Mathematical model for the dynamic P-C-T curves of the MmNi(4.6)Al(0.2)Fe(0.2)V(0.03) alloy in a tubular reactor

Abstract

In order to simulate the dynamic P-C-T curves of the MmNi(4.6)Al(0.2)Fe(0.2)V(0.03) alloy, a mathematical model has been established and solved numerically by the method of finite domains. The numerical simulation is used to present the time-space evolution of the temperature, the pressure and the hydrogen concentration of the hydride powders in the reactor and to determine the effects of reactor geometry and operation parameters such as hydrogen flow rate and temperature of the water bath. It is assumed that there is no pressure gradient in the reaction bed and the reaction occurs throughout the packed bed. The local reaction rate is calculated from the product of the average reaction rate and the factor which is a function of the pressure driving force. The simulated results using this model are quite close to the experimental data. Based on the model, it was possible to predict the dynamic absorption P-C-T curves of MmNi(4.6)Al(0.2)Fe(0.2)V(0.03) alloy in a tubular reactor. Copyright (C) 1996 International Association for Hydrogen Energy