论文部分内容阅读
通过将水合物的分解过程看作是无固态产物层生成的气固反应过程,结合粒径缩小的收缩核反应模型和分形理论,建立了多孔介质中水合物降压分解的分数维动力学模型,提出了基于水合物分解实验数据计算多孔介质分形维数的方法.分别利用前人的甲烷水合物和CO2水合物降压分解实验数据,对上述分数维动力学模型进行了验证.计算结果表明,用提出的方法所计算得到的多孔介质分形维数与前人的测定结果基本符合;对甲烷水合物和CO2水合物的降压分解过程,提出的分数维动力学分解模型得出了和实验结果基本一致的预测,绝对平均误差(AAD)小于10%.
The fractal kinetic model of hydrate depressurization in porous media was established by considering the decomposition process of hydrate as the process of gas-solid reaction without the formation of solid product layer and the shrinking nuclear reaction model and the fractal theory of particle size reduction. The fractal dimension of porous media was calculated based on experimental data of hydrate dissociation. The experimental data of methane hydrate and CO2 hydrate depressurization were respectively used to validate the above fractal kinetic model. The calculation results show that, The fractal dimension of porous media calculated by the proposed method is basically consistent with the predecessor’s determination results. The fractal kinetic decomposition model proposed for the step-down decomposition of methane hydrate and CO2 hydrate is given and the experimental results Basically consistent predictions, the absolute mean error (AAD) is less than 10%.