Knowledge of the density and viscosity of solvents is required for engineering design of equipment involving solvents. In addition, there is interest in using volumetric data for calculation of the effects of pressure and temperature on thermodynamic properties. Excess thermodynamic properties are of great importance to our understanding of the nature and extent of molecular aggregation resulting from intermolecular interactions. Mixtures of water and organic solvents often show strong deviations from ideality as regards to density, viscosity, and refractive index. Water has a great ability to support extensive hydrogen-bonding networks.
In this study, the density, viscosity, and refractive index are measured using a DMA 4500 vibrating tube digital viscometer, Ubbeholde viscometers (0, 0c, 1, 10, 11, 23, and 30), and a Leica Mark II plus refractometer. The main objective is to measure the viscosity, density, and refractive index for the aqueous physical solvents, aqueous amines, mixed solvents, and aqueous amine blends. The derived excess volumes, partial molar volumes at infinite dilution, viscosity deviations, and Nissan-Grunberg interaction energy constants are used to have a better "picture" of the solute-water interactions. In some cases, complex formation can occur. The final aim is to be able to use these properties to help in screening the physical solvents for their capacity for CO2 absorption.
Research Consortium of International Test Centre for CO2 Capture Sponsored By:
SaskPower, EnCana, HTC Purenergy, E.ON|UK, Saudi Aramco, Research Institute of Innovative Technology for the Earth (RITE), Alberta Energy Research Institute (AERI), RWEnpower, Babcock & Wilcox, Natural Resources Canada, and Saskatchewan Energy & Resources
Other support also provided by:
Canada Foundation for Innovation (CFI), Natural Sciences and Engineering Research Council of Canada, Western Economic Diversification Canada, Government of Saskatchewan, Alberta Research Council, Natural Resources Canada, University of Waterloo, and University of Regina.