Study on the hydrogen storage properties of Ca(BH4)2 composites using taguchi method / Zarina Omar

The hydrogen storage properties of Ca(BH4)2 composites for hydrogen energy applications was studied since light metal borohydrides Ca(BH4)2 have great potential as an effective hydrogen storage facility. This study has been conducted to improve Ca(BH4)2's hydrogen storage efficiency, such as doping with different types of catalysts. In this study, in order to improve the selection of the better hydrogen storage properties, Taguchi Method is being selected as a suitable statistical approach to analyse the optimum factors and responses. The objective of this study is to analyse the performance characteristic of hydrogen storage by employing the signal-to-noise ratio and the analysis of variance (AnoVa). In this analysis, material and catalyst are the two factors that are being considered. To analyse the relative importance of the method parameter, analysis of variance (AnoVa) was performed. First, the material and system both are insignificant on decomposition temperature. Next, on hydrogen release both material and catalyst are significant. Finally, on activation energy, both material and catalyst are insignificant. The required material and catalyst that have been chosen to obtain an optimum temperature are on decomposition temperature are (Ca(BH4)2)_MgH and None, while on hydrogen release are Ca(BH4)2 and none, and lastly on activation energy are Ca(BH4)2 and NbF5. The signal-to-noise ratio can analyse that the optimum parameter on decomposition temperature is at 250°C, on the hydrogen release is 9.6wt%, and on the activation energy is 51kJ/mol. In other words, Taguchi optimization can be a good method to enhance potential selective material preparation and catalyst to improve hydrogen storage properties in the future.