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OALib Journal期刊
ISSN: 2333-9721
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ca-fe/bentonite载氧体煤化学链燃烧反应特性
, PP. 1060-1067
Keywords: 钙基复合载氧体,化学链燃烧,流化床,循环反应性,煤,磨损
Abstract:
？以天然石膏粉、膨润土（bentonite）和fe（no3）3·9h2o为原料，通过机械混合造粒法制备了钙基复合载氧体。在小型流化床反应器中，水蒸气作为气化-流化介质，研究了温度、活性组分含量及循环次数对复合载氧体反应活性的影响，同时考察了不同煤种化学链燃烧反应特性。实验结果表明，caso4含量为60%，fe2o3为活性助剂的caso4-fe2o3/ben（ca-fe/ben）载氧体平均磨损速率为0.089%/h。反应温度为900℃时，碳转化率达到95%所需的时间为20.8min，co2平均干基浓度为95.99%，表现高的反应活性。10次氧化/还原反应后，co2平均干基浓度保持在80%，载氧体保持良好的循环反应活性。同时，实验发现高挥发分高灰分的煤种更适于煤的化学链燃烧，且co2浓度均保持在90%以上。粒径分布曲线表明循环反应中载氧体表现强的抗磨损能力。
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