制备参数对V_2O_5/TiO_2催化剂脱硝性能的影响  

Effects of Preparation Parameters on the DeNOx Performance of V_2O_5/TiO_2 Catalysts

作　　者：姜烨[1] 高翔[2] 张涌新[2] 

机构地区：[1]中国石油大学(华东)储运与建筑工程学院,山东青岛266580 [2]能源清洁利用国家重点实验室(浙江大学),杭州310027

出　　处：《华东电力》2013年第2期463-470,共8页East China Electric Power

基　　金：国家863计划资助项目(2010AA065002);山东省自然科学基金资助项目(ZR2011EEQ004)~~

摘　　要：研究分析了制备参数对V2O5/TiO2催化剂选择性催化还原脱硝性能的影响,考察了V2O5/TiO2催化剂的抗水抗硫性能。结果表明,载体TiO2的比表面积越大,结晶度越弱,越有利于V2O5/TiO2催化剂上的SCR反应;在煅烧温度为500℃和煅烧时间为5 h的条件下制备的1 wt.%V2O5/TiO2催化剂具有最高的脱硝活性,在典型的SCR反应温度范围(300～400℃),NO转化率达到92.7%～98.8%;随着催化剂上V2O5担载量的增加,有序的V2O5晶体随之增加,反应温度的升高将导致N2O生成量的增多,降低催化剂的选择性;当烟气中含有10%H2O和(0～0.2%)SO2时,对V2O5/TiO2催化剂的脱硝活性影响不大。This paper studies the effects of preparation parameters on the performance of V205/TiO2 catalysts for se- lective catalytic reduction of NOx, as well as its tolerance to water and sulfur. The increased TiO2 specific surface ar- ea and the lowered crystallinity can promote the SCR reaction over V205/TiO2 catalysts; the 1 wt. % V2O5/TiO2 cat- alyst, calcinated at 500 ℃ for 5 h, possesses the maximum DeNOx capability; the NO conversion rate reaches 92.7 ～98.8% at the typical SCR reaction temperature （300 -400 ℃）. The increase of V205 load on catalysts and the subsequent increase of the orderly V205 crystallites lead to higher reaction temperature and more N20 formation, thereby decreasing the selectivity of the catalysts. 10% H20 and （0 -0.2% ） SO2 in the simulated gas has little effect on the DeNO. activity of V2O5/TiO2 catalysts.

关 键 词：选择性催化还原 V2O5/TIO2催化剂 制备参数 NO 

分 类 号：X511[环境科学与工程—环境工程]