以小型流化床为反应器、水蒸气为气化介质,在CaSO4氧载体中加入CaO颗粒进行煤气化-氧载体还原反应实验。实验结果表明,添加CaO改善了煤气化-CaSO4还原反应性能,提高了煤气化-CaSO4还原反应速率和CO2生成速率。但CaO添加剂的催化作用随反应温度的提高而减弱。900℃是较适宜的反应温度,此温度下加入适量CaO( CaO/CaSO4物质的量比1.18),气态硫化物释放得到显著抑制,SO2和H2 S降幅分别为63.19%和27.37%；同时,还能控制CO2被吸收固化成CaCO3的比例低于2%。%The reactivity between the CaSO4 oxygen carrier with CaO additive and coal under steam atmosphere was studied in a fluidized bed reactor. The experimental results show that the addition of CaO can improve the performance of both coal gasification and CaSO4 reduction, and increase the reaction rate of coal gasification and CaSO4 reduction and the CO2 generating rate. However, the catalysis of CaO drops as the reaction temperature rises. And the optimum reaction temperature is 900 ℃, at which the releases of gaseous sulfides are remarkably decreased by 63. 19% and 27. 37% for SO2 and H2S, respectively, as the molar ratio of CaO to CaSO4 is 1. 18. Meanwhile, the amount of CO2 absorbed by CaO can be controlled to less than 2% .
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