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Densimetry for the Quantification of Sorption Phenomena on Nonporous Media Near the Dew Point of Fluid Mixtures

Published

Author(s)

Mark O. McLinden, Markus Richter

Abstract

Phase equilibria of fluid mixtures are important in numerous industrial applications and are, thus, a major focus of thermophysical property research. Improved data, particularly along the dew line, are needed to improve model predictions. Here we present experimental results utilizing highly accurate densimetry to quantify the effects of sorption and capillary condensation, which exert a distorting influence on measured properties near the dew line. We investigated the (pressure, density, temperature, composition) behaviour of binary (CH4 + C3H8) and (Ar + CO2) mixtures in the temperature range from (248.15 to 298.15) K starting at low pressures and increasing pressure towards the dew point along isotherms. Three distinct regions were observed: (1) Minor sorption effects at low pressures. (2) Condensation in pores/capillaries within approximately 98 % of the dew-point pressure. (3) Bulk condensation. We postulate that the intersection of the third region with the extrapolation of the first region best approximates the true dew point.
Citation
Scientific Reports

Keywords

densimetry, equilibrium, sorption

Citation

McLinden, M. and Richter, M. (2017), Densimetry for the Quantification of Sorption Phenomena on Nonporous Media Near the Dew Point of Fluid Mixtures, Scientific Reports, [online], https://doi.org/10.1038/s41598-017-06228-6 (Accessed February 22, 2024)
Created July 20, 2017, Updated July 8, 2020