甲烷水合物分解的缩粒动力学模型

PARTICLE SHRINKING DYNAMIC MODEL FOR METHANE HYDRATE DECOMPOSITION

将温度在零度以上的甲烷水合物的分解过程看作是无固态产物层生成的气固反应,从晶体溶解的角度研究了水合物颗粒的消融问题,推导了颗粒半径随反应时间变化的微分方程,从理论上建立了甲烷水合物分解的缩粒动力学模型。利用前人的实验数据,进行了水合物分解的动力学分析,认为温度在零度以上时,水合物分解反应由界面化学反应过程控制。将实验数据代入模型拟合了甲烷水合物分解反应的活化能E a和表观分解速率常数kr与文献值误差较小。

When the temperature is above zero centigrade, methane hydrate decomposition can be regarded as a gas-solid reaction without solid production layer. From crystal dissolution angle, the paper studied on hydrate particle shrinking problem. The paper related particle radius to reaction time with a differential equation and thus built a particle shrinking model of methane hydrate decomposition. Dynamics analysis was done by use of experimental data from the literature, which indicated that interface chemical reaction was the control of the process. Global reaction velocity constant and the activation energy of methane hydrate decomposition. The results from the model match the experimental data perfectly showing that the model is of high reliability.