Study Of Structure Design And Catalyst Fabrication Of Micro In Methanol Steam Reforming Reactor

With the depletion of fossil fuels,searching for new non-polluting and renewable energy sources has become an important issue in today's society.Fuel cell technology utilizes hydrogen energy,which is one of the most efficient and clean platforms in many new technologies.Hydrogen energy can be easily converted into electricity and heat energy through fuel cells,and the conversion efficiency is much higher than that of traditional energy sources.However,difficulties of hydrogen storage and transportation make it difficult to be widely used for the time being.Because methanol has the advantages of easy availability,easy storage,low toxicity,low reaction temperature for hydrogen production,high hydrogen-carbon ratio and sulfur-free,methanol reforming has attracted great attention at home and abroad.In this paper,the structure model of micro methanol reforming reactor was established to analyze the influence of flow field structure on the hydrogen production performance.The influence of catalyst composition and experimental parameters on the conversion rate of methanol reforming to hydrogen was analyzed by preparing methanol reforming catalyst.Firstly,the structure model of micro methanol reformer was established,and the flow field structure of single channel and parallel channel was analyzed.The flow field structure of single channel was simulated and analyzed to determine the appropriate size of microchannel.On this basis,the influence of parallel flow field structure on methanol conversion rate was further analyzed.The flow velocity and pressure distribution were simulated and analyzed by laminar flow model to determine the channel size.The methanol conversion rate of structure was analyzed by chemical reaction simulation.At last,the size and channel number of parallel flow field were finally determined by all the above analysis.The catalysts directly determine the performance of methanol reforming for hydrogen production.In this paper,Cu/ZnO/Al₂O₃ were used as the catalysts for methanol steam reforming.The effects of preparation conditions of catalysts on the performance of methanol reforming for hydrogen production were key points of research.The results showed that the choice of precipitant had a great influence on the activity of catalyst,the catalyst prepared with sodium carbonate as precipitant had the best performance,the catalyst prepared by co-current co-deposition had the bestcatalytic activity.It can be concluded that the optimum composition of the catalyst was Cu₆₀Zn₃₀Al₁₀.It will pave the way for the further realization of micro methanol reforming fuel cell system through the above research on the related technologies of methanol reforming reactor.