Chemical looping using novel perovskite-type oxygen carriers for hydrogen production

我们小组以前的工作表明，COCM中的相演变为具有各种氧容量分布的氧化物的复杂混合物。我的研究将集中在确定负责可用氧容量的阶段和作为循环功能的氧化还原电位的配置文件的调查。为了实现这一点，将研究每个氧化还原循环期间和之后材料的氧占有率。我们的目标是更好地了解氧占有率，晶格参数和化学势之间的关系，各种氧分压和温度，然后可以与在每个周期中产生的氢的量。此外，COCM在不同的还原/还原环境下的氧占有率的变化的动态响应的调查将允许一个动力学模型的发展，本研究的主要目的是制备高活性和高效的催化剂的COCM过程。通过这项研究，目的是深入了解如何定制COCM，以实现更高的氢气产率和整体工艺效率，考虑到其工业规模的实施。

Previous work in our group has shown that the phases in the COCMs evolve to a complex mixture of oxides with various oxygen capacity profiles. My research will be focusing on identifying the phases responsible for the available oxygen capacity and the investigation of the profile of redox potentials as a function of cycling. To achieve that the oxygen occupancy of the material during and after each redox cycle will be studied. We aim for a better understanding of the relationship between oxygen occupancy, lattice parameter and chemical potential for a variety of oxygen partial pressures and temperatures which can then be correlated with the amount of hydrogen produced in every cycle. Moreover, investigation of the dynamic response of the change of the oxygen occupancy of the COCM under differentoxidizing/reducing environments will allow for the development of a kinetic model.The main objective of this study is to fabricate highly active and efficient catalysts for the CLR process. Through this research, the aim is to get insight into how to tailor the COCMs in order to achieve higher hydrogen yields and overall process efficiency in view of its industrial scale implementation.