ISSN:
0001-1541
Keywords:
Chemistry
;
Chemical Engineering
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
,
Process Engineering, Biotechnology, Nutrition Technology
Notes:
Calculations of the ionization constant of H2O are presented for densities ranging from those of subcritical water to those of supercritical steam. A recently-proposed semicontinuum model is used to calculate the standard-state hydration properties for the ions, H3O+, and OH- (Tanger and Pitzer, 1989). Calculated ionization constants are in good agreement with reported measurements at pressures from vapor-liquid saturation to 500 MPa and temperatures from 273 to 1,073 K. These measurements cover H2O densities ranging from ∼ 1,000 to 450 kg · m-3. At H2O densities less than 400 kg · m-3, our calculated ionization constants should be more reliable than those obtained from the commonly-used equation of Marshall and Franck (1981).
Additional Material:
7 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/aic.690351007
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