天然气水合物的生长动力学研究述评

Study of the Kinetics of Natural Gas Hydrate Formation

对天然气水合物进行了介绍,从冰点以上和冰点以下两个温区对国内外水合物生长动力学的研究现状进行了分类与评述。对冰点以上晶体生长的动力学,从Vysniauskas & Bishnoi模型、Lekvam & Ruoff模型、Englezos模型、Englezos简化模型和Chen-Guo模型进行了讨论;对冰点以下的生长动力学,讨论了Sloan&Fleyfel模型和Christiansen & Sloan模型,对各自的优点进行了详细的分析,并指出了所存在的局限性。对水合物生成动力学的进一步研究进行了展望。同时还分析了临界成核半径和表面活性剂之间的关系。

Natural gas hydrate is introduced.The present research state of NGH growth kinetics above and below ice point at home and abroad is classified and commented.Concerning hydrate growth kinetics above ice point,the Vysniauskas ＆ Bishnoi model,Lekvam＆Ruoff model,Englezos model,Englezos simplified model and Chen-Guo model are discussed.As for below ice point,growth kinetics is reviewed based on Sloan ＆ Fleyfel model and Christiansen ＆ Sloan model,the merits of which are analyzed in detail and the existing limitation is pointed out.Future development tendency of hydrate growth kinetics is forecasted.At the same time,the relationship between critical nucleation radius and surfactant are analysed.