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Modelling solubility of solids in supercritical fluids using response surface methodology

✍ Scribed by Julián García; Francisco Rodríguez; Juan A Revenga

Publisher
Wiley (John Wiley & Sons)
Year
2000
Tongue
English
Weight
145 KB
Volume
75
Category
Article
ISSN
0268-2575

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✦ Synopsis

A Response Surface Methodology approach to correlate the solubility data of solids in supercritical ¯uids directly to the pressure and temperature is described. Published data for 2,6dimethylnaphthalene, 2,3-dimethylnaphthalene, phenanthrene and benzoic acid in both supercritical carbon dioxide and supercritical ethylene were correlated by means of quadratic models, with R 2 statistics greater than 0.99 at more than a 99.9% con®dence level. With the developed quadratic models, the solubility for the above-mentioned solids in both supercritical ¯uids was predicted with average absolute percentage errors less than 5%. So, this approach to estimate solubility provides a possible guide for saving experimental effort and then giving simple models that could be used for industrial design purposes.

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## Abstract Different in situ spectroscopic techniques, including infrared, ultraviolet, and fluorescence, were developed to measure the solubility of organic solids in supercritical carbon dioxide (scCO~2~). These techniques are applicable over a wide range of concentrations, as low as 10^−6^ or 1