Kinetics of the Reaction of CO₂ with Aqueous Formulated Solution Containing Monoethanolamine, N-Methyl-2-pyrrolidone, and Diethylene Glycol

Abstract

The kinetics of the reaction of CO 2 with aqueous formulated solutions containing 50 wt % N-methyl-2-pyrrolidone (NMP) and 10 wt % diethylene glycol (DEG) (relative to water) and various amounts of monoethanolamine (MEA) were studied in a stirred cell reactor with an undisturbed gas-liquid interface at 303 K, using the fall in pressure technique. The MEA concentration in the formulated solution was varied in the range 1.5-2.5 kmol m -3 . The densities and viscosities of these amine solutions were measured. The physical properties such as solubility and diffusivity of CO 2 in these amine solutions were estimated using N 2 O analogy. The overall reaction could be regarded as a reaction between CO 2 and MEA in parallel with the reaction of CO 2 with NMP.

CO2‐Alkanolamine Reaction Kinetics: A Review of Recent Studies

“…(4)), thereby suggesting that zwitterion deprotonation is instantaneous. The reaction of CO 2 with MEA has been recently revisited in [18][19][20][21] and these studies are presented in Tab. 2.…”

Solubilities of carbon dioxide in aqueous solutions of sodium glycinate

“…Especially, aqueous MEA solutions have been widely used as an industrially important absorbent because of its rapid reaction rate, the low cost of the solvent, the thermal stability, and low solubility of hydrocarbons as well as high alkalinity. However, the aqueous MEA solutions have a disadvantage due to its degradation through oxidation of the amine, high enthalpy of reaction, and also it causes operational problems such as foaming, corrosion and fouling of the process equipment [11,12]. Tertiary alkanolamines such as an aqueous MDEA solution are better than primary and secondary alkanolamines such as aqueous MEA and diethanolamine (DEA) solutions as they have the properties of high loading capacity, less regeneration energy, and high resistance to thermal degradation, but reaction rates of tertiary alkanolamines are low [11,13,14].…”

One-Pot Synthesis of N,N′-dialkylureas via Carbonylation of Amines with CO2 Applying Y0.08Zr0.92O1.96 Mixed Oxide (YSZ-8) as a Heterogeneous Catalyst

“…This result could be ascribed to the stronger inductive effect on CO 2 with aprotic solvents of higher polarity. For instance, NMP is an excellent choice for such a combined physical and chemical trapping of CO 2 , as it not only absorbs CO 2 , but also stabilizes the ionic intermediates of the chemisorptions [40].…”