Abstract
As part of his experiments on hydrate crystallization, the author conducted a study on indirect contact systems in which the heat of formation was removed through metallic surface, and obtained the following results:
1. Except propane, every hydrate tested grew easily, but the growth rate was affected by species of hydrating agents. The order of these growth rates was R-21>R-22> R-12> propane, consisting with the order of solubilities of hydrating agents in water. Effect by temperature was not remarkable.
2. Basing upon the temperatures and pressures previously reported in connection with hydrate formation and the growth rate obtained from the present experiment, the author selected R-21 as the most profitable hydrating agent.
3. The velocity of hydrate growth was expressed by the first order function of hydrating agent concentration in liquid phase. The velocity constant is greatly affected by stirring strength.
4. Metastable area of the growth was between epuilibrium line and about 100 mmHg above the line.
