メタノールの触媒酸化におよぼすNOの影響

抄録

The effects of NO on catalytic oxidation of methanol and HC were experimentally investigated. Prepared gas which contained N₂, O₂, C₃H₈, CH₃ OH and NO was passed through the oxidation and three-way catalysts designed for motor vehicles. The changes in unburned species were examined under the conditions of inlet temperature and space velocity ranges of 400∼525K and 2.5∼7.5 ×10⁴/h, respectively. The presence of NO made the HC made the HC oxidation ratio high, but it made the methanol oxidation ratio low in the catalysts bed. Furthermore, it was observed that formaldehyde generation from methanol in the catalysts increased under the presence of NO. From these results, it can be concluded that NO emission plays an important role in the catalytic oxidation reaction. Thus, the effects of NO should be considered in the design on of motor vehicle catalyst.