Boosting CO2 hydrogenation to methane over Ni-based ETS-10 zeolite catalyst

The activation and conversion of CO2 molecule has always been the most vexing challenge due to its chemical inertness. Developing highly active catalysts, which could overcome dynamic limitation, has emerged as provable and effective method to promote CO2 activation-conversion. Herein, ETS-10 zeolite-based catalysts, with the active nickel species introduced by in situ doping and impregnation, were employed for CO2 methanation. Conspicuous CO2 conversion (39.7 %) and perfect CH4 selectivity (100 %) were achieved over the Ni-doped ETS-10 zeolite catalyst at 280 oC. Comprehensive analysis, including X-ray diffraction, N2 adsorption-desorption, SEM, TEM, H2 chemisorption, CO2 temperature programmed desorption and X-ray photoelectron spectroscopy were performed. And the results indicated that the resulted hierarchical structure, high metal dispersion and excellent CO2 adsorption-activation capacity of Ni-doped ETS-10 zeolite catalyst played a dominant role in promoting CO2 conversion and product selectivity.