弱电场下THF水合物生成特性

The Influence of Weak Electric Field on the THF Hydrate Formation Characteristics

四氢呋喃(THF)水合物可以在常压、4.4℃时生成,广泛被用于水合物基础研究.本研究中,在反应釜两端的电极板之间施加了不同大小的电压,分析了不同电场强度对THF水合物一次生成、二次生成及三次生成的影响。研究结果显示:电场的存在对THF水合物生长期具有促进作用,加快了水合物的生成。在THF水合物的第二次生成过程中,由于弱电场以及水合物分解水记忆效应的存在,导致了THF水合物在生长期的生成速度增加,并出现了更高的温度峰值。在没有THF氧化反应的情况下,发现水合物快速生长期持续时间缩短。在电场存在条件下,水合物的生成表面以整齐的锯齿形由四周向轴线方向生成。

THF hydrate,which will generate under the condition with atmospheric pressure and the temperature of 277.55 K,which was widely used in hydrate basic research.The influence of electric field intensity on the first,the second and the third THF hydrate formation was investigated in this study.And the electric field intensity was controlled by changing the voltage across the two electrode which was placed on both reactor.The results showed that the existence of electric field can promote the growth of THF hydrate and accelerate the formation of THF hydrate.In the process of the second generation of THF hydrate,because of the existence of weak electric field and the memory effect of hydrate-dissociated water,the growth rate of THF hydrate was increased compared to the first formation process in the growth period of THF hydrate,and led to a higher peak of temperature.In the absence of THF oxidation reaction,the time of rapid growth stage was shortened.In the presence of electric field,the variation of THF hydrate formation characteristics is a neat zigzag surface and it is generated by the direction of the axis.