800℃、耦合气化温度800℃、燃料含水量40%(w)和气化剂中氧含量4%(j)的条件下，相对于传统的耦合气化，解耦气化焦油产率降低了35.3%，气化效率、碳转化率和产气率分别提高4.0%, 18.4%和20%. 提高燃料含水量(0~80%, w)、气化温度(800~900℃)和气化剂中氧含量(4%~6%, j)，解耦气化的焦油产率降幅、生成气中H2或CO含量及燃料C转化率的增幅均比耦合气化高.

关键词: 解耦气化, 生物质, 酒糟, 焦油重整, 半焦催化