| 초록 |
De-NOx SCR catalysts for automobile applications have been developed mostly with zeolite-based catalyst coated mainly on ceramic honeycomb substrate made of cordierite ceramic. For marine applications demanding high mechanical strength, good resistance against vibration, low pressure drop of the exhaust gas, low catalyst volume, and good thermal management, however, metallic substrates can present several advantageous properties such as higher mechanical resistance and thermal conductivity, thinner walls with thickness less than 100μm allowing higher cell densities, low substrate volume, and lower pressure drop. But the ceramic-based catalyst coating on flat metal surfaces could be less durable because the bonding property between ceramic and metallic materials is basically not good. SCR catalyst coatings on costly effective metallic substrate such as STS-444 foil using powder spray coating technique for potential marine and automobile applications, and their De-NOx performance and catalyst adhesion property with microstructural analysis will be presented. |
