(532ak) Ni-Doped CaxTiyO3 Perovskite As a Catalytic Sorbent for an Integrated CO2 Capture and Subsequent Dry Methane Reforming

CO₂ capture and utilization (CCU) is one of the efficient way to alleviate the climate emergency and produce value-added chemicals and fuels. Recently, an integrated CO₂ capture and utilization (ICCU) process have attracted great attention in ensuring simplified process and reducing total thermal energy required for the regeneration of sorbents. CO₂ capture and subsequent dry methane reforming in the cyclic ICCU employing catalytic sorbent have been proposed to convert two greenhouse gases (CO₂ and CH₄) into syngas (CO and H₂). However, during the dry reforming step, catalyst and sorbent materials undergo thermal sintering and coke deposition, leading to the decrease in CO₂ capture capacity and syngas productivity. Here, Ni-doped Ca_xTi_yO₃ perovskite materials were developed for their attractive sinter- and coke-resistance properties. In addition, the effect of Ca-to-Ti ratio on CO₂ capture and syngas production performances were investigated, and these perovskite materials were analyzed via XRD, H₂-TPR, and CO chemisorption.