Hydrate-based pre-combustion carbon dioxide capture process in the system with tetra-n-butyl ammonium bromide solution in the presence of cyclopentane

► Adding the CP into the TBAB-solution enhances the CO2 separation and shortens the induction time. ► The optimum volume ratios of CP/TBAB-solution and TBAB-solution/reactor are submitted. ► The CO2 concentration in the decomposed gas reaches 93mol% after the first-stage separation.