Fe_2O_3-水蒸气生物质化学链共气化制合成气  

SYNGAS GENERATED BY CHEMICAL-LOOPING GASIFICATION OF BIOMASS USING Fe_2O_3 AS OXYGEN CARRIERS IN PRESENCE OF STEAM

作　　者：黄振[1] 何方[1] 李新爱[1,2] 赵坤[1] 李海滨[1] 赵增立[1] 

机构地区：[1]中国科学院可再生能源与天然气水合物重点实验室,中国科学院广州能源研究所,广州510640 [2]中国科学院研究生院,北京100049

出　　处：《太阳能学报》2013年第12期2056-2062,共7页Acta Energiae Solaris Sinica

基　　金："十二五"国家科技支撑计划(2011BAD15B05);国家自然科学基金(51076154);广东省科技计划(2010B010900047)

摘　　要：在自行搭建的鼓泡流化床上,以氩气为流化介质,水蒸气为气化介质,对以Fe2O3为氧载体的生物质化学链气化开展研究。探讨氧载体的存在、水蒸气/燃料(S/B)、反应温度等因素对生物质化学链气化过程的影响。结果表明:氧载体的存在能显著改善气化效果,提高气体产率;水蒸气的增加能显著提高合成气中H2的含量,S/B在0.85附近时,能实现生物质气化过程气化效率、产气率、碳转化率等各项指标的最佳平衡;气化过程中的产气率、气化效率、碳转化率均随温度的提高而逐渐升高,但热值随温度的升高而稍有下降;同时,提高反应温度有利于提高合成气中H2、CO的相对浓度,而CO2、CH4浓度随着反应温度的提高而降低,H2/CO比率由700℃时的0.84上升至850℃时的0.92。Chemical looping gasification （CLG） of biomass with Fe2O3 as oxygen carrier was experimentally investigated in a bubbling fluidized bed with argon as fluidizing gas and steam as gasification medium. The effects of reaction temperature, steam/biomass （ S/B ）, and the presence of oxygen carriers on the gasification process were examined. The experimental results show that Fe2O3 can be used as oxygen carrier in CLG of biomass. The presence of oxygen carrier can enhance the gasification process and significantly improve the syngas yield. The total volume of the syngas increases from 125.0L of biomass gasification with Fe2O3-steam to 153.0L with silica sand- steam. Increasing S/B can significantly improve the content of H2 in the generated gas, and S/B of 0. 85 gives the best performance for chemical-looping gasification of biomass; Raising temperature can accelerate the gasification reactions, which cause the CO and H2 concentrations increasing slightly, while CO： and CH4 concentration declining slightly during biomass gasification. The H2/CO ratio increases from 0. 84 at 700℃ to 0. 92 at 850℃.

关 键 词：生物质 FE2O3 氧载体 化学链气化 合成气 

分 类 号：TK6[动力工程及工程热物理—生物能]