Abstract
A series of phosphorylation and blank CeSn0.8W0.6Ox/TiAl0.2Si0.1Oy catalysts prepared by extrusion molding were tested for NH3-SCR of NO, and were characterized by techniques of X-ray diffraction (XRD), Brumauer-Emmett-Teller (N2-BET), environmental scanning electron microscope (ESEM), temperature programmed reduction (H2-TPR) and temperature programmed desorption (NH3-TPD). Effects of phosphorylation on catalytic activity and sulfur-resisting performance of the CeSn0.8W0.6Ox/TiAl0.2Si0.1Oy for NH3-SCR of NO were mainly studied. Results showed that the phosphorylation improved the catalytic activity and sulfur-resisting performance in an active temperature window of 300–440 °C, and the phosphorylation catalyst with 0.4 wt.% H3PO4 exhibited the best catalytic performance and the strongest sulfur-resisting performance. Analysis showed that the phosphorylation increased specific surface area, enhanced the surface acidity and improved redox properties.
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