Self‐Regenerative Ni‐Doped CaTiO<sub>3</sub>/CaO for Integrated CO<sub>2</sub> Capture and Dry Reforming of Methane
Seong Bin Jo, Kandis Leslie Gilliard‐AbdulAziz
Abstract
Abstract In this work, a new type of multifunctional materials (MFMs) called self‐regenerative Ni‐doped CaTiO 3 /CaO is introduced for the integrated CO 2 capture and dry reforming of methane (ICCDRM). These materials consist of a catalytically active Ni‐doped CaTiO 3 and a CO 2 sorbent, CaO. The article proposes a concept where the Ni catalyst can be regenerated in situ, which is crucial for ICCDRM. Exsolved Ni nanoparticles are evenly distributed on the surface of CaTiO 3 under H 2 or CH 4 , and are re‐dispersed back into the CaTiO 3 lattice under CO 2 . The Ni‐doped CaTiO 3 /CaO MFMs show stable CO 2 capture capacity and syngas productivity for 30 cycles of ICCDRM. The presence of CaTiO 3 between CaO grains prevents CaO/CaCO 3 thermal sintering during carbonation and decarbonation. Moreover, the strong interaction of CaTiO 3 with exsolved Ni mitigates severe accumulation of coke deposition. This concept can be useful for developing MFMs with improved properties that can advance integrated carbon capture and conversion.