Bulletin of the Society of Sea Water Science, Japan
Online ISSN : 2185-9213
Print ISSN : 0369-4550
ISSN-L : 0369-4550
On Pressure and Temperature Diagrams of Mixed Hydrating Agents
Concentration of Sea Water and Brine by the Gas Hydrate Process (14)
Susumu SAITO
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1968 Volume 22 Issue 2 Pages 192-198

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Abstract
For the purpose of transferring hydrating lines, the author conducted a series of experiments on mixed hydrating agents, especially with respect to the equilibrium condition of hydrate formation. The results obtained were as follows:
1. In the mixed hydrating agent systems such as R-12 with R-21 or R-21 with R-22, both the hydrating lines and the condensation lines lay between those of component hydrating agents of mixed system. Even in an unstable area, one hydrating agent was packed into cages formed by the other agent, and thus the former contributed to the stability of the latter lattice.
2. In azeotropic mixture, hydrate was formed athigher pressure than those of component gas hydrates. Mixed ratio, at which the highest pressure was shown, agreed with the ratio of azeotropic mixture.
3. When help gases were added to R-12, they were packed into smaller cages of structure II, showing their stabilizing effect to it. The effect varied with temperature, causing curvature on the hydrating lines.
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