Production of light olefins by catalytic hydrogenation of CO2 over Y2O3/Fe-Co modified with SAPO-34

Direct conversion of CO2 to hydrocarbons by hydrogenation was used in the production of light olefins. Hydrothermal coating and physical blending procedures were used to synthesize Y2O3/Fe-Co-SAPO-34 in this study. Based on the results from characterization, a unique micro-mesoporous structural composite with co-existing basic and acidic sites was obtained without any excessive close-fitting between the active sites in the physically blended composite. The catalyst's overall selectivity for the light olefins was 82.6% with CO2 conversion of 19.9% for H-2/CO2 of 3.0, with space velocity of 10 L.g.(cat)-1 h(-1) at 400 ? and 20 bars. Furthermore, an increase in the number of acidic-basic sites, meso-microporous structures, alongside the synergetic effects of the compositephases over the catalyst without any support, improved the catalyst's activity for CO2 conversion which in turn yielded higher C-2=-C-4= selectivity. The hybrid catalyst had a commendable stability within 80-hours of operation without losing its activity