January 2010

Special Report: Gas Processing Developments

Equilibrium considerations in choosing a gas treating amine

Pursue these guidelines to understand solubility

Bedell, S. A., The Dow Chemical Company

Solvents have been used for decades to remove acid gases from a variety of gas streams.1,2 The simplest type of solvent is referred to as a physical solvent, usually a pure organic compound that dissolves acid gases through nonreactive interactions. The more commonly used solvent systems are aqueous amine solutions that are called chemical solvents. In addition to processing a certain degree of physical solubility, chemical solvents (amines, in particular) can also react to form thermally regenerable salts with acid gases. Alkylamines are the simplest type of amine. An alkanolamine is a particular type of amine that contains hydroxyethyl or hydroxypropyl groups in place of some or all alky

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