Development of dual-functional materials for integrated CO₂ capture and utilization by dry reforming of CH₄

Integrated CO2 capture and utilization by dry reforming of CH4 (ICCU-DRM) is an effective way to achieve CO2 emission reduction and resource utilization. However, the process is still in preliminary development stage, and it lacks of efficient and stable dual-functional materials (DFMs) and full understanding of reaction characteristics of ICCU-DRM. In this work, various inert supported Ni/CaO DFMs were synthesized and evaluated by comprehensive adsorption-desorption, catalytic reaction and ICCU-DRM tests. Results show that 5Ni-5Zr/CaO/ SBA possesses a very good carbon deposition resistance. Almost no carbon deposition is produced in a continuous ICCU-DRM test for 20 cycles, while the conversion of CH4 and CO2 keeps at 66% and 75%, respectively. Meanwhile, benefiting from the stable micro-structure, 10Ni-CaO-Ca5Al6O14 maintains a high CO2 conversion capacity of 0.44 g g(-1) in the stability test with a CO2 and CH4 conversion of 78% and 63%.