Lattice Oxygen-Mediated Chemical Looping Dry Reforming: Advances in Material Design and Mechanistic Insights

Abstract

Chemical looping dry reforming of methane is a transformative technology that converts CH 4 and CO 2 into high-value syngas, bridging fossil fuel utilization with sustainable chemical production while effectively circumventing the severe carbon deposition that plagues conventional dry reforming. Central to this process is the regulation of lattice oxygen transport within oxygen carriers, as the dynamic balance between oxygen supply and surface reaction rates governs coking resistance and syngas efficiency. This review establishes lattice oxygen transport as the central performance descriptor, tracing its microkinetic origins, comparing structureactivity relationships across perovskite, fluorite, spinel, and composite oxide families, and discussing engineering strategies that spatiotemporally match oxygen supply with reaction demand.