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OALib Journal期刊
ISSN: 2333-9721
费用：99美元
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化学链制氢中fe2o3/lafeo3载氧体的性能研究
, PP. 1512-1519
Keywords: 化学链制氢,载氧体,柠檬酸络合法,钙钛矿,甲烷
Abstract:
？采用柠檬酸络合法制备fe2o3/lafeo3复合氧化物，将该氧化物作为化学链制氢过程的载氧体，在反应温度为900℃、常压下，对fe2o3/ch4（剂烷比）、进水量、金属负载量进行了考察。结果表明，剂烷比为2：1、进水量为0.1ml、质量分数15%fe时载氧体性能最好，甲烷转化率达到60%，单次循环氢气产量为45ml。将该评价结果与xrd和h2-tpr表征结果进行关联发现，反应过程的活性位不是金属氧化物，而是吸附氧，而且吸附氧越容易还原，甲烷转化率和氢气产量越高。通过连续60次还原-氧化循环发现，该载氧体上甲烷转化率和氢气产量比较稳定，循环后仍然保持钙钛矿结构。
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