中文摘要：

采用乙醚萃取法、浸渍法制备了具有吸附-分解NOx功能的多酸催化新体系，并对其进行了IR、XRD,TEM表征，在固定床催化反应器中考察了体系对NOx的吸附与分解性能。结果表明，钨系杂多酸优于钼系，H3PMo12-xWxO40（x=1、3、6、12）随着取代钼的钨原子数目增多，对NOx的吸附能力增强；二氧化钛、碳纳米管均为磷钨酸（HPW）的优良载体，后者对体系有明显的增效作用；TiO2经500℃煅烧后，以磷钨酸水溶液为浸渍剂，HPW负载量为20％时，制得的HPW／TiO2体系的脱硝性能最佳，对NOx的吸附率可达62．8％；混酸（VHNO3：VH2SO4=1：3）能在碳纳米管上引入含氧基团使其在水中的分散性能增强，以水为浸渍溶剂、混酸改性后的碳纳米管为载体制得的HPW／CNT催化体系优于乙醇为浸渍溶剂制备的该催化体系，当HPW负载量为70％时，前者对NOx的吸附率可达73．5％。通过GC—MS检测确认了吸附质催化分解为N2的有效性。

英文摘要：

Several catalysts of heteropoly compounds （HPCs） with the performance of NOx adsorptiondecomposition were prepared by means of ethanol-extraction and impregnation. The catalysts were characterized by IR, XRD and TEM and evaluated in a fixed-bed reactor. The results showed that tungsten containing HPCs were superior to molybdenum containing HPCs for NOx adsorption ; with the increase of the number of molybdenum atoms substituted by tungsten in H3 PMo12-xWxO40 （x = 1 ,3,6,12） , its NOx adsorption efficiency increased. Titania and carbon nanotube （CNT） were good supports for H3 PW12 040 （ HPW ） ; CNT performed better than titania on the adsorption of NOx. When TiO2 was calcinated at 500 ℃ and the HPW loading was 20% , the NOx adsorption efficiency of HPW/TiO2 reached 62.8%. Mixed HNOa/H2SOg with a volume ratio of 1：3 could produce functional groups such as COO- and C = O on the surface of CNT, which could enhance the dispersion of CNT in the aqueous solution. HPW/CNT catalyst prepared with HNO3/H2SO4-modified CNT as support and using water as impregnation solvent was superior to that using ethanol as impregnation solvent; with the HPW loading of 70%, the adsorption efficiency of NOx by HPW/CNT reached 73.5%. The process effectiveness for NOx decomposition into N2 was confirmed by GC-MS analysis.