469126 Physical Solvent Mixtures for CO2 Absorption at Simulated Pre-Combustion Conditions

Monday, November 14, 2016: 8:00 AM
Van Ness (Hilton San Francisco Union Square)
Fan Shi1,2, Jeffrey Culp1,2, Nicholas Siefert1 and David Hopkinson3, (1)National Energy Technology Laboratory, Pittsburgh, PA, (2)AECOM, South Park, PA, (3)National Energy Technology Laboratory, Morgantown, WV

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.

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