气体水合物膜生长动力学研究进展

由于大多数水合物客体不溶于水,水相与客体相界面首先形成一层气体水合物膜,气体水合物膜生长是水合物生长的主要形式,研究水合物膜生长规律对于理解水合物生长动力学及进一步开发促进和抑制水合物生长的应用技术具有重要意义.本文综述了近年来气体水合物膜生长形态、横向生长和增厚生长的理论和实验研究进展.首先介绍了不同客体-水体系(包括气/液界面、液/液界面和气-液-液体系)形成的水合物膜生长形态随实验条件的变化规律,然后分别从横向生长和增厚生长两方面总结了水合物膜生长的实验和模型方面的研究工作,阐述了常见的膜生长速率和膜厚度的测量方法,分析了水合物膜生长的传热和传质机理.同时展望了未来水合物膜生长研究的发展方向.

Review on hydrate film growth kinetics

As hydrate formers are mostly water-insoluble, gas hydrate film firstly formed at the interface between water phase and hydrate former （guest） phase. Hydrate film is the main form in hydrate growth process, the state of the art in research of gas hydrate film growth is leading us to overall understanding of hydrate growth kinetics and development of technologies to promote or inhibit hydrate growth. This review provided an overview of the observations of hydrate film morphologies, experimental and modeling investigations to lateral and vertical growth of hydrate film. Firstly, we reviewed the morphological observations of hydrate formation at hydrate former/water interfaces occurring in different cases, such as gas/water interface, liquid guest/water interface, and gas-liquid guest-water system. Secondly, the experimental and modeling investigations to lateral growth and vertical growth of hydrate film were summarized, respectively. The experimental measurements of hydrate film growth rate and thickness were also reviewed. The mechanisms of heat transfer and mass transfer in modeling hydrate film growth were concluded. Finally, suggestions for further developments on the studies of hydrate film growth kinetics were presented.