基于热重-红外联用分析的生物质化学链气化实验研究  

STUDY OF BIOMASS CHEMICAL-LOOPING GASIFICATION BY TG-FTIR

作　　者：赵坤[1,2] 何方[1] 黄振[1] 赵增立[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3期357-364,共8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：采用热重-红外联用的方法,开展以松木为研究对象的铁基生物质化学链气化实验研究,对生物质在氮气气氛下的化学链气化过程进行分析,探讨Fe2O3作为载氧体在生物质气化过程中所起的作用、温度对于生物质化学链气化过程以及合成气气体成分的影响;在水蒸气气氛下进行对比实验,并通过计算获得生物质化学链气化反应动力学参数。结果表明:松木在载氧体作用下发生气化反应过程存在3个失重峰,高温时的失重峰是由于生物质发生气化反应所致,Fe2O3与生物质半焦和热解中间产物之间发生还原反应时整体上表现出吸热特性,Fe2O3作为载氧体进行生物质化学链气化具有可行性。通过与水蒸气气氛下的对比实验表明,载氧体对生物质气化过程具有活化作用。Chemical looping gasification of biomass with Fe203 as oxygen carriers were carried out using thermo- gravimetrie analyzer coupled with Fourier transform infrared spectroscopy （TG-FTIR）. The effects of Fe203 as oxy- gen carriers in biomass gasification, the influence of temperature on biomass chemical looping gasification were in- vestigated in nitrogen atmosphere, and the gasification products were detected by gas chromatographic analyzer. Furthermore, a group of comparison experiments were carried out in steam atmosphere, and then the kinetic param- eters were calculated for biomass chemical looping gasification. The results showed that, the pine gasification process had three degradation peaks, the degradation peak at high temperature was due to the pine char gasification in the presence of Fe203. In general, the heterogeneous reactions process between Fe2O3 and the intermediate gas products of pine pyrolysis as well as the pine char exhibited endothermic characteristics. These all supported the feasibility of Fe203 as oxygen carriers for biomass chemical looping gasification. The contrast experiment showed that the presence of oxygen carriers is beneficial to biomass gasification.

关 键 词：TG-FTIR 载氧体 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]