Fe基氧载体的生物质化学链气化过程热力学分析及实验研究  

THERMODYNAMIC ANALYSIS AND EXPERIMENTAL INVESTIGATION OF CHEMICAL-LOOPING GASIFICATION OF BIOMASS WITH Fe-BASED OXYGEN CARRIERS

作　　者：黄振[1] 何方[1] 李新爱[1,2] 赵坤[1] 李海滨[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]中国科学院大学,北京100049

出　　处：《太阳能学报》2013年第11期1943-1949,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：通过热力学理论分析天然铁矿石(Fe2O3)为氧载体的生物质化学链气化的可能性。在小型鼓泡流化床上进行验证试验,验证结果与理论分析基本一致。赤铁矿作为氧载体参与生物质气化过程,活性氧载体的存在使生物质的热转化过程明显区别于单纯的热解,气体产率显著提高,气体产物中CO和H2含量达到80%以上。被还原后的氧载体主要以FeO状态存在,气化反应中氧载体表现出逐步失氧的过程,即Fe2O3→Fe3O4→FeO,还原氧载体经空气氧化后能恢复其晶格氧。Thermodynamic parameters and equilibrium composition of the reactions of chemical-looping gasification （CLG） of biomass with natural hematite （Fe203 ） as oxygen carrier were analyzed using commercial software of HSC Chemistry 5. 11. The feasibility of the CLG of biomass with hematite was verificated in a bubbling fluidized bed. It was showed that the experimental results are consistent with the theoretical analysis. The presence of natural hematite could significantly affect the conversion process of biomass, improving the yields of the gas products. It was observed that the gas content of CO and H2 was over 80% in CLG of biomass. The reduced hematite was mainly found in the form of FeO. It was observed that the reduction of hematite occurs in a stepwise manner in the CLG of biomass, namely,Fe2O3→Fe3O4→FeO. The reduced oxygen carrier of donating its oxygen can restore the lattice oxygen by oxidation with air.

关 键 词：热力学 Fe基氧载体 生物质 化学链气化 

分 类 号：TK6[动力工程及工程热物理—生物能]