title: Using supercritical fluid chromatography to determine diffusion coefficients of 1,2-diethylbenzene, 1,4-diethylbenzene, 5-tert-butyl-m-xylene and phenylacetylene in supercritical carbon dioxide.
abstract: 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 333.16K 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 398.16K at 35.0 MPa. The measured diffusivities of the four solutes were compared with the calculated ones by several predictive formulas.
authors.affiliation: Departamento de Ingeniería Química y T.M.A., Universidad de Oviedo, 33071 Oviedo, Spain.
authors.forename: Consuelo
authors.initials: C
authors.lastname: Pizarro
authors.forename: Octavio
authors.initials: O
authors.lastname: Suárez-Iglesias
authors.forename: Ignacio
authors.initials: I
authors.lastname: Medina
authors.forename: Julio L
authors.initials: JL
authors.lastname: Bueno
mesh_terms: D000114:Acetylene / Q000031:analogs & derivatives* / Q000737:chemistry; D000465:Algorithms; D001555:Benzene Derivatives / Q000737:chemistry*; D002245:Carbon Dioxide / Q000737:chemistry*; D025924:Chromatography, Supercritical Fluid / Q000295:instrumentation / Q000379:methods*; D004058:Diffusion; D008956:Models, Chemical; D014992:Xylenes / Q000737:chemistry*
chemical_list: D001555:Benzene Derivatives; D014992:Xylenes; C064751:1,4-diethylbenzene; D002245:Carbon Dioxide; C044736:phenylacetylene; C064750:1,2-diethylbenzene; D000114:Acetylene