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
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