在固定床管式炉中以氩气为介质，在添加水蒸气的条件下，对稻秆常规气化和化学链气化过程进行了研究，并对比了分析纯 Fe₂O₃ 与赤铁矿的循环特性。研究结果表明: 常规气化或者无水蒸气条件下的化学链气化效率均不高，水蒸气和氧载体的联合对气化过程存在显著的促进作用，二者的共同作用可以显著提高 H₂ 的产气率，碳转化率和气化效率均能达到 80% 左右; 在温度为 850 ℃，水蒸气泵转速为 1. 2 r/min 以及Fe₂O₃ /C 的摩尔比为 0. 25 时，产气率、气化效率和碳转化率达到较佳平衡; 温度的提高可以促进气化反应，但容易导致氧载体失活; Fe₂O₃ 氧载体在气化过程中主要转化为Fe₃O₄，在多次循环反应后，氧载体的反应性能下降; 与纯 Fe₂O₃ 相比，赤铁矿在循环气化过程中表现为较好的稳定性。

Conventional gasification and chemical looping gasification process of rice straw were studied in a fixed bed tubular furnace with argon as gasification medium and steam added． The cyclic characteristics of pure Fe₂O₃ and hematite as oxygen carrier were compared． The results show that the gasification efficiency of conventional gasi- fication or chemical looping gasification without steam was not high． The combination of steam and oxygen carrier has significantly positive effect on the gasification process，and can obviously improve the H₂ gas yield． At the same time，the carbon conversion efficiency and gasification efficiency can reach 80% ． The gas yield，gasification efficiency and carbon conversion efficiency are optimal，under the condition that the temperature is 850 ℃，the speed of steam pump is 1. 2 r/min，and the Fe₂O₃ /C molar ratio is 0. 25． Ｒaising temperature can promote the gas- ification reactions，but it can easily lead to oxygen carrier deactivation． The oxygen carrier is mainly converted into Fe₃O₄ during the gasification process，and the reactivity of oxygen carrier decreases after multiple redox cycles． Compared with the pure Fe₂O₃ oxygen carrier，hematite shows better stability in the process of cyclic gasification．