Pizarro Consuelo, Suárez-Iglesias Octavio, Medina Ignacio, Bueno Julio L
Departamento de Ingeniería Química y T.M.A., Universidad de Oviedo, 33071 Oviedo, Spain.
J Chromatogr A. 2007 Oct 12;1167(2):202-9. doi: 10.1016/j.chroma.2007.08.010. Epub 2007 Aug 9.
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.
采用泰勒-阿里斯色谱法，在15.0至35.0MPa压力以及313.16至333.16K温度范围内，测定了1,2-二乙苯、1,4-二乙苯、5-叔丁基间二甲苯和苯乙炔在超临界二氧化碳中无限稀释时的二元扩散系数。讨论了温度、压力、粘度和密度的影响。在研究温度依赖性时，在35.0MPa压力下，对5-叔丁基间二甲苯在308.16至398.16K温度范围内进行了额外测量。将四种溶质的测量扩散系数与通过几个预测公式计算得到的扩散系数进行了比较。
