Kinetics of Carbon Dioxide Absorption by Nonaqueous Solutions of Promoted Sterically Hindered Amines

Reactive kinetics of carbon dioxide loaded aqueous blend of 2‐amino‐2‐ethyl‐1,3‐propanediol and piperazine using a pressure drop method

“…The addition of PZ to sterically hindered alkanolamines and MDEA was found to be an aggressive cosolvent that can enhance the reaction rate effectively. Similarly, Duatepe et al . and Ume et al .…”

“…Kinetics of PZ/MDEA and PZ‐AMP mixtures have been investigated in detail by many researchers for a wide range of alkanolamine concentration with the effect of temperature and pressure been satisfactorily incorporated. Apart from this, kinetics of PZ/DEEA, PZ/K 2 CO 3 , PZ/AMPD, and PZ‐AEEA have been explored with similar promising results. The addition of PZ to sterically hindered alkanolamines and MDEA was found to be an aggressive cosolvent that can enhance the reaction rate effectively.…”

“…The reaction between given species was registered by change in conductivity. This method is deeply investigated and well established . However, the rapid reaction of carbon dioxide did not incorporate the effect of carbamate reversion/hydrolysis and formation of bicarbonate and carbonate species.…”

The enhanced enzymatic performance of carbonic anhydrase on the reaction rate between CO2 and aqueous solutions of sterically hindered amines

“…Previously, we found that sterically hindered primary amines (AEPD and AMPD) have a high capacity for CO 2 capture but relatively slow reaction kinetics 26 . It has been studied that the reduced chemical reaction rate could be enhanced by adding highly active amine promoters, such as cyclic polyamines 27 . In this study, we investigated an alternative promoter and proposed a novel approach for the enzymatic enhancement of CO 2 capture using carbonic anhydrase (CA), also called carbonate dehydratase, to improve the reaction rates of select SHAs for the first time.…”

An experimental/computational study of steric hindrance effects on CO2 absorption in (non)aqueous amine solutions

“…Numbers of kinetic studies for reactions between CO 2 and sterically hindered amines in both nonaqueous and aqueous solutions have been performed using the stopped-flow technique. While most of them only focus on the absorption performance of different hindered amines, 30 the kinetic model of the rate constants to predict reactions rates of amines, 31 or the qualitative effects of steric hindrance on the reaction rate still remains unclear. 32 In addition, several studies have also been conducted in our group, in which Liu and Luo et al 33 have observed that the base-catalyzed hydration mechanism is precise in predicting the CO 2 absorption rates in hindered amines (2-(isopropylamino) In the present study, we probe CO 2 absorption reaction with amines in nonaqueous/aqueous solutions, excepting that the reaction mechanisms of sterically hindered amine (AMP) can be verified in both nonaqueous and aqueous solutions, compared to that of primary amine (monoethanolamine (MEA)) and tertiary amine (methyldiethanolamine (MDEA)).…”