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 |
isbn |
1872-8162 |
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
|