水溶性咪唑类离子液体中天然气水合物生成特性研究

项目名称： 水溶性咪唑类离子液体中天然气水合物生成特性研究

项目编号： No.51506202

项目类型： 青年科学基金项目

立项/批准年度： 2016

项目学科： 能源与动力工程

项目作者： 龙臻

作者单位： 中国科学院广州能源研究所

项目金额： 20万元

中文摘要： 随着深海油气资源的开发进入更深水域作业环境，天然气水合物风险加剧，现有水合物抑制剂难以满足工业水合物抑制的需求。咪唑类离子液体因具有水合物形成热力学和动力学双重抑制性能视为一种有前途的水合物抑制剂。本项目拟采用实验模拟及理论模拟相结合的方法建立新型水溶性咪唑类离子液体水合物抑制剂体系，主要研究：（1）离子液体中天然气水合物生成特性，考察含不同官能团的水溶性咪唑离子液体、不同浓度、气体组成、温度、压力及离子液体组分下天然气水合物生成条件及宏观生成动力学特性；（2）离子液体特性对天然气水合物微观生成特性的影响，利用XRD衍射仪和拉曼光谱仪测试水合物的晶体结构和稳定性以及气体分子在水合物笼中的形态和分布特征规律；（3）运用分子动力学模拟研究离子液体对天然气水合物生成影响的作用机理。通过本项目的研究，将为水溶性离子液体型水合物抑制剂新技术的发展提供实验参考数据和理论支持。

中文关键词： 气体水合物；离子液体；生成；热力学；动力学

英文摘要： As the oil gas production and exploration moves to deeper seas, the risks of the gas hydrate plug are becoming bigger and the existing inhibitors still cannot give an economic solution. It stimulate the search for the combination of thermodynamic and kinetics inhibitors. Water-soluble imidazolium-based ionic liquids have recently attracted attention, referred to as dual function inhibitors, which can act as both thermodynamic and kinetic inhibitors. Based on experimental and theoretical simulations, this project will carry out the following work: (1) formation characteristics of natural gas hydrate in different water-soluble imidazolium-based ionic liquids aqueous solutions, investigating the formation conditions and macro formation kinetics characteristics in different functional groups, concentrations, gas components, temperatures, pressures and ionic liquid compositions; (2) the effect of the ionic liquids on the micro formation characteristics of natural gas hydrate, through XRD and laser Raman spectroscopy to test the crystal structure and obtain the morphology and distribution characteristics of gas molecules in the hydrate cages; (3) mechanism study of the effect of the ionic liquids on the formation of natural gas by the molecular dynamic simulation. It is considered that the basic data and theories in this project will provide reliable supports for the future development and application of the imidazolium-based ionic liquids hydrate inhibitors in deep water oil and gas industry.

英文关键词： gas hydrate;ionic liquid;formation;thermodynamics ;kinetics