Jose PALOMAR 1, Elisa HERNANDEZ1, Daniel HOSPITAL1, Cristian MOYA1, Alejandro BELINCHÓN1, Rola EL BIJOU1, Jesus LEMUS1, Pablo NAVARRO1
1Universidad Autónoma de Madrid, Madrid, Spain
The combination of CO2 capture and conversion (CCU) to produce value-added chemicals is proposed as strategy to mitigate environmental impacts and resolve the cost for CO2 conditioning, transport and storage. Although there are several CCU pathways in the literature, there are not large-scale designs of CCU processes based on ionic liquids (ILs). Taking advantage of the reported bifunctionality of ILs, as CO2 chemical absorbents and CO2 conversion catalysts, this contribution summarized recent results on designing new valuable CCU systems using well-stated absorption and reaction techniques and bifunctional ILs. Separated and integrated CCU processes for propylene carbonate production based on trihexyl(tetradecyl)phosphonium 2-cyanopyrrolide ([P66614][CNPyr]) were successfully modelled utilizing the COSMO-based/Aspen methodology. The performance of both CCU approaches were evaluated attending to energy consumption, utility costs and net CO2 emissions. A novel integrated CCU process achieved promising energy and net CO2 emissions results, demonstrating not only that dual-functional ILs can be suitable materials for CCU but also the successful integration of IL-based carbon capture and utilization with enhanced process performance.1 Finally, the study is extended to different catalyst-product separation platforms covering techno-economical analysis (TEA) and life cycle assesments (LCA) for evaluating the sustainability of the new iCCU based on ILs.
E. Hernández, D. Hospital-Benito, C. Moya, R. Ortiz, A. Belinchón, C. Paramio, J. Lemus, P. Navarro, J. Palomar (2022). Integrated carbon capture and utilization based on bifunctional ionic liquids to save energy and emissions. Chemical Engineering Journal, 446, 137166.