SCR of Nitric Oxide by Hydrogen over Pd and Ir Based Catalysts with Different Supports

Chengyang Yin; Lifeng Wang; Sandrine Rivillon; Arthur J. Shih; Ralph T. Yang

doi:10.1007/s10562-015-1560-1

SCR of Nitric Oxide by Hydrogen over Pd and Ir Based Catalysts with Different Supports

Chengyang Yin
, Lifeng Wang
, Sandrine Rivillon
, Arthur J. Shih
, Ralph T. Yang

Department of Chemical and Biological Engineering

University of Michigan, Ann Arbor
Air Products and Chemicals, Inc.

Research output: Contribution to journal › Article › peer-review

14 Scopus citations

Abstract

Selective catalytic reduction of NO_x with hydrogen (H₂-SCR) in excess oxygen over Pd and Ir based catalysts with various silica supports was studied. The Pd/V₂O₅TiO₂SBA-15 and Ir/SBA-15 catalysts showed the highest activities. The effects of noble metal, various silica supports, CO and SO₂ on H₂-SCR over these catalysts were also studied and compared, and possible underlying mechanisms discussed. A comparison of 1 % Ir-doped on silicas with a wide range of pore sizes showed that the peak temperature (where the NO conversion maximum was located) was directly related to the pore size: larger pores of the support resulted in higher peak temperatures. This result indicates that pore diffusion limitation played a role in determining the peak temperature. In addition, a non-noble metal catalyst, Nb₂O₅SiO₂, was found to have considerable activity. (Graph Presented).

Original language	English
Article number	1560
Pages (from-to)	1491-1499
Number of pages	9
Journal	Catalysis Letters
Volume	145
Issue number	7
DOIs	https://doi.org/10.1007/s10562-015-1560-1
State	Published - Jul 29 2015

Keywords

Carbon monoxide effect on H-SCR
H-SCR
NO reduction
Noble metal based catalysts
Silica supports

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10.1007/s10562-015-1560-1

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@article{cd254891e87346418dd32b74def508bf,

title = "SCR of Nitric Oxide by Hydrogen over Pd and Ir Based Catalysts with Different Supports",

abstract = "Selective catalytic reduction of NOx with hydrogen (H2-SCR) in excess oxygen over Pd and Ir based catalysts with various silica supports was studied. The Pd/V2O5TiO2SBA-15 and Ir/SBA-15 catalysts showed the highest activities. The effects of noble metal, various silica supports, CO and SO2 on H2-SCR over these catalysts were also studied and compared, and possible underlying mechanisms discussed. A comparison of 1 \% Ir-doped on silicas with a wide range of pore sizes showed that the peak temperature (where the NO conversion maximum was located) was directly related to the pore size: larger pores of the support resulted in higher peak temperatures. This result indicates that pore diffusion limitation played a role in determining the peak temperature. In addition, a non-noble metal catalyst, Nb2O5SiO2, was found to have considerable activity. (Graph Presented).",

keywords = "Carbon monoxide effect on H-SCR, H-SCR, NO reduction, Noble metal based catalysts, Silica supports",

author = "Chengyang Yin and Lifeng Wang and Sandrine Rivillon and Shih, \{Arthur J.\} and Yang, \{Ralph T.\}",

note = "Publisher Copyright: {\textcopyright} Springer Science+Business Media 2015",

year = "2015",

month = jul,

day = "29",

doi = "10.1007/s10562-015-1560-1",

language = "English",

volume = "145",

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journal = "Catalysis Letters",

issn = "1011-372X",

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T1 - SCR of Nitric Oxide by Hydrogen over Pd and Ir Based Catalysts with Different Supports

AU - Yin, Chengyang

AU - Wang, Lifeng

AU - Rivillon, Sandrine

AU - Shih, Arthur J.

AU - Yang, Ralph T.

N1 - Publisher Copyright: © Springer Science+Business Media 2015

PY - 2015/7/29

Y1 - 2015/7/29

N2 - Selective catalytic reduction of NOx with hydrogen (H2-SCR) in excess oxygen over Pd and Ir based catalysts with various silica supports was studied. The Pd/V2O5TiO2SBA-15 and Ir/SBA-15 catalysts showed the highest activities. The effects of noble metal, various silica supports, CO and SO2 on H2-SCR over these catalysts were also studied and compared, and possible underlying mechanisms discussed. A comparison of 1 % Ir-doped on silicas with a wide range of pore sizes showed that the peak temperature (where the NO conversion maximum was located) was directly related to the pore size: larger pores of the support resulted in higher peak temperatures. This result indicates that pore diffusion limitation played a role in determining the peak temperature. In addition, a non-noble metal catalyst, Nb2O5SiO2, was found to have considerable activity. (Graph Presented).

AB - Selective catalytic reduction of NOx with hydrogen (H2-SCR) in excess oxygen over Pd and Ir based catalysts with various silica supports was studied. The Pd/V2O5TiO2SBA-15 and Ir/SBA-15 catalysts showed the highest activities. The effects of noble metal, various silica supports, CO and SO2 on H2-SCR over these catalysts were also studied and compared, and possible underlying mechanisms discussed. A comparison of 1 % Ir-doped on silicas with a wide range of pore sizes showed that the peak temperature (where the NO conversion maximum was located) was directly related to the pore size: larger pores of the support resulted in higher peak temperatures. This result indicates that pore diffusion limitation played a role in determining the peak temperature. In addition, a non-noble metal catalyst, Nb2O5SiO2, was found to have considerable activity. (Graph Presented).

KW - Carbon monoxide effect on H-SCR

KW - H-SCR

KW - NO reduction

KW - Noble metal based catalysts

KW - Silica supports

UR - https://www.scopus.com/pages/publications/84945494521

U2 - 10.1007/s10562-015-1560-1

DO - 10.1007/s10562-015-1560-1

M3 - Article

AN - SCOPUS:84945494521

SN - 1011-372X

VL - 145

SP - 1491

EP - 1499

JO - Catalysis Letters

JF - Catalysis Letters

IS - 7

M1 - 1560

ER -

SCR of Nitric Oxide by Hydrogen over Pd and Ir Based Catalysts with Different Supports

Abstract

Keywords

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