Identification of Hydrogen Generation Characteristics from Activated Aluminum Particles Using ARMA Model on the Assumption of the Applications for Fuel-cell Electric Vehicle

Abstract

The purpose of this study is to describe the experiments of hydrogen generation from water molecules reacting with activated aluminum particles and the identification of its characteristics using an ARMA model on the assumption of the applications for a fuel-cell vehicle. Because 1 gram of the activated aluminum particles can generate about 1.1 liters of pure hydrogen, they have application possibility as the hydrogen resource of a fuel cell car. However, the details of hydrogen generation characteristics by this reaction are not well known. The reaction has non-linearity and time-varying due to the characteristics of the sample, the external environment and so on. Therefore, it is difficult to construct a mathematical model based on the physiochemical law of the reaction. Here, the dynamic characteristics of hydrogen generation are assumed to be described as a linear ARMA model using the reaction temperature and hydrogen generation. The parameters of ARMA model are identified by a constant trace adaptive algorithm using the measured data. The outputs of the ARMA model are well accorded with the measured data.