Kinetics and mechanism of carbamate formation from CO2(aq), carbonate species, and monoethanolamine in aqueous solution | Health & Environmental Research Online (HERO)

Health & Environmental Research Online (HERO)

Print Feedback Export to File

This record has one attached file:

Citation
Tags

HERO ID

7428733

Reference Type

Journal Article

Title

Kinetics and mechanism of carbamate formation from CO2(aq), carbonate species, and monoethanolamine in aqueous solution

Author(s)

Mccann, N; Phan, D; Wang, X; Conway, W; Burns, R; Attalla, M; Puxty, G; Maeder, M; ,

Year

2009

Is Peer Reviewed?

Journal

Journal of Physical Chemistry A
ISSN: 1089-5639
EISSN: 1520-5215

Publisher

AMER CHEMICAL SOC

Location

WASHINGTON

Volume

113

Issue

Page Numbers

5022-5029

Language

English

PMID

19338322

DOI

10.1021/jp810564z

Web of Science Id

WOS:000265529800028

URL

https://pubs.acs.org/doi/10.1021/jp810564z
Exit

Abstract

Removal of carbon dioxide from fossil-based power generation is a potentially useful technique for the reduction of greenhouse gas emissions. Reversible interaction with aqueous amine solutions is most promising. In this process, the formation of carbamates is an important reaction of carbon dioxide. In this contribution, a detailed molecular reaction mechanism for the carbamate formation between MEA (monoethanolamine) and dissolved CO(2) as well as carbonate species in aqueous solution is presented. There are three parallel, reversible reactions of the free amine with CO(2), carbonic acid, and the bicarbonate ion; the relative importance of the three paths is strongly pH dependent. Kinetic and equilibrium measurements are based on (1)H NMR and stopped-flow measurements with rate constants, equilibrium constants, and protonation constants being reported.

Keywords

Amine solutions; Aqueous solutions; Carbonate species; Carbonic acids; Equilibrium measurements; Free amines; Kinetics and mechanism; Molecular reactions; Monoethanolamine; PH-dependent; Protonation constants; Relative importance; Reversible interactions; Reversible reaction; Stopped-flow measurements; Amines; Carbon dioxide; Complexation; Dissolution; Gas emissions; Global warming; Greenhouse gases; Leakage (fluid); Metal casting; Organic acids; Rate constants; Solutions; Equilibrium constants; carbamic acid derivative; carbon dioxide; carbonic acid derivative; ethanolamine; water; article; chemistry; kinetics; nuclear magnetic resonance spectroscopy; solution and solubility; synthesis; Carbamates; Carbon Dioxide; Carbonates; Ethanolamine; Kinetics; Magnetic Resonance Spectroscopy; Solutions; Water