Highly effective conversion of CO2 into light olefins abundant in ethene

•Cr2O3(SG)/H-SAPO-34 shows a C2=?C4= selectivity of 95.7% in CO2 hydrogenation •Ethene accounts for more than 74% light olefins with an E/P ratio reaching 3.1 •Ethanol is formed through the reaction H3CO? and H? on Cr2O3(SG) converted into ethene SAPO-34 leads to high Conversion effective strategy sustainable utilization fossil energy biomass. However, highly selective production specific olefin, such as ethene, from challenge. Thus, new catalyst consisting oxide H-SAPO-34 zeolite fabricated. It hydrocarbons at 370°C 0.5 MPa. More interestingly, around are ethene/propene (E/P) 3.1, which three times that previously reported results. This catalytic performance well maintained least 600 h. In situ spectroscopy, DFT calculation, MD simulation results reveal ethanol, addition methanol, produced successive hydrogenations CH3COO? intermediate, generated H?. The ethanol quickly responsible primary olefin distribution.