Use of monoethanolamine (MEA) for CO 2 capture in a global scenario: Consequences and alternatives

Recent research on CO2 capture is focusing on the optimization of CO2 absorption using amines (mainly monoethanolamine—MEA) in order to minimize the energy consumption of this very energy-intensive process and improve the absorption efficiency. Process optimization is always required and this research is worth and necessary. However, the main concern arises when thinking of the overall process: solvent production, solvent use and regeneration, and environmental effects related to its use/emissions. The production of MEA from ammonia involves important CO2 emissions during the Haber–Bosch process. The regeneration of the solvent after the absorption is also an indirect source of CO2 related to the use of fuels…