Affect the performance factors of the fuel processor

When using natural gas as a fuel gas, a fuel processor is needed to convert natural gas or a mixture of natural gas and HO into. In addition to most of the H, the converted gas contains COO and traces of CO. In addition, depending on the fuel processor, the conversion gas may also contain N2. In any PEMFC system, the inert gas in the gas is converted and other gases. Gases will affect the performance of the battery to varying degrees.

Partial oxidation of hydrogen under the acronym POM method has drawn wide attention since the 1990s, and has developed rapidly in the past 10 years. But so far, there is no report of industrialization of this technology. The main chemical reaction of the POM method is as follows: The POM method is a light exothermic reaction, and the ratio of the amount of H and CO substances generated is 2. The reaction conditions are atmospheric pressure and high temperature, and the catalyst used is mainly a supported metal catalyst.

After reforming, the generated gas components include CH, steam, etc. At this time, the CO content is high, and more H2 can be obtained by the shift reaction of steam and CO. The transformation equation is as follows: The CO shift reaction is a reversible reaction, and therefore Every effort is made to make the reaction proceed in favor of H, and residual, unconverted CO is removed in the next process.

The operating temperature of the 214CO removal PEMFC is low, about 80e, the anode is prone to CO poisoning and lose activity, so it is necessary to reduce the volume fraction of CO in the fuel gas to less than 10@10, which is reduced to this in the CO conversion. The level is difficult, so the methods used to further remove the CO in the CO. There are membrane purification, pressure shift adsorption, selective methanation and CO selective oxidation. Most of the removal of CO abroad uses palladium membrane separation or selective oxidation.