(71a) Physical Solvent Mixtures for CO2 Absorption at Simulated Pre-Combustion Conditions
AIChE Annual Meeting
Monday, November 14, 2016 - 8:00am to 8:21am
We have developed physical solvent mixtures for CO2 absorption at simulated pre-combustion conditions. In this study, the gas solubility and mass transfer coefficient of CO2, H2, CH4 in a physical solvent, an ionic liquid, and other mixtures were measured in a Continuous Stirred Tank Reactor (CSTR) by the step-pressure dynamic method. The solvent performance and their mass-transfer properties in a gas-liquid system are important for engineering design and unit operation. The absorption of CO2, and H2 in physical solvents and other mixture were investigated. Effects of pressure on the volumetric coefficient KLa were studied with various gas liquid systems in the pressure range 0-30 atm. Experiment data of the mass transfer coefficient of CO2 in physical solvents and mixtures matched predictions. Based on the experiment observation, physical properties and the kinetics of mixed solvents followed ideal solution mixing rules. Results of this study provided a base for further investigation on solvent mixture for gas absorption.