Effect of carbon dioxide loading on the solubility of nitrous oxide in aqueous solutions of 2-(tert-butylamino)ethanol

The physical solubility of nitrous oxide was measured in aqueous solutions of 2-(tert-butylamino)ethanol. This amine is considered to be sterically hi ndered and is a candidate chemical absorbent for the selective absorption o f hydrogen sulfide in the presence of carbon dioxide. Measurements were mad e for amine concentrations up to 30 mass % over the temperature range 25 de greesC to 40 degreesC. The effect of carbon dioxide loading up to 0.90 mol of CO2/mole of amine on the nitrous oxide solubility was also investigated. The data obtained in this work may be used to estimate the physical solubi lity of carbon dioxide in these amine solutions through use of the nitrous oxide analogy method.