Research And Structural Optimization Of Methanol Steam Reforming For Hydrogen Production With Non-uniform Distributed Micro-channel Carrier

In order to find out the performance and optimize the methanol reforming reactor with non-uniform distribution catalyzer carrier, a completely new micro-channel methanol reactor integrated functions of heating, evaporation and reforming is designed baseing on the principle of methanol reforming. After that, processing, testing and simulation are going to carry out on the reactor. And the main research content of this paper are as follows:First, designed a new microchannel reformer integrated with evaporation unit and reforming unit. In order to research the influence of catalyst distribution to fluid flow and heat transfer of the reformer, Catalyst channel plates with two kinds of different cross-section shapes and seven kinds of different distribution patterns was designed to observe the function of the structural parameters on reactor performance by using contrast experiment.Second, use traditional milling process to achieve micro-size features and designe the micro-channel machining process in the traditional milling tool by using saw and gear milling cutters. In order to realize the quality control of the micro-channel in milling process, qualitative analysis through experiment was made to see the impact of milling parameters on the surface quality of the channel wall and cutting out burr and the bottom burr.Third, In order to observe the impact of cross-section shapes and distribution patterns of the micro-channel on the performance of the reformer, experimental studies was made under different inlet space velocity and reaction temperature. Then numerical simulation on velocity distribution of the reformer was made by using Fluent software, and a parameterδv as a indicator of the uniformity of velocity distribution in the reformer was choosen to evaluate the impact of cross-section shapes and distribution patterns of the micro-channel on the performance of the reformer, and attempted to provide a theoretical basis for the experimental results.Finally, excluding a few cases, both experimental and numerical simulation results showed that cross-section shape or distribution pattern of the micro-channel with more uniform fluid velocity distribution usually had better experimental performance in the reformer.