Ammonium Ion Enhanced V2O5-WO3/TiO2 Catalysts for Selective Catalytic Reduction with Ammonia

被引:8
作者
Lee, Min Seong [1 ,2 ]
Kim, Sun-, I [1 ]
Jeong, Bora [1 ]
Park, Jin-Woo [2 ,3 ]
Kim, Taehyo [1 ]
Lee, Jung Woo [2 ]
Kwon, Gibum [4 ]
Lee, Duck Hyun [1 ]
机构
[1] Korea Inst Ind Technol, Green Mat & Proc R&D Grp, Ulsan 44413, South Korea
[2] Pusan Natl Univ, Dept Mat Sci & Engn, Busan 46241, South Korea
[3] NANO Co Ltd, Sangju 37257, South Korea
[4] Univ Kansas, Dept Mech Engn, Lawrence, KS 66045 USA
关键词
selective catalytic reduction; V-based catalyst; NOX removal efficiency; silane; ammonium; NH3-SCR REACTION; SCR CATALYST; NOX; PERFORMANCE; NH3; MN-CE/TIO2; MECHANISM; OXIDE; NH4+;
D O I
10.3390/nano11102677
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Selective catalytic reduction (SCR) is the most efficient NOX removal technology, and the vanadium-based catalyst is mainly used in SCR technology. The vanadium-based catalyst showed higher NOX removal performance in the high-temperature range but catalytic efficiency decreased at lower temperatures, following exposure to SOX because of the generation of ammonium sulfate on the catalyst surface. To overcome these limitations, we coated an NH4+ layer on a vanadium-based catalyst. After silane coating the V2O5-WO3/TiO2 catalyst by vapor evaporation, the silanized catalyst was heat treated under NH3 gas. By decomposing the silane on the surface, an NH4+ layer was formed on the catalyst surface through a substitution reaction. We observed high NOX removal efficiency over a wide temperature range by coating an NH4+ layer on a vanadium-based catalyst. This layer shows high proton conductivity, which leads to the reduction of vanadium oxides and tungsten oxide; additionally, the NOX removal performance was improved over a wide temperature range. These findings provide a new mothed to develop SCR catalyst with high efficiency at a wide temperature range.
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页数:11
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共 33 条
  • [11] A Highly Effective MnNdOx Catalyst for the Selective Catalytic Reduction of NOx with NH3
    Guo, Rui-tang
    Sun, Peng
    Pan, Wei-guo
    Li, Ming-yuan
    Liu, Shu-ming
    Sun, Xiao
    Liu, Shuai-wei
    Liu, Jian
    [J]. INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH, 2017, 56 (44) : 12566 - 12577
  • [12] Hua Hu, 2015, Advanced Materials Research, V1102, P11, DOI 10.4028/www.scientific.net/AMR.1102.11
  • [13] The promotional role of Nd on Mn/TiO2 catalyst for the low-temperature NH3-SCR of NOx
    Huang, Jun
    Huang, He
    Jiang, Hongtao
    Liu, Licheng
    [J]. CATALYSIS TODAY, 2019, 332 : 49 - 58
  • [14] Characteristics of selective catalytic reduction (SCR) catalyst adding graphene-tungsten nanocomposite
    Jeong, Bora
    Ye, Bora
    Kim, Eok-Soo
    Kim, Hong-Dae
    [J]. CATALYSIS COMMUNICATIONS, 2017, 93 : 15 - 19
  • [15] Electrostatically Self-Assembled Nonconjugated Polyelectrolytes as an Ideal Interfacial Layer for Inverted Polymer Solar Cells
    Kang, Hongkyu
    Hong, Soonil
    Lee, Jongjin
    Lee, Kwanghee
    [J]. ADVANCED MATERIALS, 2012, 24 (22) : 3005 - 3009
  • [16] Effects of hydrothermal aging on NH3-SCR reaction over Cu/zeolites
    Kwak, Ja Hun
    Tran, Diana
    Burton, Sarah D.
    Szanyi, Janos
    Lee, Jong H.
    Peden, Charles H. F.
    [J]. JOURNAL OF CATALYSIS, 2012, 287 : 203 - 209
  • [17] A Perspective on the Selective Catalytic Reduction (SCR) of NO with NH3 by Supported V2O5-WO3/TiO2 Catalysts
    Lai, Jun-Kun
    Wachs, Israel E.
    [J]. ACS CATALYSIS, 2018, 8 (07): : 6537 - 6551
  • [18] Effect of Catalyst Crystallinity on V-Based Selective Catalytic Reduction with Ammonia
    Lee, Min Seong
    Kim, Sun-, I
    Lee, Myeung-jin
    Ye, Bora
    Kim, Taehyo
    Kim, Hong-Dae
    Lee, Jung Woo
    Lee, Duck Hyun
    [J]. NANOMATERIALS, 2021, 11 (06)
  • [19] Reduced graphene oxide supported V2O5-WO3-TiO2 catalysts for selective catalytic reduction of NOx
    Lee, Minwoo
    Ye, Bora
    Jeong, Bora
    Chun, Hye-yeon
    Lee, Duck Hyun
    Park, Sam-sik
    Lee, Heesoo
    Kim, Hong-Dae
    [J]. KOREAN JOURNAL OF CHEMICAL ENGINEERING, 2018, 35 (10) : 1988 - 1993
  • [20] Enhanced NOx removal efficiency for SCR catalyst of well-dispersed Mn-Ce nanoparticles on hexagonal boron nitride
    Lee, Myeung-jin
    Kim, Do-Hyun
    Lee, Minwoo
    Ye, Bora
    Jeong, Bora
    Lee, DuckHyun
    Kim, Hong-Dae
    Lee, Heesoo
    [J]. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH, 2019, 26 (36) : 36107 - 36116