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Response of a gas‐liquid interface to concentration pulses
Author(s) -
Whitaker Stephen,
Pigford R. L.
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.690120421
Subject(s) - sulfur dioxide , chemistry , sulfur , absorption (acoustics) , molecule , phase (matter) , hydrogen , analytical chemistry (journal) , inorganic chemistry , environmental chemistry , materials science , organic chemistry , composite material
Frequency response techniques have been applied to the study of the absorption of sulfur dioxide in water contaminated with surface‐active material. The response of a 0.004‐in. thick liquid film to a sinusoidally varying sulfur dioxide pressure was determined for frequencies ranging from 1 to 10 cycles/sec. The total quantity of sulfur dioxide dissolved was observed continuously by measuring the amount of light absorbed by the film, which contained a colored hydrogen ion indicator, cresol red. The experimental data indicate the presence of a surface phase of absorbed material through which sulfur dioxide molecules had to pass as they were transferred between gas and liquid. In addition to creating a resistance to the passage of the solute molecules, the surface phase apparently was capable of storing the molecules temporarily.