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High pressure phase behaviour of {x1CF4+x2NaCl+(1−x1−x2)H2O)}

✍ Scribed by P.J. Smits; R.J.A. Smits; C.J. Peters; J. de Swaan Arons

Publisher
Elsevier Science
Year
1997
Tongue
English
Weight
201 KB
Volume
29
Category
Article
ISSN
0021-9614

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✦ Synopsis

Experimental results of the high pressure phase behaviour for 4x1CF4 + x2NaCl + (1 -x1 -x2)H2O5 are presented. (Gas + gas) equilibria for 10 compositions, with mole fractions of CF4 (0.0076 2 0.0002) Q x1 Q (0.0335 2 0.0002), and NaCl (0.0032 2 0.0002) Q x2 Q (0.0103 2 0.0002) were measured in a high-pressure autoclave with sapphire windows and magnetic stirring. Phase transitions were determined visually. The pressure range was from 20 MPa to 200 MPa and the temperature range from T = 585 K to T = 663 K. Isopleths for NaCl mass fractions v = (0.011, 0.021 and 0.033) relative to H2O are shifted towards higher temperatures compared with the binary mixture 4xCF4 + (1 -x)H2O5. The objective of this study was the investigation of the phase behaviour of a model-system encountered in supercritical water oxidation processes.

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