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Desorption delay in gas/liquid systems during vessel top venting
Author(s) -
Friedel Lutz
Publication year - 1987
Publication title -
chemical engineering and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.403
H-Index - 81
eISSN - 1521-4125
pISSN - 0930-7516
DOI - 10.1002/ceat.270100126
Subject(s) - refrigerant , dimensionless quantity , desorption , aqueous solution , chemistry , thermodynamics , boiling , mass transfer , boiling point , mechanics , solubility , analytical chemistry (journal) , heat exchanger , chromatography , adsorption , organic chemistry , physics
During the sudden unheated vessel top venting of initially saturated two‐component gas/liquid mixtures, in which the gas is also extensively dissolved in the non‐evaporating liquid phase, a solubility inequilibrium develops between the phases; re‐equilibration can set in only after a so‐called desorption delay time. Laboratory measurements of this delay time were under‐taken with model mixtures of CO 2 and water and viscous aqueous (Newtonian) solutions by high speed cinematography. The parameters of the experiments are relief cross‐section, initial liquid level, pressure, temperature, and concentration. The shortest deley time obtained lasts approximately 75 ms. It differs substantially from the minimum boiling delay time previously measured with various refrigerants in the same test facility. The experimental results are correlated by a semi‐empirical dimensionless power relationship, which includes all independent primary design variables generally availble in a physically consistent interrelationship. Reasonable extrapolations to other test conditions and aqueous two‐component systems with an acceptable accuracy systems can therefore be expected.