Mechanically Stable Mixed Metal Oxide of Cu and Mn as Oxygen Carrier for Chemical Looping Syngas Combustion
Mechanically Stable Mixed Metal Oxide of Cu and Mn as Oxygen Carrier for Chemical Looping Syngas Combustion
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DOI：
10.1021/acs.energyfuels.6b01433
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发表时间：
2016-09
期刊：
影响因子：
5.3
通讯作者：
S. Sajen;Sunit K. Singh;Pallavi Mungse;S. Rayalu;Kosuke Watanabe;G. Saravanan;N. Labhasetwar
中科院分区：
文献类型：
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作者：
S. Sajen;Sunit K. Singh;Pallavi Mungse;S. Rayalu;Kosuke Watanabe;G. Saravanan;N. Labhasetwar
化学链燃烧具有从碳基燃料（包括热电厂）中分离CO2的固有优势，其将通过碳捕获和封存提供有效的CO2排放缓解。本文采用共沉淀法合成了一种稳定的可再生的Cu和Mn混合过渡金属氧化物（CuMn2O4），并对该氧化物进行了合成气燃料氧化的多相催化性能测试。结果表明，在填充床反应器中，90%的CuMn2O4载氧能力可用于合成气的氧化，转化效率几乎为100%。在所有测试的循环中，CO和H2的转化效率没有显著改变。CO2和H2O是合成气转化的唯一产物。在800 °C下，还原产物（Cu和MnO）的空气氧化可使CuMn2O4相再生。利用最大携氧量可以减少载氧体在空气和烟道气之间的循环次数，提高循环效率。
Chemical looping combustion possesses an inherent advantage of separation of CO2 from the carbon based fuels including thermal power plants that would offer effective mitigation of CO2 emissions through carbon capture and sequestration. In this study, a stable and regenerative mixed transition metal oxide of Cu and Mn (CuMn2O4) is synthesized through coprecipitation method and tested for multicycle performance for the oxidation of syngas as fuel. It was observed that 90% of the oxygen carrying capacity of CuMn2O4 can be utilized for the oxidation of syngas with almost 100% conversion efficiency in a packed bed reactor. The conversion efficiency of both CO and H2 was not altered significantly in all the tested cycles. CO2 and H2O were the sole products of syngas conversion. The phase of CuMn2O4 can be regenerated solely by aerial oxidation of the reduced products (Cu and MnO) at 800 °C. Utilization of maximum oxygen carrying capacity can reduce the circulation frequency of oxygen carrier between air and fu...