Synergistic promotions between CO2 capture and in-situ conversion on Ni-CaO composite catalyst

Bin Shao, Zhi-Qiang Wang, Xue-Qing Gong (), Honglai Liu, Feng Qian, P. Hu and Jun Hu ()
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Bin Shao: East China University of Science and Technology
Zhi-Qiang Wang: East China University of Science and Technology
Xue-Qing Gong: East China University of Science and Technology
Honglai Liu: East China University of Science and Technology
Feng Qian: East China University of Science and Technology
P. Hu: East China University of Science and Technology
Jun Hu: East China University of Science and Technology

Nature Communications, 2023, vol. 14, issue 1, 1-10

Abstract: Abstract The integrated CO2 capture and conversion (iCCC) technology has been booming as a promising cost-effective approach for Carbon Neutrality. However, the lack of the long-sought molecular consensus about the synergistic effect between the adsorption and in-situ catalytic reaction hinders its development. Herein, we illustrate the synergistic promotions between CO2 capture and in-situ conversion through constructing the consecutive high-temperature Calcium-looping and dry reforming of methane processes. With systematic experimental measurements and density functional theory calculations, we reveal that the pathways of the reduction of carbonate and the dehydrogenation of CH4 can be interactively facilitated by the participation of the intermediates produced in each process on the supported Ni–CaO composite catalyst. Specifically, the adsorptive/catalytic interface, which is controlled by balancing the loading density and size of Ni nanoparticles on porous CaO, plays an essential role in the ultra-high CO2 and CH4 conversions of 96.5% and 96.0% at 650 °C, respectively.

Date: 2023
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DOI: 10.1038/s41467-023-36646-2

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