LAUSR

Postcombustion processes based on membrane contactors and ionic liquids have emerged in recent years as an alternative to traditional systems used to capture CO2. In this work, nondispersive absorption in a polyvinylidene fluoride (PVDF) hollow fiber membrane contactor was used as a CO2 capture system. The ionic liquid (IL) 1-ethyl-3-methylimidazolium acetate ([emim][Ac]) was chosen for the study due to its chemical reaction with CO2. Different amounts of distilled water were added to [emim][Ac] to address the issues associated with the viscosity of the ionic liquid. The presence of water may also facilitate the binding of CO2. The purpose of this combined sorbent containing water and an ionic liquid comprising a carboxylate moiety such as acetate, which provides reversible chemical interaction with CO2, was to achieve competitive efficiencies with traditional processes based on power stations and alkanolamines. The best combination of water–IL was found to be, 70% [emim][Ac]–30 vol % water. This mixture ...