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2009 , Vol. 24 >Issue 3: 457 - 462

DOI: https://doi.org/10.3724/SP.J.1077.2009.00457

研究论文

Ti-Zr-V-O复合催化材料的制备及其选择性催化还原NO

  • 沈岳松 ,
  • 祝社民 ,
  • 丘 泰 ,
  • 沈树宝
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  • 南京工业大学 1. 材料科学与工程学院； 2. 生命科学与制药工程学院， 南京 210009

收稿日期: 2008-09-01

  修回日期: 2008-10-14

  网络出版日期: 2009-05-20

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Preparation of Ti-Zr-V-O Catalytic Composite Material and its Selective Catalytic Reduction of NO

  • SHEN Yue-Song ,
  • ZHU She-Min ,
  • QIU Tai ,
  • SHEN Shu-Bao
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  • 1. College of Material Science and Engineering, Nanjing University of Technology, Nanjing 210009, China; 2. College of Life Science and Pharmaccutical Engineering, Nanjing University of Technology, Nanjing 210009, China

Received date: 2008-09-01

  Revised date: 2008-10-14

  Online published: 2009-05-20

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摘要

采用溶胶凝胶法制备了Ti-Zr-V-O一体化脱硝复合催化材料，研究了锆掺杂对钛钒复合催化材料脱硝活性的影响，采用X 射线衍射（XRD）、扫描电镜（SEM）、能谱分析（EDS）、傅里叶红外光谱（FT-IR）及N2物理吸附（BET法）等测试手段，分别考察了锆掺杂对钛钒复合氧化物晶型、结晶形貌、组成、官能团结构及比表面积的影响. 实验结果表明，锆掺杂可以稳定锐钛矿晶型，细化晶粒、抑制晶体生长，改变催化剂的结晶形貌，增强固体酸性，从而优化Ti-Zr-V-O复合催化剂的催化性能. 在Ti-Zr-V-O/ATS 陶瓷颗粒整装催化剂存在下，以NH3为还原剂进行NO的选择性催化还原脱除，锆掺杂明显拓宽了催化活性温度窗口，往高温区偏移100℃；反应温度为300℃时，NO转化率提高了17.3%.

关键词： 钛锆钒复合催化材料; 溶胶凝胶; 锆掺杂; 脱硝

本文引用格式

沈岳松 , 祝社民 , 丘 泰 , 沈树宝 . Ti-Zr-V-O复合催化材料的制备及其选择性催化还原NO[J]. 无机材料学报, 2009 , 24(3) : 457 -462 . DOI: 10.3724/SP.J.1077.2009.00457

Abstract

A series of Ti-Zr-V-O catalytic composite materials were prepared by sol-gel method. Effect of doping zirconium on catalytic NOx activities of Ti-V-O composite catalysts was investigated, and effects of doping zirconium on crystal form, crystalline morphology, chemical composition, functional group structure and specific surface area of titanium-vanadium composite oxides were characterized by X-ray diffraction (XRD), Scanning electron microscope (SEM), Energy spectrum analysis (EDS), Fourier infrared spectrum (FT-IR) and N2 physical adsorption (BET method) respectively. The experimental results show that doping zirconium can inhibit anatase crystalline transformation, refine grain size, change the crystalline morphology and enhance the solid acidity of Ti-V-O composite catalysts. Consequently, the catalytic properties of Ti-Zr-V-O composite catalysts are improved. In the process of selective catalytic reduction of NO over Ti-Zr-V-O/ATS ceramics monolithic catalysts, using NH3 as reducing agent, doping zirconium widens the catalytic active zone to high temperature area about 100℃, and the highest NO conversion at 300℃ is increased by 17.3%.

Key words： Ti-Zr-V-O catalytic composite materials; sol-gel; doping zirconium; deNOx

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