Understanding the interaction between active sites and sorbents during the integrated carbon capture and utilization process

The distance between catalytic sites (Ni) and sorbents (CaO) on the performance of integrated CO2 capture utilization (ICCU) process is crucial important because demonstrate a dramatic volume increase during carbonation reaction (1st stage ICCU) sequentially cover retard conversion (2nd ICCU). Herein, we synthesized various Ni/CaO-based dual functional materials (DFMs) with different distances active to provide spaces for growth CaCO3 reaction. It found that both 1%NiCaO 10%NiCaO by one-pot method exhibited low (38% 45%, respectively) CH4 selectivity (58% 69%, as was so close Ni were covered formed With physical mixing method, 1%Ni/CeO2-CaO-phy largely increased 62% 84%, respectively at 550 °C atmospheric pressure when captured from 15% CO2/N2. This attributed fact still well dispersed surface CeO2 nanorods instead being newly CaCO3.