Thermal Diffusivity in Supercritical Fluids Measured by Thermal Lensing

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Thermal diffusivities of supercritical CO2 and C2H6 were determined over a wide density range with a photothermal technique. The thermal lens, formed by the degradation of the absorbed light energy as heat by the sample, allows the employment of a nonequilibrium method in the critical region. Contro...

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Autor principal: Wetzler, D.E
Otros Autores: Aramendía, P.F, Japas, M.L, Fernández-Prini, R.
Formato: Capítulo de libro
Lenguaje:Inglés
Publicado: Kluwer Academic/Plenum Publishers 1998
Acceso en línea:Registro en Scopus
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030 |a IJTHD 
100 1 |a Wetzler, D.E. 
245 1 0 |a Thermal Diffusivity in Supercritical Fluids Measured by Thermal Lensing 
260 |b Kluwer Academic/Plenum Publishers  |c 1998 
270 1 0 |m Japas, M.L.; Unidad de Actividad Química, Comn. Nac. de Ener. Atómica, Libertador 8250, 1429 Buenos Aires, Argentina 
506 |2 openaire  |e Política editorial 
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520 3 |a Thermal diffusivities of supercritical CO2 and C2H6 were determined over a wide density range with a photothermal technique. The thermal lens, formed by the degradation of the absorbed light energy as heat by the sample, allows the employment of a nonequilibrium method in the critical region. Controlling the refractive-index gradient, i.e., a density gradient, perturbations can be maintained at levels where convection is negligible. An easy-to-operate setup allowed us to measure thermal diffusivities in the density ranges 5 to 20 mol·dm-3 for CO2 at 308 and 313 K and 2 to 12mol·dm-3 for C2H6 at 308 K with a standard precision of 15%.  |l eng 
593 |a Depto. Quim. Inorg. Analitica y Q., Universidad de Buenos Aires, Ciudad Universitaria, 1428 Buenos Aires, Argentina 
593 |a Unidad de Actividad Química, Comn. Nac. de Ener. Atómica, Libertador 8250, 1429 Buenos Aires, Argentina 
690 1 0 |a CARBON DIOXIDE 
690 1 0 |a ETHANE 
690 1 0 |a PHOTOTHERMAL 
690 1 0 |a SUPERCRITICAL FLUID 
690 1 0 |a THERMAL DIFFUSIVITY 
690 1 0 |a THERMAL LENS 
690 1 0 |a CARBON DIOXIDE 
690 1 0 |a DENSITY (OPTICAL) 
690 1 0 |a ETHANE 
690 1 0 |a LIGHT EXTINCTION 
690 1 0 |a MEASUREMENT ERRORS 
690 1 0 |a PERTURBATION TECHNIQUES 
690 1 0 |a REFRACTIVE INDEX 
690 1 0 |a THERMAL VARIABLES MEASUREMENT 
690 1 0 |a SUPERCRITICAL CARBON DIOXIDE 
690 1 0 |a SUPERCRITICAL ETHANE 
690 1 0 |a THERMAL LENSING 
690 1 0 |a THERMAL DIFFUSION IN LIQUIDS 
700 1 |a Aramendía, P.F. 
700 1 |a Japas, M.L. 
700 1 |a Fernández-Prini, R. 
773 0 |d Kluwer Academic/Plenum Publishers, 1998  |g v. 19  |h pp. 27-42  |k n. 1  |p Int J Thermophys  |x 0195928X  |t International Journal of Thermophysics 
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856 4 0 |u https://doi.org/10.1023/A:1021442901002  |y DOI 
856 4 0 |u https://hdl.handle.net/20.500.12110/paper_0195928X_v19_n1_p27_Wetzler  |y Handle 
856 4 0 |u https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_0195928X_v19_n1_p27_Wetzler  |y Registro en la Biblioteca Digital 
961 |a paper_0195928X_v19_n1_p27_Wetzler  |b paper  |c PE 
962 |a info:eu-repo/semantics/article  |a info:ar-repo/semantics/artículo  |b info:eu-repo/semantics/publishedVersion 
999 |c 80851 

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