【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.更多还原

【Abstract】 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 adsorption,which explains the uncertainty of gas-hydrate composing appropriately. 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 comparision between the calculated and experimental data indicates that the average deviation is 9.6%, the maximum and the minimum deviations approach 15.9% and 1.6% respectively.更多还原