DOI: 10.1002/aic.690321214. Diffusion and mass transfer in supercritical fluids

Diffusion and mass transfer in supercritical fluids

10.1002/aic.690321214

Crossref journal-article

Wiley

AIChE Journal (311)

Abstract

AbstractThe different behavior of fluid density and viscosity in going from the dilute gas to the dense fluid state gives rise to kinematic viscosities which, in the near supercritical region, are lower than for liquid metals. As a consequence, the relative importance of natural convection (as measured by the ratio of buyoant to inertial forces) is two orders of magnitude higher in a supercritical fluid (at constant Reynolds number) than in normal liquids.Binary diffusion coefficients of nonvolatile solutes in supercritical fluids were measured with a technique that involved laminar flow and diffusion in a rectangular channel. The solution to this hydrodynamic problem is presented. By varying the inclination of the solute source plane with respect to the horizontal position, apparent diffusion coefficients were measured that were up to six times higher than the “true” coefficients.Experimental binary diffusion coefficients, including published literature data, were analyzed in the light of hydrodynamic (Stokes‐Einstein) theory. The analysis suggests that under the high‐density, low‐viscosity conditions that characterize supercritical fluids, hydrodynamic behavior at the molecular level is approached, and can be used as a basis for data extrapolation.

Bibliography

Debenedetti, P. G., & Reid, R. C. (1986). Diffusion and mass transfer in supercritical fluids. AIChE Journal, 32(12), 2034â2046. Portico.

Authors 2

P. G. Debenedetti (first)
R. C. Reid (additional)

References 30 Referenced 133

10.1016/0371-1951(66)80110-8
10.1038/125309b0
{'key': 'e_1_2_1_4_1', 'volume-title': 'Carbon Dioxide—International Thermodynamic Tables of the Fluid State', 'author': 'Angus S.', 'year': '1976'} / Carbon Dioxide—International Thermodynamic Tables of the Fluid State by Angus S. (1976)
10.1063/1.430647
{'key': 'e_1_2_1_6_1', 'volume-title': 'The Mathematical Theory of Nonuniform Gases', 'author': 'Chapman S.', 'year': '1970'} / The Mathematical Theory of Nonuniform Gases by Chapman S. (1970)
10.1016/0009-2509(83)80125-0
Debenedetti P. G. “Diffusion and Mass Transfer in Supercritical Fluids ” Ph.D. Thesis Massachusetts Inst. Tech. (1984).
10.1063/1.1681175
{'key': 'e_1_2_1_10_1', 'volume-title': 'Analysis of Heat and Mass Transfer', 'author': 'Eckert E. R. G.', 'year': '1972'} / Analysis of Heat and Mass Transfer by Eckert E. R. G. (1972)
10.1080/01496398208058150
10.1063/1.437618
10.1016/0009-2509(71)86007-4
10.1246/bcsj.38.1144
{'issue': '4', 'key': 'e_1_2_1_15_1', 'first-page': '485', 'article-title': 'Diffusion of Naphthalene in Compressed Ethylene and Carbon Dioxide', 'volume': '38', 'author': 'Iomtev M. B.', 'year': '1964', 'journal-title': 'Russ. J. Phys. Chem.'} / Russ. J. Phys. Chem. / Diffusion of Naphthalene in Compressed Ethylene and Carbon Dioxide by Iomtev M. B. (1964)
10.1002/aic.690080116
10.1016/0009-2509(71)86048-7
Kurnik R. T. “Supercritical Extraction: A Study of Binary and Multicomponent Solid‐Fluid Equilibria ” Sc.D. Thesis Massachusetts Inst. Tech. (1981).
10.1021/je00023a016
10.1002/aic.690270528
10.1002/cjce.5450460519
10.1115/1.3687128
{'issue': '2', 'key': 'e_1_2_1_23_1', 'first-page': '179', 'article-title': 'Supercritical Fluid Extraction', 'volume': '1', 'author': 'Paulaitis M. E.', 'year': '1983', 'journal-title': 'Rev. in Chem. Eng.'} / Rev. in Chem. Eng. / Supercritical Fluid Extraction by Paulaitis M. E. (1983)
10.1021/i160057a011
10.1021/i160021a012
{'key': 'e_1_2_1_26_1', 'volume-title': 'The Properties of Gases and Liquids', 'author': 'Reid R. C.', 'year': '1977'} / The Properties of Gases and Liquids by Reid R. C. (1977)
{'issue': '9', 'key': 'e_1_2_1_27_1', 'first-page': '2007', 'article-title': 'Liquid Diffusivities', 'volume': '46', 'author': 'Scheibel E. G.', 'year': '1954', 'journal-title': 'Ind. Eng. Chem.'} / Ind. Eng. Chem. / Liquid Diffusivities by Scheibel E. G. (1954)
10.1021/je00044a021
{'key': 'e_1_2_1_29_1', 'volume-title': 'Laminar Flow Forced Convection in Ducts', 'author': 'Shah R. K.', 'year': '1978'} / Laminar Flow Forced Convection in Ducts by Shah R. K. (1978)
10.1002/bbpc.19790831003
10.1002/aic.690010222

Dates

Type	When
Created	21 years, 2 months ago (June 23, 2004, 5:52 a.m.)
Deposited	1 year, 10 months ago (Oct. 20, 2023, 10:14 a.m.)
Indexed	4 weeks, 1 day ago (Aug. 2, 2025, 12:44 a.m.)
Issued	38 years, 8 months ago (Dec. 1, 1986)
Published	38 years, 8 months ago (Dec. 1, 1986)
Published Online	21 years, 2 months ago (June 17, 2004)
Published Print	38 years, 8 months ago (Dec. 1, 1986)

Funders 0

None

BibTeX

@article{Debenedetti_1986, title={Diffusion and mass transfer in supercritical fluids}, volume={32}, ISSN={1547-5905}, url={http://dx.doi.org/10.1002/aic.690321214}, DOI={10.1002/aic.690321214}, number={12}, journal={AIChE Journal}, publisher={Wiley}, author={Debenedetti, P. G. and Reid, R. C.}, year={1986}, month=dec, pages={2034–2046} }

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