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Vapor pressure and heat of solution of sulfur dioxide in 1‐methyl‐2‐pyrrolidone and its aqueous solution
Author(s) -
Walker Richard J.,
Schwartz Cecil H.,
Wildman David J.
Publication year - 1984
Publication title -
the canadian journal of chemical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.404
H-Index - 67
eISSN - 1939-019X
pISSN - 0008-4034
DOI - 10.1002/cjce.5450620121
Subject(s) - aqueous solution , chemistry , sulfur dioxide , exothermic reaction , vapor pressure , vapour pressure of water , sulfur , water vapor , thermodynamics , analytical chemistry (journal) , inorganic chemistry , organic chemistry , physics
A new method was developed to measure the vapor pressure of sulfur dioxide above various liquid absorbents. It was applied to pure 1‐methyl‐2‐pyrrolidone and its aqueous solution at 50°C to 91°C for SO 2 loadings of 3.73 × 10 4 kg/kg to 2.16 × 10 −2 kg/kg. A chemical model was developed. The heat of solution was calculated from the dependence of the vapor pressure on temperature and was 3.98 × 10 7 J/kmol (exothermic) for pure 1‐methyl‐2‐pyrrolidone. The vapor pressures disagreed with the only previously published set of results but were confirmed by independent measurements with a gas chromatograph.
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