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2009•Indian Journal of Science and TechnologyRequires access

A simple pH-based method for estimation of CO2 absorbed in alkanolamines

Asha Masohan, M. El-Zohry Ahmed, Sushil Kumar Nirmal, Ajay Kumar, Madhukar O. Garg

Open publisher page 5 citations

Abstract

CO 2 is recognized as a major contributor of global warming. We report a facile, sensitive and accurate method for estimating CO 2 content in the alkanolamine solvents. It can be applied to a host of alkanolamine solvents as well as solvent mixtures for screening for prospective absorbent for CO 2 capture. In this method, pH of the CO 2 -loaded absorbent sample is measured and referred to a reference pH graph of corresponding amine with sulphuric acid that is constructed under specific conditions. The authenticity of the method was validated from known amounts of CO 2 added in the form of CO 2 -saturated water to three different types of alkanolamines i.e. the primary (monoethanolamine, MEA), secondary (diethanolamine, DEA) and tertiary (triethanolamine, TEA) alkanolamines. The method was compared with known methods and found to be better in terms of accuracy.

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CO 2 is recognized as a major contributor of global warming. We report a facile, sensitive and accurate method for estimating CO 2 content in the alkanolamine solvents. It can be applied to a host of alkanolamine solvents as well as solvent mixtures for screening for prospective absorbent for CO 2 capture. In this method, pH of the CO 2 -loaded absorbent sample is measured and referred to a reference pH graph of corresponding amine with sulphuric acid that is constructed under specific conditions. The authenticity of the method was validated from known amounts of CO 2 added in the form of CO 2 -saturated water to three different types of alkanolamines i.e. the primary (monoethanolamine, MEA), secondary (diethanolamine, DEA) and tertiary (triethanolamine, TEA) alkanolamines. The method was compared with known methods and found to be better in terms of accuracy.

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Available abstract

CO 2 is recognized as a major contributor of global warming. We report a facile, sensitive and accurate method for estimating CO 2 content in the alkanolamine solvents. It can be applied to a host of alkanolamine solvents as well as solvent mixtures for screening for prospective absorbent for CO 2 capture. In this method, pH of the CO 2 -loaded absorbent sample is measured and referred to a reference pH graph of corresponding amine with sulphuric acid that is constructed under specific conditions. The authenticity of the method was validated from known amounts of CO 2 added in the form of CO 2 -saturated water to three different types of alkanolamines i.e. the primary (monoethanolamine, MEA), secondary (diethanolamine, DEA) and tertiary (triethanolamine, TEA) alkanolamines. The method was compared with known methods and found to be better in terms of accuracy.

Key concepts: Alkanolamine, Diethanolamine, Triethanolamine, Solvent, Amine gas treating, Chemistry, Chromatography, Organic chemistry

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