| MnO2-CeO2/Ti0.25Zr0.25Al0.5O1.75整体式催化剂的低温NH3选择性催化还原NO性能研究 | |
| Catalytic Performance of MnO2-CeO2/Ti0.25Zr0.25Al0.5O1.75 Monolith Catalyst for Low Temperature Selective Catalytic Reduction of NO with NH3 | |
| 摘要: 采用共沉淀法制备了TiO2(T)、Ti0.5Zr0.5O2(TZ)和Ti0.25Zr0.25Al0.5O1.75(TZA)载体材料，并以MnO2和CeO2为活性组分，以T、TZ和TZA为载体，制备了3种整体式催化剂。对催化剂进行了低温N2吸附脱附、储氧量(OSC)、N | |
| 关键词: 低温选择性催化还原(SCR) 氮氧化物 催化 整体式催化剂 | |
| 基金项目: | |
| Abstract: TiO2(T), Ti0.5Zr0.5O2(TZ) and Ti0.25Zr0.25Al0.5O1.75(TZA) were prepared by co-precipitation. Three monolith catalysts were prepared using MnO2 and CeO2 as active components supported on T, TZ and TZA, respectively. The catalysts were characterized by N2 adsorption-desorption at low temperature, oxygen storage capacity(OSC)，NH3-TPD and XPS. The low temperature catalytic activities as well as resistance to SO2 and H2O in the presence of excessive O2 were studied. The results indicate that the catalyst of MnO2-CeO2/Ti0.25Zr0.25Al0.5O1.75(TZAC) possesses the largest specific surface area, oxygen storage capacity, pore volume, the most surface acidic amount and the strongest surface acidity, which are important for NH3-Selective Catalytic Reaction(NH3-SCR). The results of the activity test show that TZAC has the best catalytic activity at low temperature and quite wide temperature window, the light-off(conversion of 50%) temperature for NO is 102 ℃, and conversion of NO in the range of 175～325 ℃ is almost 100%. Further more, TZAC exhibits excellent resistance to SO2 and H2O. | |
| Keywords: Low temperature selective catalytic reduction(SCR) nitrogen oxide catalysis Monolith catalyst | |
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| 张秋林,林 涛,李 伟,徐海迪,龚茂初,陈耀强.MnO2-CeO2/Ti0.25Zr0.25Al0.5O1.75整体式催化剂的低温NH3选择性催化还原NO性能研究[J].无机化学学报,2009,25(3):485-490. | |
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