Methyltriphenyl-Phosphoinum Bromide-Based Dess for Flue Gas Decarbonization: Experimental and Simulation Approach

In this work three different methyltriphenylphosphonium bromide based deep eutectic solvents (DESs) were synthesized and their ability to capture CO₂ was experimentally investigated. Ethylene glycol, diethylene glycol and glycerol were used as hydrogen bond donor for DESs synthesis. The CO₂ uptake in DESs were measured using pressure drop method at different temperature and pressure. Critical properties of synthesized DESs were calculated using “Modified VFT” equation. Peng-Robinson equation of state was used to model the experimental vapor liquid equilibria data of CO₂/DESs system. In addition, flue gas decarbonization process was simulated using predicted properties data and experimental VLE data. Sensivity analysis was employed to the DESs-based process to obtain the optimal parameters. In addition, heat integration was used to further lower down the energy requirement.