明胶层中的扩散和反应的动力学研究 (Ⅱ)扩散伴随二级反应的动力学模型

KINETICS OF DIFFUSION WITH CHEMICAL REACTIONS IN GELATIN LAYER (Ⅱ) NUMERICAL MODELING OF DIFFUSION WITH A SECOND-ORDER REACTION

设计一个数值模型用来描述反应物在明胶层中边扩散边与另一种反应物发生二级反应的动力学过程。这个模型与相应的动力学实验相结合可以测出反应物在明胶层中的扩散系数和反应速率常数。在动力学参数齐备的情况下,可以预测动力学过程,并且提供反应物和产物在明胶层中不同时间的空间分布等各种重要的中间过程的描述。模型为研究明胶层中的反应动力学过程提供了有效的分析工具。

A numerical model was designed to describe kinetics for a reactant to diffuse with a second-order reaction with another reactant in a gelatin layer. Using the combination of the model with corresponding experimental observation, the important kinetic parameters, the diffusion coefficient and the rate constant could be obtained. When all of kinetic parameters were available, the model could reproduce the kinetic curves obtained from experiments and give some information on intermediate processes, such as the space distributions of reactants and product with different times. This model might be considered as a quite powerful tool to analyse and study the processes of diffusion with chemical reactions in gelatin layer.