CO₂ Capture-Mineralization for Calcium-Looping Integrated with Methane Dry Reforming

Chemical absorption of carbon dioxide using monoethanolamine (MEA) is a well-established method for postcombustion CO2 capture. In this study, we aimed to integrate (1) the MEA-based CO2 capture with the regeneration of MEA using calcium-based mineralization, followed by (2) direct utilization of captured CO2 to form syngas via a calcium looping-based dry reforming of methane (CaL-DRM), an interfacial catalytic process. The results show that room-temperature CO2 capture-MEA regeneration was achievable by using calcium-based mineralization. The formed Ni-Ca material was shown to be active for converting the captured CO2 into syngas via the CaL-DRM reaction at 600 °C. A 10-cycle stability test confirmed the operational stability of the Ni-Ca material, with consistent CO2 uptake capacity (XCO2 = 6.1-6.3 mmol/gsample) and stable syngas yields (YH2 = 14.2-14.5 mmol/gsample, YCO = 12.1-12.9 mmol/gsample). These results demonstrate the feasibility of integrating CO2 capture-mineralization with CaL-DRM, offering a sustainable and energy-efficient pathway for CO2 utilization and syngas generation.