Hydrate-based pre-combustion capture of carbon dioxide in the presence of a thermodynamic promoter and porous silica gels

► We examine the feasibility of the hydrate-based pre-combustion CO2 capture process. ► We examine the selective partition of CO2 in the hydrate phases. ► Concentrations of higher than 90% were achieved in the hydrate phase for all cases. ► The inclusion of THF induces structure transition to sII hydrate.