A review of research on perovskite oxygen carrier for chemical looping reforming of methane

The chemical looping reforming of methane can simultaneously produce synthesis gas and high-purity hydrogen, and efficiently capture CO₂ during the hydrogen production process, which is of great significance for achieving the “dual carbon” goal. The selection of high-performance and low-cost oxygen carriers is crucial for the chemical looping reforming of methane. Due to its abundant oxygen vacancies and good thermal stability, the perovskite oxygen carriers have become a research hotspot as the oxygen carriers required for the chemical looping reforming of methane. In this review, the chemical looping reforming of methane including chemical looping steam methane reforming, chemical looping dry reforming of methane and chemical looping partial oxidation reforming of methane was first introduced. Then, the latest research progress on the Fe based, Ni based and Mn based perovskite type oxygen carriers as well as the supported perovskite oxygen carriers was summarized. Moreover, the pore structure, surface morphology, redox performance, and reaction mechanism of different metal-based perovskite oxygen carriers were analyzed and compared. Finally, the challenges and development prospects faced by perovskite oxygen carriers were summarized.