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

Abstract

Integrated CO 2 capture and utilization by dry reforming of CH 4 (ICCU-DRM) is an effective way to achieve CO 2 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 CH 4 and CO 2 keeps at 66% and 75%, respectively. Meanwhile, benefiting from the stable micro-structure, 10Ni-CaO-Ca 5 Al 6 O 14 maintains a high CO 2 conversion capacity of 0.44 g g −1 in the stability test with a CO 2 and CH 4 conversion of 78% and 63%. • Construction of DFMs by weaking negative effect between adsorbent and catalyst. • Enhancing and stabilizing CO 2 conversion capacity of DFMs by supports in ICCU-DRM. • Unveiling reaction characteristics of DFMs during single and cyclic ICCU-DRM.