Thermal Diffusivity in Supercritical Fluids Measured by Thermal Lensing
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...
Guardado en:
| Autores principales: | , , , |
|---|---|
| Formato: | JOUR |
| Materias: | |
| Acceso en línea: | http://hdl.handle.net/20.500.12110/paper_0195928X_v19_n1_p27_Wetzler |
| Aporte de: |
| id |
todo:paper_0195928X_v19_n1_p27_Wetzler |
|---|---|
| record_format |
dspace |
| spelling |
todo:paper_0195928X_v19_n1_p27_Wetzler2023-10-03T15:09:40Z Thermal Diffusivity in Supercritical Fluids Measured by Thermal Lensing Wetzler, D.E. Aramendía, P.F. Japas, M.L. Fernández-Prini, R. Carbon dioxide Ethane Photothermal Supercritical fluid Thermal diffusivity Thermal lens Carbon dioxide Density (optical) Ethane Light extinction Measurement errors Perturbation techniques Refractive index Thermal variables measurement Supercritical carbon dioxide Supercritical ethane Thermal lensing Thermal diffusion in liquids 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%. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_0195928X_v19_n1_p27_Wetzler |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
Carbon dioxide Ethane Photothermal Supercritical fluid Thermal diffusivity Thermal lens Carbon dioxide Density (optical) Ethane Light extinction Measurement errors Perturbation techniques Refractive index Thermal variables measurement Supercritical carbon dioxide Supercritical ethane Thermal lensing Thermal diffusion in liquids |
| spellingShingle |
Carbon dioxide Ethane Photothermal Supercritical fluid Thermal diffusivity Thermal lens Carbon dioxide Density (optical) Ethane Light extinction Measurement errors Perturbation techniques Refractive index Thermal variables measurement Supercritical carbon dioxide Supercritical ethane Thermal lensing Thermal diffusion in liquids Wetzler, D.E. Aramendía, P.F. Japas, M.L. Fernández-Prini, R. Thermal Diffusivity in Supercritical Fluids Measured by Thermal Lensing |
| topic_facet |
Carbon dioxide Ethane Photothermal Supercritical fluid Thermal diffusivity Thermal lens Carbon dioxide Density (optical) Ethane Light extinction Measurement errors Perturbation techniques Refractive index Thermal variables measurement Supercritical carbon dioxide Supercritical ethane Thermal lensing Thermal diffusion in liquids |
| description |
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%. |
| format |
JOUR |
| author |
Wetzler, D.E. Aramendía, P.F. Japas, M.L. Fernández-Prini, R. |
| author_facet |
Wetzler, D.E. Aramendía, P.F. Japas, M.L. Fernández-Prini, R. |
| author_sort |
Wetzler, D.E. |
| title |
Thermal Diffusivity in Supercritical Fluids Measured by Thermal Lensing |
| title_short |
Thermal Diffusivity in Supercritical Fluids Measured by Thermal Lensing |
| title_full |
Thermal Diffusivity in Supercritical Fluids Measured by Thermal Lensing |
| title_fullStr |
Thermal Diffusivity in Supercritical Fluids Measured by Thermal Lensing |
| title_full_unstemmed |
Thermal Diffusivity in Supercritical Fluids Measured by Thermal Lensing |
| title_sort |
thermal diffusivity in supercritical fluids measured by thermal lensing |
| url |
http://hdl.handle.net/20.500.12110/paper_0195928X_v19_n1_p27_Wetzler |
| work_keys_str_mv |
AT wetzlerde thermaldiffusivityinsupercriticalfluidsmeasuredbythermallensing AT aramendiapf thermaldiffusivityinsupercriticalfluidsmeasuredbythermallensing AT japasml thermaldiffusivityinsupercriticalfluidsmeasuredbythermallensing AT fernandezprinir thermaldiffusivityinsupercriticalfluidsmeasuredbythermallensing |
| _version_ |
1807319652050665472 |