102570 Measuring Gas-Fluid Interfacial Area in Porous Media with the Chemical Reaction Method.
Poster Number 472-208
See more from this Division: SSSA Division: Soils and Environmental Quality
See more from this Session: Physical, Chemical, and Biological Processes Controlling Transport and Remediation of Emerging Contaminants in Soils Poster (includes student competition)
Abstract:
Ying Lyu 1,2, Jon Mainhagu 2 Mark L. Brusseau 2*,
1Institute of Water Resources and Environmental, Jilin University, Changchun 130026, P.R. China.
2.Department of Soil, Water and Environmental Science, School of Earth and Environmental Sciences, University of Arizona, 429 Shantz Building #38, P.O. Box 210038, Tucson, AZ, USA.
Interfacial partitioning tracer tests and pore-scale imaging methods are the two current means by which to measure fluid-fluid interfacial area in porous media. A chemical-reaction based method used in Chemical Engineering to quantify fluid-fluid interface in reactor systems is adapted herein for application to porous-media systems. The method is based on carbon dioxide absorption from the gas phase and subsequent reaction with NaOH in aqueous solution. Concentration profiles of the reactants are monitored during injection into a column packed with the selected porous medium. The data are used to determine reaction parameters such as absorption rate and effective gas-liquid interfacial area. Effects of media grain size, reaction conditions, and liquid and gas volumetric flow rates on the effective interfacial area were investigated. The measured interfacial areas are compared to values obtained from partitioning tracer tests and microtomographic imaging.
See more from this Division: SSSA Division: Soils and Environmental Quality
See more from this Session: Physical, Chemical, and Biological Processes Controlling Transport and Remediation of Emerging Contaminants in Soils Poster (includes student competition)