Preparation Of The Copper Based Catalyst On Ceramic Membrance For Micro Methanol Refformer

With the development of microelectronics integration technology, the volume of electronic products become smaller and smaller and the power miniaturization has become a trend. The fuel cell has many features, such as small size, light weight and high energy density, it will have broad application prospects in the field of portable power. The micro methanol reformer is suitable to provide mobile hydrogen for the fuel cell, because it has the advantages of the low content of CO, the high concentration of H2 and the mild reaction condition. However, the micro methanol reforming devices have problems of catalyst, such as uneven distribution, low efficiency and poor adhesion. In this paper, we study the manner of catalyst supported, the preparation of catalyst and the reforming reaction parameters in the micro channel methanol reformer.Firstly, the model of parallel channel methanol reformer is designed, a number of conditions for the reforming reaction are simulated, and some theory basis that is found through the results of simulations is provided for the subsequent experiments. Secondly, the structure of the micro methanol reformer is designed and the catalyst performance test platform is established. Thirdly, the catalyst-supporting manner is studied by experiments. We discuss the effects of binders, the treatment of aluminum surface on the catalyst performance, find a catalyst-supporting manner of uniform distribution, great adsorption and high performance to improve the efficiency of catalyst, the utilization of reactant and the stability of reformer. Finally, the preparation technology of copper-based catalyst is studied. We mainly discussed the influence of precipitant, precipitate manner, calcination temperature and atomic ratio on catalyst performance.Through experiment it is concluded that when the bentonite content is 10%, oxidation ceramic membrane is grown on aluminium alloy surface, the dispersion and adhesion of the catalyst supported on carrier is best. When the precipitation agent is sodium carbonate, the precipitation method isanti addition, the calcination temperature is 450 ℃, the copper zinc aluminum atom ratio is 6:3:1, the performance of copper-based catalyst is best. When the reaction temperature is 240 ℃ and the supply rate of methanol is 28.5 mg/min, the methanol conversion rate can reach 95% or more and the CO content is less than 1%. This result can meet the requirement of the proton exchange membrane fuel cell to the mobile hydrogen source.