Ti-Si-O_x脱硝催化剂载体的组分优化及其性能研究  

Component optimization and performance of Ti-Si-O_xdeNO_x catalyst carrier

作　　者：刘青[1] 金奇杰[1,2] 眭国荣[1] 沈岳松[1,2] 祝社民[1,2] 丘泰[1,2] LIU QingI JIN Qijie SUI Guorong SHEN Yuesong ZHU Shemin QIU Tai(College of Materials Science and Engineering, Nanjing Tech University, Nanjing 210009, China Jiangsu Collaborative Innovation Center for Advanced Inorganic Function Composites, Nanjing Tech University, Nanjing 211816, China)

机构地区：[1]南京工业大学材料科学与工程学院,南京210009 [2]南京工业大学江苏先进无机功能复合材料协同创新中心,南京211816

出　　处：《环境工程学报》2017年第10期5495-5501,共7页Chinese Journal of Environmental Engineering

基　　金：国家重点研发计划(2016YFC0205500);国家自然科学基金资助项目(51772149);江苏高校优势学科建设工程项目资助(PAPD)

摘　　要：采用挤出成型法制备系列Ti-Si-O_x复合氧化物催化剂载体,研究了Ti-Si-O_x催化剂载体组分配比、酸量、比表面积与脱硝性能和抗压强度的关系。采用XRD、Raman spectra、N_2-BET、Py-IR以及XPS等表征技术对催化剂载体进行表征。结果表明:Ti/Si元素摩尔比为9∶1时Ti_(0.9)Si_(0.1)O_x催化剂载体的轴向抗压强度适中且脱硝催化活性最高;在5 000 h^(-1)空速条件下,催化剂载体最高脱硝活性在400℃时达到99.0%且起燃温度降至260℃;另外,Ti_(0.9)Si_(0.1)O_x催化剂载体的比表面积为75.4 m^2·g^(-1),介孔最可几分布为8.1 nm,轴向抗压强度为1.4 MPa,符合工业应用条件,即Ti-Si-O_x载体具有较好的工业应用前景。A series of Ti-Si-O_x catalyst carriers were prepared by extrusion method and tested for selective catalytic reduction（ SCR） of NO with NH_3.The influence of component proportion,specific surface area and total acid quantity of Ti-Si-O_x catalyst carriers on catalytic activity and compressive strength was investigated.These catalysts were characterized by XRD,N_2-BET,Py-IR and XPS respectively.Results showed that the catalyst carrier exhibited the highest catalytic performance and appropriate compressive strength when the Ti/Si molar ratio was equal to 9 ∶ 1.Under the GHSV of 5 000 h^-1,the Ti_（0.9）Si_（0.1）O_x obtained 99.0% NO conversion at 400 ℃and the light-off temperature decreased to 260 ℃.The specific surface area was 75.4 m^2·g^-1,the most probable meso pore distribution was 8.1 nm and the axial compressive strength was 1.4 MPa.In other words,the TiSi-O_x catalyst carrier had a good application prospect of industry.

关 键 词：Ti-Si-Ox催化剂载体 烟气脱硝 组分优化 性能研究 

分 类 号：X701.3[环境科学与工程—环境工程]