烟气NO氧化催化剂Cu-V/Ti-PILCs的制备及其硫水稳定性
Preparation and stability of Cu/V exchanged TiO2-pillared clay for oxidization of NO in flue gas
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摘要: 采用等体积浸渍法制备了以钛交联粘土为载体，Cu与V氧化物为活性组分的烟气NO氧化催化剂（Cu-V/Ti-PILCs），并考察了各种制备条件下催化剂的活性及稳定性。结果显示，当V水/V丙酮=1∶2，负载4% CuO和2% V2O5，并在500℃煅烧时制得的Cu-V/Ti-PILCs催化剂，在NO浓度为350 mg/m3，O2体积分数10%，N2平衡，空速12 000 h-1，NO的氧化度可以达到48%，并在含7.3%(V)和700 mg/m2 SO2的模拟烟气中，稳定活性10 h以上，初步显示其耐硫、水中毒性能良好。Abstract: Cu/V exchanged TiO2-pillared clays (Cu-V/Ti-PILCs) for catalytic oxidization of NO in flue gas was prepared by equal volume impregnation method; and their catalytic activity and stability at different preparation conditions were investigated. Experimental results showed that Cu-V/Ti-PILCs prepared under conditions of VH2O/Vacetone=1∶2，4% of CuO load，2% of V2O5 load， and calcination temperature of 500℃ reached 48% of oxidation of NOx when NO concentration was 350 mg/m3，O2 was 10% (V)， N2 was balance， and superficial space velocity was 12 000 h-1. It preserved its activity more than 10 hours even with 7.3%(V) water vapor and 700 mg/m3 SO2 in simulated flue gas，showing good resistibility to SO2 and H2O poisoning.
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Key words:
- flue gas denitrification /
- Ti-PILCs /
- NO oxidation
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