Design And Implementation Of Hydrogen Generator

Hydrogen-oxygen fuel cell is one of the hotspot of the new energy research field, while the production and storage of hydrogen by a safe, stable and efficient method has always been the constraint of the development of hydrogen-oxygen fuel cell. The alkaline solution of sodium borohydride is a candidate for hydrogen storage due to its high hydrogen capacity and high stability. This paper offers the design and implementation of a MEMS hydrogen generator based on alkaline solution of sodium borohydride and come up with a new method of hydrogen generation.By using COMSOL Multiphysics, this paper conducts the theoretical analysis of the MEMS hydrogen generator, and offers the improvement projects to provide the theoretic foundations for hydrogen generator. This paper analyzes the catalytic performances of the Co-P-B catalyst under gradient calcination temperatures and catalyst loading conditions, and obtains the optimum technical parameters for the catalyst. By summarizing the technological difficulties of hydrogen generator, this paper conducts the design and implementation of the hydrogen generation system, conducts hydrogen generation performance testing and hydrogen-oxygen fuel cell performance testing by combining the hydrogen generator and hydrogen fuel cell. The results are as follows. By using asymmetric structure and double-layer structure, the fuel utilization efficiency and the inflow range of the fuel is significantly improved. The optimum operation parameters for the catalyst are calcinations temperature of 250 degree Celsius and catalyst loading of 216.8 milligram, under which condition the catalytic efficiency is 2.078L/(min*g). The starting time of the designed hydrogen generator is about 2 minutes, while the stable output of hydrogen is about 900ml/min which does not show significant decay in 60 minutes. For the integrated miniwatt hydrogen fuel cell, the maximum power output is 14.9W.