Solubility of carbon dioxide in mixtures of 2-amino-2-methyl-1-propanol and organic solvents

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Abstract

Sterically hindered amines, such as 2-amino-2-methyl-1-propanol (AMP), are an interesting alternative to the amines used in conventional CO2 absorption processes in industrial applications. One reason for this is because the carbamate formed is not stable, which may be beneficial during the regeneration of the amine solution in terms of a reduced energy requirement.

This paper presents experimental data on the solubility of CO2 in solutions of AMP in one of two organic solvents: N-methyl-2-pyrrolidone or triethylene glycol dimethyl ether, at different amine concentrations (15 wt% and 25 wt%) and temperatures (25 °C and 50 °C). A solid precipitate was observed during some of the experiments. The absorption capacity of the solution increased with AMP concentration and was higher at lower temperatures.

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Subject classification (UKÄ) – MANDATORY

  • Chemical Engineering

Keywords

  • CO2, Solubility, AMP, NMP, TEGDME, Precipitation
Original languageEnglish
Pages (from-to)247-254
JournalInternational Journal of Greenhouse Gas Control
Volume27
Publication statusPublished - 2014
Publication categoryResearch
Peer-reviewedYes