| 초록 |
The catalytic activities of tungstophosphoric acid and Pt loaded cubic mesoporous materials(MCM-48 and SBA-1) for the catalytic reduction of NOx with propylene in the presence of water vapor were studied respectively. Before MCM-48 and SBA-1 supported Pt with 1wt% were prepared by incipient wetness impregnation, HPW(H3PW12O40) was loaded between 0 and 60wt%. The structure and the physical properties were characterized by means of powder X-ray diffraction(XRD) and BET. The number of accessible Pt atoms of Mesoporous materials supported Pt and HPW containing catalysts was determined by H2-chemisorption and CO-adsorption. In order to characterize the type and concentration of acid sites, adsorption of pyridine was used. |
