Kinetic study of photo-SCR with NH3 over TiO2

被引：62
|
作者：
Teramura, K [1 ]
Tanaka, T [1 ]
Yamazoe, S [1 ]
Arakaki, K [1 ]
Funabiki, T [1 ]
机构：
[1] Kyoto Univ, Grad Sch Engn, Dept Mol Engn, Kyoto 6158510, Japan
来源：
APPLIED CATALYSIS B-ENVIRONMENTAL | 2004年 / 53卷 / 01期
关键词：
photo-SCR; Eley-Rideal mechanism; Lewis acid site;
D O I：
10.1016/j.apcatb.2004.05.005
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
83% of NO conversion and 96% of N-2 selectivity were achieved in the photo-SCR system over TiO2 photocatalyst. N-2 was evolved in the gas phase when NO was flowed over TiO2 pretreated by NH3 under photoirradiation. The photo-SCR reaction proceeds according to Eley-Rideal mechanism. NO in the gas phase attacks NH3 adsorbed on Lewis acid site. Strength and/or amount of the Lewis acid site related to NH3 adsorption had an influence on the N-2 evolution. Therefore, the surface acid property of TiO2 is an important factor to control the N-2 evolution. In addition, the reaction orders of gases (NO, NH3 and O-2) and light intensity were determined by the kinetic studies. The results supported the reaction mechanism which we have proposed in the previous works. Time-determining step of the photo-SCR over TiO2 is the process of decomposition of a NH2NO intermediate under excess O-2 concentration or re-oxidation of Ti3+ to Ti4+ below 2% O-2 concentration. (C) 2004 Elsevier B.V. All rights reserved.
引用
收藏
页码：29 / 36
页数：8
相关论文
共 50 条
  • [31] Activities of CeO2/TiO2 catalyst for SCR of NO with NH3 at low temperature according to operating conditions
    Min-Chul Shin
    Jin-Sun Cha
    Byeongkil Shin
    Ho Hwan Chun
    Heesoo Lee
    Electronic Materials Letters, 2013, 9 : 71 - 76
  • [32] Activities of CeO2/TiO2 Catalyst for SCR of NO with NH3 at Low Temperature According to Operating Conditions
    Shin, Min-Chul
    Cha, Jin-Sun
    Shin, Byeongkil
    Chun, Ho Hwan
    Lee, Heesoo
    ELECTRONIC MATERIALS LETTERS, 2013, 9 (01) : 71 - 76
  • [33] Role of WO3 in NO Reduction with NH3 over V2O5-WO3/TiO2: A New Insight from the Kinetic Study
    Xin Xiao
    Shangchao Xiong
    Bo Li
    Yang Geng
    Shijian Yang
    Catalysis Letters, 2016, 146 : 2242 - 2251
  • [34] Surface characterization studies of TiO2 supported manganese oxide catalysts for low temperature SCR of NO with NH3
    Ettireddy, Padmanabha Reddy
    Ettireddy, Neeraja
    Mamedov, Sergey
    Boolchand, Punit
    Smirniotis, Panagiotis G.
    APPLIED CATALYSIS B-ENVIRONMENTAL, 2007, 76 (1-2) : 123 - 134
  • [35] Role of WO3 in NO Reduction with NH3 over V2O5-WO3/TiO2: A New Insight from the Kinetic Study
    Xiao, Xin
    Xiong, Shangchao
    Li, Bo
    Geng, Yang
    Yang, Shijian
    CATALYSIS LETTERS, 2016, 146 (11) : 2242 - 2251
  • [36] Performance and kinetic study on selective catalytic reduction of NOx with NH3 of MnOx-WO3/TiO2 catalyst
    Wu, Bijun
    Xiao, Ping
    Liu, Xiaoqin
    Huagong Xuebao/CIESC Journal, 2011, 62 (04): : 940 - 946
  • [37] The shape effect of TiO2 in VOx/TiO2 catalysts for selective reduction of NO by NH3
    Shi, Quanquan
    Li, Yong
    Zhou, Yan
    Miao, Shu
    Ta, Na
    Zhan, Ensheng
    Liu, Jingyue
    Shen, Wenjie
    JOURNAL OF MATERIALS CHEMISTRY A, 2015, 3 (27) : 14409 - 14415
  • [38] Quartz resonator with thin TiO2 for NH3 detection
    Georgieva, V
    Stevchev, P
    Vitanov, P
    Spassov, L
    VACUUM, 2004, 76 (2-3) : 203 - 206
  • [39] Effect of H2O and SO2 on the Selective Catalytic Reduction of NO with NH3 Over Ce/TiO2 Catalyst: Mechanism and Kinetic Study
    Xiao, Xin
    Xiong, Shangchao
    Shi, Yijie
    Shan, Wenpo
    Yang, Shijian
    JOURNAL OF PHYSICAL CHEMISTRY C, 2016, 120 (02): : 1066 - 1076
  • [40] Experimental and DFT study of the adsorption and activation of NH3 and NO on Mn-based spinels supported on TiO2 catalysts for SCR of NOx
    Fang, De
    Li, Da
    He, Feng
    Xie, Junlin
    Xiong, Chaochao
    Chen, Yuanlei
    COMPUTATIONAL MATERIALS SCIENCE, 2019, 160 : 374 - 381
12345