The Design And Research Of Aluminum Alloy-based Mirco Methanol Steam Reformer

Fuel cell can convert chemical energy directly into electrical energy, is a new applied technology for efficiently and cleanly using hydrogen energy, has a vast application prospects. However, the approach to getting the hydrogen source of fuel cell is more restrictive. The technology of steam reforming of methanol can produce hydrogen-rich gas by the reaction of methanol and water, providing stable and sustainable hydrogen for the fuel cell. Therefore, the technology of steam reforming of methanol has considerable developed, and has a mount of achievements. But in the field of portable power, due to the small size, catalyst coating is difficult for micro methanol steaming reformer, and adhesion of the catalyst is poor, seriously reducing the stability and service life of methanol reformer.This thesis analyzed the development of methanol reforming technology, the research status of catalyst and the research condition of the reformer. Considering the complexity of methanol steam reforming reaction, the thesis used numerical models to analyze the performance of different reformers for optimizing the design of reformer. The performance of methanol steaming reformer had great difference due to its different working environment. We studied the effects of methanol steaming reformer in different operating conditions, to provide a reference for the actual work. The catalyst for methanol steam reformer has bad adhesion, and easily falls off from the wall of channel. Therefore, this thesis innovatively proposed a new way that utilizing the micro-arc oxidation technology to form a porous ceramic oxide film on the surface of the channel wall, providing a better substrate to adhesive for the reforming catalyst. Also the thesis studied the performance of the novel reformer, compared with the conventional reformer.Finally, a fuel cell system including the novel methanol steaming reformer was constituted. The thesis studied its performance such as output voltage, power density, comparing with DMFC system and PEMFC system. The results can provide a reference for the application of methanol steaming reformer.