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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。
Thermogravimetry-infrared spectroscopy was used to carry out experiments on iron-based biomass chemical chain gasification with pine wood as the research object. The chemical vaporization of biomass under nitrogen atmosphere was analyzed, and the effect of Fe2O3 as oxygen carrier The role played in the biomass gasification process, the effect of temperature on the chemical chain gasification process of the biomass and the gas composition of the syngas, the comparative experiment under the steam atmosphere, and the calculation of the biomass gasification reaction kinetics Learning parameters. The results showed that there were three weightless peaks during the gasification reaction of pine under the action of oxygen carrier, and the weightless peak at high temperature was caused by the gasification reaction of biomass. Between Fe2O3 and the semi-coke and pyrolysis intermediate of biomass, As a whole, the endothermic reaction takes place when the reduction reaction takes place. It is feasible to use Fe2O3 as a carrier for chemical gas chaining of biomass. The experimental results show that the oxygen carrier has an activation effect on the biomass gasification process.