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Diffusion in compressed binary gaseous systems
Author(s) -
Berry V. J.,
Koeller R. C.
Publication year - 1960
Publication title -
aiche journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.958
H-Index - 167
eISSN - 1547-5905
pISSN - 0001-1541
DOI - 10.1002/aic.690060221
Subject(s) - methane , diffusion , thermodynamics , nitrogen , hydrogen , binary number , exponential function , gaseous diffusion , equation of state , volume (thermodynamics) , nitrogen gas , chemistry , materials science , physics , mathematics , organic chemistry , mathematical analysis , electrode , arithmetic
Apparatus is described for experimentally determining diffusion coefficients in dense‐gas systems to pressures of 15,000 lb./sq. in. abs. Tests were made with the hydrogen‐nitrogen and methane‐ethane systems at 104°, 139°, and 171°F. to 10,000 lb./sq. in. abs. and with the nitrogen‐methane and nitrogen‐ethane systems at 104°F. to 2,500 lb./sq. in. abs. In all cases it was found that diffusion coefficients predicted on the basis of the Lennard‐Jones model with Thorne's dense‐gas correction diverged below the experimental data in the high‐density region. Coefficients predicted from the Slattery‐Bird reduced‐state correlation showed better agreement with the experimental data. The temperature dependence of the results is better described by the exponential form for liquids than by the form of the dense‐gas theory.