The selective catalytic reduction of nitrogen monoxide over the metallosilicate catalyst

• Main Author: 張育陞
• Other Authors: 鄭紀民
• Format: Others
• Language: zh-TW
• Published: 2003
• Online Access: http://ndltd.ncl.edu.tw/handle/19903046914767537687

碩士 === 國立中興大學 === 化學工程學系 === 91 === MCM-41 is the designation of a new of mesoporous structure. The first synthesized mesoporous solid was showed a regularly ordered pore arrangement and a very narrow pore-size distribution. The research interest focused on the characterization and the technical applications. The uniform mesoporous structure in metallosilicate (Cu-MCM-41) catalysts was confirmed by X-ray diffraction, BET surface area, Raman spectroscopy and ICP technique. The copper additive would result in a larger pore size. The higher the concentration was, the larger the pore size will be. Incorporation of transition metals into the wall structure is necessary in the preparation of mesoporous redox-catalysts. We appraise the metallosilicate and selecting suitable catalysts to experiment on the selective catalytic reaction. The elective catalytic reaction will be optimized by the different concentration of oxygen, C3H8/NO feed ratio and reaction temperature. The reaction product concentration was detected by GC analysis and confirmed the products are N2 and other by-products CO, CO2, H2O etc. The catalytic results indicate that the conversion increases with increasing temperature. When the concentration of oxygen and C3H8/NO feed ratio on Cu-MCM-41 were about lower 0.2% and 1.0 respectively, the highest reactivity will be obtained. In addition, the NO conversion increases with increasing of copper concentrations in Cu-MCM-41 catalysts. The catalytic properties of metallosilicate indeed related to the concentrations of copper additive.