Using supercritical fluid chromatography to determine diffusion coefficients of 1,2-diethylbenzene, 1,4-DIETHYLBENZENE (cas 105-05-5), 5-tert-butyl-m-xylene and phenylacetylene in supercritical carbon dioxide

Add time:08/13/2019    Source:sciencedirect.com

The binary diffusion of 1,2-diethylbenzene, 1,4-diethylbenzene, 5-tert-butyl-m-xylene and phenylacetylene at infinite dilution in supercritical carbon dioxide were measured between 15.0 and 35.0 MPa and in the temperature range of 313.16 to 333.16 K by the Taylor–Aris chromatographic method. The effect of temperature, pressure, viscosity and density was discussed. In the case of temperature dependence, additional measurements were done for 5-tert-butyl-m-xylene from 308.16 to 398.16 K at 35.0 MPa. The measured diffusivities of the four solutes were compared with the calculated ones by several predictive formulas.

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