Development of catalysts for fast, energy efficient post combustion capture of CO2 into water; an alternative to monoethanolamine (MEA) solvents

CO2 facilitated transport membrane promoted by mimic enzyme

“…In this two-step process, CO 2 is converted to HCO 3 -and the active sites in the mimic enzyme are left unreacted. The mechanism is further elaborated in equations 1-5 [20]. …”

“…A number of macrocyclic and tripodal complexes of zinc (II) and other metals have been reported to mimic the activity and the catalytic mechanism of CA in the CO 2 /HCO 3 -reaction cycle [20,21]. The mimic enzyme acts as a catalyst in the hydration of CO 2 in the same fashion as the bio-enzyme, i.e., CA [22].…”

“…The low molecular weight of the mimic enzyme leads to an additional benefit of a higher number of active sites per unit mass of compound, showing fast reaction rates comparable with the CA enzymes in terms of weight, hence providing cost-effective and more durable/stable substitutes for the CA enzymes [20].…”

“…Among many different "mimic enzymes" reported in the literature, Zn-cyclen was selected for study in this work based on its small cyclic structure, the highly hydrophilic nature of its ligands, its high kinetic rate constant and appreciably low heat of reaction [20,21].…”

Kinetics of absorption of carbon dioxide in aqueous MDEA solutions with carbonic anhydrase at 298K

“…CA is among others found in the blood of humans and other mammals, and facilitates the transfer of CO 2 during respiration. Genetic modification of this enzyme makes it possible to use it in combination with aqueous alkanolamine solutions within an industrial environment, like flue gas treatment (Davy, 2009). …”