Diffusivities of metal acetylacetonates in liquid ethanol and comparison with the transport behavior in supercritical systems
authors Zezere, B; Cordeiro, J; Leite, J; Magalhaes, AL; Portugal, I; Silva, CM
nationality International
journal JOURNAL OF SUPERCRITICAL FLUIDS
author keywords Chromatographic peak broadening method; Diffusion coefficient; Ethanol; Metal acetylacetonate; Modeling
keywords BINARY DIFFUSION-COEFFICIENTS; CARBON-DIOXIDE; INFINITE-DILUTION; TRACER DIFFUSIVITIES; PRESSURE RANGE; III ACETYLACETONATE; ALPHA-PINENE; CO2; FLUIDS; MODEL
abstract Diffusion coefficients of chromium(III) acetylacetonate, palladium(II) acetylacetonate, nickel(II) acetylacetonate, vanadyl(II) acetylacetonate, and titanium(IV) oxyacetylacetonate in liquid ethanol were measured by chromatographic peak broadening method (CPB) over the range of temperature 303.15-333.15 K at atmospheric pressure. The dependencies of D-12 upon temperature and Stokes-Einstein coordinates were examined in detail. Moreover, the experimental data were modeled using nine equations from the literature to test their accuracy and prediction ability. The lower deviations were achieved by the 2-parameter correlation of Dymond-Hildebrand-Batschinski (0.32-2.17 %), the 1-parameter correlation of Tracer Liu-Silva-Macedo (1.58-3.88 %), and the 2-parameter correlations of Magalhaes et at (0.55-2.32 %). Finally, the proposed correlation based on hydrodynamic approach was found to well represent palladium(II) acetylacetonate and chromium(Ill) acetylacetonate systems in super-critical carbon dioxide and liquid ethanol, with the average absolute relative deviation of 3.15 and 5.02 %, respectively.
publisher ELSEVIER SCIENCE BV
issn 0896-8446
year published 2019
volume 143
beginning page 259
ending page 267
digital object identifier (doi) 10.1016/j.supflu.2018.06.003
web of science category Chemistry, Physical; Engineering, Chemical
subject category Chemistry; Engineering
unique article identifier WOS:000450378000031
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