Chinese Journal of Catalysis ›› 2016, Vol. 37 ›› Issue (11): 2018-2024.DOI: 10.1016/S1872-2067(16)62533-0

• Article • Previous Articles     Next Articles

NO reduction by CO over TiO2-γ-Al2O3 supported In/Ag catalyst under lean burn conditions

Shuang Wua,b, Xuebing Lic, Xiangchen Fangd, Yuanyuan Sunc, Jing Sunb, Mingdong Zhoub, Shuliang Zanga,b   

  1. a Department of Chemistry, East China Normal University, Shanghai 200062, China;
    b School of Chemistry and Materials Science, Liaoning Shihua University, Fushun 113001, Liaoning, China;
    c Key Laboratory of Biofuels, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao 266101, Shandong, China;
    d Fushun Research Institute of Petroleum and Petrochemicals, Sinopec Group, Fushun 113001, Liaoning, China
  • Received:2016-07-14 Revised:2016-08-18 Online:2016-11-25 Published:2016-11-25
  • Contact: Shuliang Zang,Tel:+86-24-56863837; E-mail:slzang@lnpu.edu.cn;Mingdong Zhou,Tel:+86-24-56860770; E-mail:mingdong.zhou@lnpu.edu.cn
  • Supported by:

    This work was supported by the National Science & Technology Pillar Program (2012BAF03B02), National Natural Science Foundation of China (21101085, U1162203), Natural Science Foundation of Liaoning Province (2015020196), Doctoral Fund of Shandong Province (BS2015HZ003), Fushun Science & Technology Program (FSKJHT 201423), and Liaoning Excellent Talents Program in University (LJQ2012031).

Abstract:

TiO2/γ-Al2O3 supported In/Ag catalysts were prepared by impregnation method, and investigated for NO reduction with CO as the reducing agent under lean burn conditions. The microscopic struc-ture and surface properties of the catalysts were studied by N2 adsorption-desorption, X-ray diffrac-tion, transmission electron microscopy, X-ray photoelectron spectroscopy, ultraviolet-visible spec-troscopy, H2 temperature-programmed reduction and Fourier transform infrared spectroscopy. TiO2/γ-Al2O3 supported In/Ag is a good catalyst for the reduction of NO to N2. It displayed high dis-persion, large amounts of surface active components and high NO adsorption capacity, which gave good catalytic performance and stability for the reduction of NO with CO under lean burn condi-tions. The silver species stabilized and improved the dispersion of the indium species. The introduc-tion of TiO2 into the γ-Al2O3 support promoted NO adsorption and improved the dispersion of the indium species and silver species.

Key words: Nitrogen oxide reduction with carbon monoxide, Lean burn condition, Indium/silver bimetallic catalyst, Removal of nitrogen oxides