ISSN:
1572-8927
Schlagwort(e):
Diaphragm cell
;
mutual diffusion coefficient
;
binary nonelectrolyte mixtures
;
ethylbenzene + n-hexane
;
carbon tetrachloride + ethylbenzene
;
cyclohexane + p-xylene
;
1,2-dichloroethane + cyclohexane
;
free-volume theory
Quelle:
Springer Online Journal Archives 1860-2000
Thema:
Chemie und Pharmazie
Notizen:
Abstract A diaphragm cell has been used to measure mutual diffusion coefficients at 25°C for four binary nonelectrolyte mixtures: ethylbenzene + n-hexane, carbon tetrachloride + ethylbenzene, cyclohexane + p-xylene, and 1,2-dichloroethane + cyclohexane. A free-volume predictive approach for binary mutual diffusion coefficients was developed and tested. Only infinite dilution diffusion coefficients, some readily available pure substance data, and UNIFAC group contribution parameters are used in the model. No binary equilibrium thermodynamic information is required. For 73 binary systems with an overall average absolute deviation of 5.2%, it has been shown that the developed method is better than two commonly available reference methods for the prediction of liquid diffusion coefficients.
Materialart:
Digitale Medien
URL:
http://dx.doi.org/10.1023/A:1022692303133
