Span 60 on Characteristics of the Temperature Field and Reaction Heat of Gas Hydration
In order to study the temperature distribution and heat transfer law in the gas hydrate formation and decomposition process, a visualized experimental system is used to study the reaction heat of methane hydrate formation process and the temperature distribution in the methane hydration in the two systems. Based on the experimental data and the equation for reaction heat calculation, the reaction heat in the two experimental systems is calculated, the effect of the addition of non-ionic surfactant sorbitan stearate (Span 60) on the methane hydration reaction system temperature field is studied. The results show that the addition of Span 60 can contribute to the increase both in the number of methane hydrates and in the quantity of corresponding reaction heat, thereby increasing the temperature of the hydration reaction system and the rising rate of temperature. On the basis of analysis on the Span 60 molecular structure, its mechanism of action has been studied. The process and matters needing attention of measuring the morphology and change characteristics of methane hydrate particles by cryogenic scanning electron microscope are described.