Phase equilibria and volumetric properties of the systems KCl-H[sub 2]O and NaCl-KCl-H[sub 2]O above 573 K: Equation of state representation

Journal Article · Fri Oct 01 00:00:00 EDT 1993 · Geochimica et Cosmochimica Acta; (United States)

DOI:https://doi.org/10.1016/0016-7037(93)90127-I· OSTI ID:5302614

Anderko, A; Pitzer, K S ^[1]

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1. Lawrence Berkeley Lab., CA (United States)

A comprehensive equation of state has been developed for the system KCl-H[sub 2]O at high temperatures and pressures. The equation is based on a theoretical model developed earlier for the system NaCl-H[sub 2]O. Experimental vapor-liquid equilibrium, solid-liquid equilibrium, and density data have been critically evaluated and used to fit the adjustable parameters of the model. The equation of state reproduces these properties within experimental uncertainty. It is valid for temperatures between 573 K and 973 K and pressures up to 5 kbar. Graphs are presented to provide recommended values of phase compositions and volumetric properties. Furthermore, the equations for NaCl-H[sub 2]O and KCl-H[sub 2]O have been combined to yield an equation for the ternary system NaCl-KCl-H[sub 2]O. The equation reproduces solid-liquid equilibrium data for the ternary system and agrees with the available semiquantitative information about the relative concentration of Na and K in the vapor phase.

• DOE Contract Number: AC03-76SF00098
• OSTI ID: 5302614
• Journal Information: Geochimica et Cosmochimica Acta; (United States), Vol. 57:20; ISSN 0016-7037
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
58 GEOSCIENCES
BRINES
EQUATIONS OF STATE
POTASSIUM CHLORIDES
SODIUM CHLORIDES
MATHEMATICAL MODELS
TEMPERATURE RANGE 0400-1000 K
ALKALI METAL COMPOUNDS
CHLORIDES
CHLORINE COMPOUNDS
EQUATIONS
HALIDES
HALOGEN COMPOUNDS
POTASSIUM COMPOUNDS
SODIUM COMPOUNDS
TEMPERATURE RANGE
400201* - Chemical & Physicochemical Properties
580000 - Geosciences