Application of Microchannel Reactor in Fuel Cell System First, the large volume of conventional reactors and the large amount of energy stored in the fuel processing equipment are very dangerous, and the microchannel reactor is more than an order of magnitude smaller than conventional reactors. It has good safety and is therefore suitable for use in automobiles. Or use mobile power; Secondly, currently compressed hydrogen or liquid hydrogen is mostly used in fuel cell vehicles. However, there is no existing compressed hydrogen or liquid hydrogen supply station, and microchannel reactors can use existing gas stations or gas stations to directly pass chemical reactions. The conversion of hydrocarbon fuel to hydrogen feeds the fuel cell, eliminating the need for any new compressed hydrogen or liquid hydrogen supply stations. For these two reasons, microchannel reactors have begun to receive increasing attention. First, liquid gasoline or methanol is vaporized in an evaporator to a vapor state; then, it enters a conversion reactor and generates H2 through a partial oxidation reaction (POX) or a steam reforming reaction (SR) or an autothermal reforming reaction (ATR). CO gas mixture; the gas mixture enters the water gas shift reactor where the CO is reacted; after that, hydrogen gas and a small amount of residual CO gas enters the CO removing device, selectively oxidizing the CO to reach the proton exchange membrane The fuel cell requires less than 10-5; finally H2 enters the fuel cell to react to generate electricity. The microchannel fuel evaporator, with a size of 9cm*10cm*3.8cm, a mass of 1.8kg and a gasoline evaporation of 260mL/min, can provide fuel for a 50kW fuel cell fuel processing system. The working process of the evaporator is that the exhaust gas discharged from the anode of the fuel cell (containing 8% of H2) enters the catalytic plate at the upper part of the evaporator. Under the catalytic action of Pd, H2 generates an oxidation reaction to release heat and heat the exhaust gas, and then the exhaust gas enters the lower part. A microchannel heat exchanger vaporizes the cold fluid (gasoline) on the other side of the heat exchanger. The upper catalytic plate of the evaporator uses Ni as the basic material, and 60 micropores are opened on each 25.4 mm (1 in) Ni plate. After the treatment, the catalyst Pd is loaded in the micropores. This Pd/Ni microporous structure allows the diffusion path of gas molecules to be much smaller than the conventional system gas diffusion paths using large-particle catalysts, thereby accelerating the oxidation exothermic reaction of H2. Tunnel Steel Pipe,Spiral Ground Pile Pipe,Dz80 Grouting Steel Pipe,R780 Grouting Steel Pipe Shandong Fengmai Metal Materials Co., Ltd. , https://www.gghlw.com
Application of fuel cells in automobiles