Methanol mediated direct CO2 hydrogenation to hydrocarbons: Experimental and kinetic modeling study

Carbon dioxide can be utilized as a feedstock to produce chemicals and renewable fuels sustainably. CO2 hydrogenation hydrocarbons through methanol mediated pathway requires more detailed study, examining interactions between reaction processes leading different product selectivities. In this particular work, we propose kinetic model for the direct hydrocarbon products over an In2O3/HZSM-5 bifunctional catalytic bed. The includes based on Langmuir Hinshelwood Hougen Watson (LHHW) mechanism In2O3 catalyst combined with lump-type (MTH) HZSM-5 zeolite. Interestingly, could largely predict suppression of reverse water gas shift (RWGS) increase in yield compared formation case same conditions carried out only synthesis (In2O3). Further, by varying mass ratio individual components bed, it was demonstrated that higher outlet concentration achieved caused less RWGS shifted distribution slightly larger share hydrocarbons. These changes selectivity variation were both also successfully reproduced model. Therefore, comparison experimental results predictions shows model, including equilibrium effects reactions, accurately trends findings catalyst.