Utilizing metal oxide enhancement for efficient CO2 capture and conversion in calcium-based dual-function materials.

Calcium looping cycle integrated CO 2 capture and conversion (CaL-ICCC) is a promising technology for addressing energy and environmental issues related to anthropogenic CO 2 emissions. This technology offers high efficiency, low cost, and enhanced safety, as it eliminates the need for purification, compression, transportation, and storage processes. To achieve integrated CO 2 capture and conversion (ICCC), the development of new and highly efficient catalysts is crucial. Dual functional materials (DFMs), which consists of absorbents and catalysts, playing a key role in bridging this gap. Recently, DFMs have garnered considerable attention, with a focus on the development of efficient, selective, and stable catalysts. This review summarizes the current advancements in metal oxide-doped CaO-based sorbents and metal oxide-supported catalytic conversion of CO 2 in the reverse gas shift reaction (RWGS), specifically in terms of absorbent and catalyst performance, selectivity, and stability. Additionally, the mechanism of CaO-based CO 2 capture and in-situ conversion in CaL-RWGS processes is discussed. The challenges and future prospects in terms of material stability and durability, technological and economic hurdles, dual functional material structures, and the application of AI technologies are also addressed. [Display omitted] • The performance of metal oxide doped CaO-based adsorbents were discussed. • The performance of metal oxide as supported in RWGS was discussed. • The mechanisms of absorbents and DFMs of CO 2 conversion were examined individually. • Potential future development trends were recommended in this work. [ABSTRACT FROM AUTHOR]