Abstract
Sorption enhancement exhibits great potential as process intensification strategy to improve the extent of chemical reactions.Particularly, the selective removal of products or inhibiting components from the reactive gas mixture via in situ adsorption ontosolid sorbents may reducethermodynamic and kinetic constraints. Consequently, the present work investigates the kinetic effect of sorption-enhanced CO2 hydrogenation via dynamic experimentation under reaction conditions in the kinetic regime with sufficient distance from chemical equilibrium. In particular, H2O is selectively removed by adsorption at 280 and 330 °C and 2 bar on zeolite 3A. The experimental data are evaluated based on stoichiometric analysis for quantification of the kinetic effect of in situ water removal on CO2 hydrogenation. The results reveal that an improvement in reaction extent is obtained, which is caused by enhancement of the reaction rate in the kinetic regime, probably due to the less pronounced blockage of catalytic sites by water adsorption.
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