(氮气+四氢呋喃+水)体系水合物的生长动力学

建立了高压混相全透明循环管路装置，用以考察流动体系中水合物的生长速率，工作压力可达4MPa。采用该系统，研究了在四氢呋喃存在时N2-水体系中水合物的生长动力学规律。实验结果表明，含N2体系水合物的生长速率随体系初始压力的升高而加快。建立了水合物宏观生长动力学模型，该模型考虑了体系压力和水合物体积分率的影响，可用于计算N2的消耗量，其不同初始压力时的计算值与实测值的平均相对误差的平均值为4．3％。计算了N2-四氢呋喃-水体系在各实验条件下的初始反应速率，计算结果表明，初始反应速率随着初始压力的增加而增大；并与相同条件下甲烷-水体系在四氢呋喃存在时生成水合物的初始反应速率做了比较。

THE KINETICS OF HYDRATE GROWTH FOR(NITROGEN + TETRAHYDROFURAN + WATER) SYSTEM

A set of transparent double-pipe flow loop device was built to study the kinetics of hydrate at the multiphase flow conditions, and the pressure can be up to 4 MPa. The kinetics of hydrate growth of N_2 in the system of N_2-H_2O with the presence of tetrahydrofuran(C_4H_8O) was studied in this flow loop system at the initial pressure of 0.9, 1.3, 1.7 and 2.1 MPa, respectively. The experimental results showed that the growth rate of N_2 hydrate increased with the increase of initial pressure. A corresponding kinetic model was established by considering the influences of system pressure and volumetric fraction of hydrate phase. The model can be used to calculate N_2 consumption, for which the average value of average relative errors calculated by the kinetics model for (N_2 C_4H_8O H_2O) system at different initial pressures was only 4.3%. The initial reaction rates at different conditions were also obtained according to the kinetics model, which was dependent on the initial pressure. The initial reaction rate of (CH_4 C_4H_8O H_2O) system is much higher than that of (N_2 C_4H_8O H_2O) system because of the different properties of N_2, CH_4 and C_4H_8O when the hydrate formed.