天然气水合物生成动力学机理的研究  

Study on Kinetics of Natural Gas Hydrate Formation

作　　者：陈孝彦[1] 何小社[1] 何晓霞[1] 王胜杰[1] 刘芙蓉[1] 

机构地区：[1]西安交通大学环境与化学工程学院

出　　处：《西安交通大学学报》2004年第1期85-88,共4页Journal of Xi'an Jiaotong University

基　　金：国家自然科学基金资助项目(40272064).

摘　　要：对天然气的气 水体系进行了研究,提出了一种新的天然气水合物生成机理,认为水合物晶核的生长经历了溶解、水合物骨架形成、扩散和吸附4个阶段,很好地解释了水合物组成的不确定性.据此机理对水合物在成核以后生成的动力学方程进行了推导,引入了有效面积分率、压力指数、过冷度校正参数等,得到了气 水体系水合物生成的改进的动力学方程.用遗传算法对方程中的参数进行拟合的结果表明,由方程计算所得的水合物生成速率与实验结果的最大误差为15.9%,最小误差为1.6%,平均误差为9.6%,说明拟合结果准确.The adsorption mechanism is introduced into the study of the natural gas-hydrate in gas-water system, and a formation mechanism of gas-hydrate is proposed. It is considered that the nuclei growing-up undergoes four steps: resolving, forming of gas-hydrate framework, diffusing and adsorping, which appropriately explain the uncertainty of gas-hydrate composing. Based on this mechanism, the kinetics equation of gas-hydrate formation after nucleation is deduced, and area weight coefficient, pressure index and correction coefficient of super cooling degree are introduced into the deducing process. A comparison between the calculated and experimental data indicates that the average deviation is 9.6%, the maximum and the minimum deviations approach to 15.9% and 1.6% respectively.

关 键 词：天然气水合物 生成机理 动力学 吸附 

分 类 号：TQ026[化学工程]