2-(Hydroxyethyl)imidazole: A Key Marker for MEA Oxidation

4 Pages Posted: 8 Apr 2019 Last revised: 7 May 2019

See all articles by Rowena West

Rowena West

affiliation not provided to SSRN

Alicia Reynolds

Federation University Australia - Carbon Technology Research Centre

T. Vincent Verheyen

Federation University Australia - Carbon Technology Research Centre

Abstract

The oxidative loss of aqueous amines is a significant operating expense for the post-combustion capture (PCC) of CO2 from fossil fuel-fired power stations. A distinctive UV chromophore present in the MEA oxidation product, 2-(hydroxyethyl)imidazole (HEI), has excellent potential for on-line monitoring the oxidation of alkanolamines such as MEA (monoethanolamine). The characteristic ring structure present in this molecule (and its analogues) is responsible for the UV chromophore. Previous work has readily measured HEI absorbance in degraded alkanolamines from Australian PCC pilot plants. HEI absorbance correlates strongly with the traditional more difficult indicator of amine oxidation, i.e. heat-stable salt (HSS) concentration. This study aims to confirm the theoretical basis for the use of HEI (and its analogues) as indicators of MEA (and other alkanolamine) oxidation.

Keywords: PCC: Amine degradation, GHGT-14

Suggested Citation

West, Rowena and Reynolds, Alicia and Verheyen, T. Vincent, 2-(Hydroxyethyl)imidazole: A Key Marker for MEA Oxidation. 14th Greenhouse Gas Control Technologies Conference Melbourne 21-26 October 2018 (GHGT-14) . Available at SSRN: https://ssrn.com/abstract=3365717

Rowena West

affiliation not provided to SSRN

Alicia Reynolds (Contact Author)

Federation University Australia - Carbon Technology Research Centre ( email )

Northways Rd
Churchill, Victoria 3824
Australia

T. Vincent Verheyen

Federation University Australia - Carbon Technology Research Centre

Churchill, Victoria 3824
Australia

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