低温催化复合功能滤料脱硝协同脱汞性能研究  

Study on Simultaneous Denitrification and Mercury Oxidation by Low-temperature Catalytic PPS Filter Materials

作　　者：吴林虎 刘猛[2] 李银生 Wu Linhu;Liu Meng;Li Yinsheng(Nanjing Dongda Energy Engineering Design Institute Co.,Ltd.,Nanjing 210096,China;School of Energy and Environment,Southeatt University,Nanjing 210096,China)

机构地区：[1]南京东大能源工程设计院有限责任公司,南京210096 [2]东南大学能源与环境学院,南京210096

出　　处：《发电设备》2019年第6期399-403,共5页Power Equipment

基　　金：江苏省科技成果转化专项资金(SBA2018020041)

摘　　要：以表面活性剂十二烷基硫酸钠对聚苯硫醚(PPS)滤料进行表面活化预改性处理,采用浸渍-低温煅烧法、涂覆法和原位生成法制备低温脱硝协同脱汞复合功能滤料,在模拟烟气固定床系统中对比考察了活性组分摩尔比及反应温度对复合滤料双效催化性能的影响及机理。结果表明:在φ(O2)=5%、w(NO)=500×10^-6、w(NH3)=500×10^-6和过滤风速1 m/min条件下,原位生成法制得的PPS复合滤料(IS-N/PPS)表现出更加优异的的脱硝协同汞氧化性能;复合滤料双效催化性能随活性组分摩尔比及反应温度的升高均呈先增后降趋势,其中在摩尔比0.9和反应温度170℃下,IS-N/PPS的脱硝和汞氧化效率同时达到最高值,分别为89%和94.5%。The polyphenylene sulfide(PPS) filter material was firstly modified by sodium dodecyl sulfate(SDS) to activate the surface of the PPS, which was then treated using impregnation-low temperature calcination(IC) method, coating(CO) method and in-situ(IS) method for simultaneous denitrification and mercury oxidation, while the influences of load capacity and reaction temperature on the simultaneous NO reduction and Hg0 oxidation of the catalysts were investigated in a fixed bed system. Results show that IS-N/PPS exhibits a superior denitrification and mercury oxidation performance under φ(O2)=5%, w(NO)=500×10^-6, w(NH3)=500×10^-6, and filtration rate = 1.0 m/min. Both the NO and Hg0 conversion by catalytic PPS material increase first and then decrease with the rise of load capacity and reaction temperature, and the denitrification and mercury oxidation efficiency by IS-N/PPS could achieve their highest values at the same time, i.e. 89% and 94.5%, respectively, at the mole ratio of active component of 0.9 and the reaction temperature of 170 ℃.

关 键 词：浸渍-低温煅烧法 涂覆法 原位生成法 脱硝 脱汞 

分 类 号：X701[环境科学与工程—环境工程]