Low temperature methanation of CO2 on high Ni content Ni-Ce-ZrOδ catalysts prepared via one-pot hydrothermal synthesis

Abstract

Ni-Ce-Zr-Oδ catalysts were prepared via one-pot hydrothermal synthesis. It was found that Ni can be partially incorporated into the Ce-Zr lattice, increasing oxygen surface species. The catalysts possess high surface areas even at high Ni loadings. The catalyst with Ni content of 71.5 wt.% is able to activate CO2 methanation even at a low temperature (200◦C). Its CO2 conversion and methane selectivity were reported at 80% and 100%, respectively. The catalyst was stable for 48 h during the course of CO2 methanation at 300◦C. Catalysts with the addition of medium basic sites were found to have better catalytic activity for CO2 methanation.