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Diffusion of gases in electrolytic solutions
Author(s) -
Gubbins Keith E.,
Bhatia Kamlesh K.,
Walker Robert D.
Publication year - 1966
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.690120328
Subject(s) - electrolyte , diffusion , ion , chemistry , activation energy , thermodynamics , ionic bonding , hydrogen , atmospheric temperature range , strong electrolyte , analytical chemistry (journal) , aqueous solution , effective diffusion coefficient , range (aeronautics) , inorganic chemistry , materials science , chromatography , organic chemistry , medicine , physics , composite material , electrode , radiology , magnetic resonance imaging
Measurements of the diffusion coefficients of hydrogen and methane in strong aqueous electrolytes have been made with the use of the diaphragm cell method. The variation of the diffusion coefficients with electrolyte concentration, type of ion, and temperature has been studied over the electrolyte concentration range zero to saturated, and for temperatures in the range 25° to 65°C. The results have been interpreted with the Eyring rate theory. The presence of ions in water increases the activation energy for diffusion which results in a decrease in the diffusion coefficient. The increase in activation energy is represented by terms that are additive for the ions involved. The influence of ions on the diffusion coefficient increases rapidly with ionic charge, but seems to be little affected by temperature or solute for the systems studied.