High redox performance of Y0.5Ba0.5CoO3−δ for thermochemical oxygen production and separation,Reaction Chemistry & Engineering

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High redox performance of Y0.5Ba0.5CoO3−δ for thermochemical oxygen production and separation
Reaction Chemistry & Engineering ( IF 3.4 ) Pub Date : 2019-12-16 , DOI: 10.1039/c9re00430k
M. Ezbiri _{1,

2,

3,

4} , A. Reinhart _{1,

2,

3,

4} , B. Huber _{1,

2,

3,

4} , K. M. Allen _{4,

5,

6,

7} , A. Steinfeld _{1,

2,

3,

4} , B. Bulfin _{1,

2,

3,

4} , R. Michalsky _{1,

2,

3,

4}

Affiliation

The efficient production and separation of oxygen is essential for numerous energy-intensive industrial applications in the fuel and mineral processing sectors. A thermochemical redox cycle is considered for separating oxygen from atmospheric air and other gas mixtures using solar or waste process heat. Based on electronic structure (DFT) computations Y_0.5Ba_0.5CoO_3−δ is selected as a redox material, which surpasses the redox performance of state-of-the-art Cu₂O. The thermochemical oxygen production is experimentally demonstrated by applying a temperature/pressure swing between 573 K at 0.2 bar O₂ and 873 K at 1 bar O₂. An energy balance shows the feasibility of using process waste heat from the solar thermochemical CO₂/H₂O splitting cycle and the potential to compete vis-a-vis with cryogenic distillation. Exploratory runs with a packed-bed reactor indicate the potential of both thermochemical oxygen production and separation for scale-up and industrial implementation.

中文翻译：

Y0.5Ba0.5CoO3-δ的高氧化还原性能可用于热化学氧气的生产和分离

氧气的高效生产和分离对于燃料和矿物加工领域的众多能源密集型工业应用至关重要。热化学氧化还原循环被认为是利用太阳能或废热将氧气从大气和其他气体混合物中分离出来的方法。根据电子结构（DFT）计算，选择Y _0.5 Ba _0.5 CoO _{3− δ}作为氧化还原材料，它超过了最新的Cu ₂ O的氧化还原性能。温度/压力在0.2 bar O _2下的573 K和873 K在1 bar O _2上的摆幅。能量平衡显示了使用过程中的废热从太阳能热化学CO的可行性₂ / H ₂ ö分裂周期和潜在竞争可见，以对比用低温蒸馏。填充床反应器的探索性运行表明了热化学氧气生产和分离的潜力，可用于规模扩大和工业实施。

更新日期：2019-12-16

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