ISSN:
0001-1541
Keywords:
Chemistry
;
Chemical Engineering
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
,
Process Engineering, Biotechnology, Nutrition Technology
Notes:
For the surface tension of organic compounds, σ = [ P·(ρl - ρv)]4 is proposed where P = P0·(1 - Tr)0.37·Tr·exp(0.30066/Tr + 0.86442·Tr9). ρl and ρv are molar densities of liquid and vapor, respectively, Tr = T/Tc, and P0 is a temperature-independent, compound-dependent constant similar to Sugden's parachor. This new expression, derived from statistical-mechanics, represents the experimental surface tension data of 94 different organic compounds within 1.05 AAD%. We also propose P0 = 39.6431· [0.22217 - 2.91042 × 10-3·(R*/Tbr2)·Tc13/12/Pc5/6] as a corresponding-states expression to correlate the temperature-independent parameter P0 for various compounds. Here, R* = Rm,ref, Rm is the molar refraction, Rm,ref is the molar refraction of the reference fluid (methane), and Tbr is the reduced normal boiling point. When this generalized expression is used, surface tensions for all 94 compounds can be predicted within 2.57 AAD% at all temperatures investigated.
Additional Material:
4 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/aic.690420523
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