Infinite Dilution Activity Coefficients of Acetone in Water. A New Experimental Method and Verification

Autor:	Roger P. Hartwick, Colin S. Howat
Rok vydání:	1995
Předmět:	Activity coefficient chemistry.chemical_compound Tray Chemistry Phase equilibrium General Chemical Engineering Scientific method Acetone Thermodynamics General Chemistry Dilution
Zdroj:	Journal of Chemical & Engineering Data. 40:738-745
ISSN:	1520-5134 0021-9568
DOI:	10.1021/je00020a004
Popis:	The requirements for the removal of volatile organic compounds in processes are becoming more stringent. Process designs to accomplish the removal of volatile organic compounds require knowledge of the infinite dilution behavior in water. This can be estimated by extrapolating finite phase equilibrium data into the infinite dilution region. However, this is solution model dependent; i.e., different models describing the same acetone + water data predict γ∞ which differ by a factor of 3. The consequence is predicted tray requirements up to 3 times different for the same separation. More reliable infinite dilution activity coefficients based on experimental data are required for reliable process design. One method is to estimate the slope (dP/dx) x=0 by measuring (dP/dx) x>0 at low compositions and extrapolating to infinite dilution. Ebulliometric methods are subject to temperature gradients and pressure fluctuations. Conventional static methods suffer from the presence of noncondensable chemicals.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::9d88a02cd0015895bc4f250d637b30df https://doi.org/10.1021/je00020a004 Zobrazit plný text záznamu