Simulation of Enthalpy and Capacity of CO₂ Absorption by Aqueous Amine Systems

Abstract

A model has been developed to predict the CO2 capacity of amine-based solvent systems as well as the enthalpy associated with absorption/desorption. This model can be used to accurately predict the behavior of well-characterized solvent systems under a range of different conditions. Alternatively, the model can be used to estimate the properties of less well-defined systems as part of an initial rapid screening procedure. Investigation into the effects of varying amine basicity and degree of carbamate formation indicates that there is considerable room for improvement on the standard MEA (monoethanolamine) system in terms of both capture capacity and enthalpy of CO2 desorption.

Process Characteristics of CO2 Absorption by Aqueous Monoethanolamine in a Microchannel Reactor

“…Aqueous MEA, as an important absorbent in the CO 2 removal process, has many advantages, such as high reactivity, low solvent cost, low molecular mass and thus high absorption capacity on a mass basis, reasonable thermal stability, etc [8]. Sometimes it can be used as an activator and mix with other amines [9,10].…”

Advances in Liquid Absorbents for CO2 Capture: A Review

“…McCann et al developed a model to simulate the absorption and desorption of CO 2 by MEA with focus on predicting the enthalpy associated with the processes. 19 CO 2 reacts with primary amine solutions like ammonia to form ammonium bicarbonate:…”

Solubilities of CO2 in 1-Allyloxy-3-(4-Nonylphenoxy)-2-Propanol Polyoxyethylene Ethers

“…The apparatus included a CO 2 gas cylinder (1), two water baths (2, 5), a CO 2 gas reservoir (GR, 3) with magnetic stirrer, a CO 2 gas equilibrium cell (EC, 4) with magnetic stirrer, and two pressure transmitters (6,7). The volumes of EC and GR were determined using the previous method 25 with the results of 141.61 cm 3 and 370.99 cm 3 , respectively.…”

“…[6][7][8] In recent years, ionic liquids (ILs), with features of non-volatility, thermal stability, and tuneable properties, 9 were proposed as the favoured options to overcome some of the problems with amines. [10][11][12] In addition, it is also inevitable to develop more versatile alternatives with respect to the price and environmental benignness.…”