Operando Spectroscopic Studies of Cu–SSZ-13 for NH3–SCR deNOx Investigates the Role of NH3 in Observed Cu(II) Reduction at High NO Conversions

Alex G. Greenaway; Ines Lezcano-Gonzalez; Miren Agote-Aran; Emma K. Gibson; Yaroslav Odarchenko; Andrew M. Beale

doi:10.1007/s11244-018-0888-3

Operando Spectroscopic Studies of Cu–SSZ-13 for NH₃–SCR deNOx Investigates the Role of NH₃ in Observed Cu(II) Reduction at High NO Conversions

Alex G. Greenaway^*
, Ines Lezcano-Gonzalez
, Miren Agote-Aran
, Emma K. Gibson
, Yaroslav Odarchenko
, Andrew M. Beale

^*Corresponding author for this work

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

Abstract

The small pore zeolite chabazite (SSZ-13) in the copper exchanged form is a very efficient material for the selective catalytic reduction by ammonia (NH₃) of nitrogen oxides (NOx) from the exhaust of lean burn engines, typically diesel powered vehicles. The full mechanism occurring during the NH₃–SCR process is currently debated with outstanding questions including the nature and role of the catalytically active sites. Time-resolved operando spectroscopic techniques have been used to provide new level of insights in to the mechanism of NH₃–SCR, to show that the origin of stable Cu(I) species under SCR conditions is potentially caused by an interaction between NH₃ and the Cu cations located in eight ring sites of the bulk of the zeolite and is independent of the NH₃–SCR of NOx occurring at Cu six ring sites within the zeolite.

Original language	English
Pages (from-to)	175-182
Number of pages	8
Journal	Topics in Catalysis
Volume	61
Issue number	3-4
DOIs	https://doi.org/10.1007/s11244-018-0888-3
Publication status	Published - 1 Apr 2018
Externally published	Yes

Keywords

Catalysis
Cu–SSZ-13
Operando
XANES
Zeolite

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10.1007/s11244-018-0888-3

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@article{552c90587d684e94a18e806b1e6b9a8e,

title = "Operando Spectroscopic Studies of Cu–SSZ-13 for NH3–SCR deNOx Investigates the Role of NH3 in Observed Cu(II) Reduction at High NO Conversions",

abstract = "The small pore zeolite chabazite (SSZ-13) in the copper exchanged form is a very efficient material for the selective catalytic reduction by ammonia (NH3) of nitrogen oxides (NOx) from the exhaust of lean burn engines, typically diesel powered vehicles. The full mechanism occurring during the NH3–SCR process is currently debated with outstanding questions including the nature and role of the catalytically active sites. Time-resolved operando spectroscopic techniques have been used to provide new level of insights in to the mechanism of NH3–SCR, to show that the origin of stable Cu(I) species under SCR conditions is potentially caused by an interaction between NH3 and the Cu cations located in eight ring sites of the bulk of the zeolite and is independent of the NH3–SCR of NOx occurring at Cu six ring sites within the zeolite.",

keywords = "Catalysis, Cu–SSZ-13, Operando, XANES, Zeolite",

author = "Greenaway, \{Alex G.\} and Ines Lezcano-Gonzalez and Miren Agote-Aran and Gibson, \{Emma K.\} and Yaroslav Odarchenko and Beale, \{Andrew M.\}",

note = "Publisher Copyright: {\textcopyright} 2018, The Author(s).",

year = "2018",

month = apr,

day = "1",

doi = "10.1007/s11244-018-0888-3",

language = "English",

volume = "61",

pages = "175--182",

journal = "Topics in Catalysis",

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TY - JOUR

T1 - Operando Spectroscopic Studies of Cu–SSZ-13 for NH3–SCR deNOx Investigates the Role of NH3 in Observed Cu(II) Reduction at High NO Conversions

AU - Greenaway, Alex G.

AU - Lezcano-Gonzalez, Ines

AU - Agote-Aran, Miren

AU - Gibson, Emma K.

AU - Odarchenko, Yaroslav

AU - Beale, Andrew M.

PY - 2018/4/1

Y1 - 2018/4/1

N2 - The small pore zeolite chabazite (SSZ-13) in the copper exchanged form is a very efficient material for the selective catalytic reduction by ammonia (NH3) of nitrogen oxides (NOx) from the exhaust of lean burn engines, typically diesel powered vehicles. The full mechanism occurring during the NH3–SCR process is currently debated with outstanding questions including the nature and role of the catalytically active sites. Time-resolved operando spectroscopic techniques have been used to provide new level of insights in to the mechanism of NH3–SCR, to show that the origin of stable Cu(I) species under SCR conditions is potentially caused by an interaction between NH3 and the Cu cations located in eight ring sites of the bulk of the zeolite and is independent of the NH3–SCR of NOx occurring at Cu six ring sites within the zeolite.

AB - The small pore zeolite chabazite (SSZ-13) in the copper exchanged form is a very efficient material for the selective catalytic reduction by ammonia (NH3) of nitrogen oxides (NOx) from the exhaust of lean burn engines, typically diesel powered vehicles. The full mechanism occurring during the NH3–SCR process is currently debated with outstanding questions including the nature and role of the catalytically active sites. Time-resolved operando spectroscopic techniques have been used to provide new level of insights in to the mechanism of NH3–SCR, to show that the origin of stable Cu(I) species under SCR conditions is potentially caused by an interaction between NH3 and the Cu cations located in eight ring sites of the bulk of the zeolite and is independent of the NH3–SCR of NOx occurring at Cu six ring sites within the zeolite.

KW - Catalysis

KW - Cu–SSZ-13

KW - Operando

KW - XANES

KW - Zeolite

UR - https://www.scopus.com/pages/publications/85040662977

U2 - 10.1007/s11244-018-0888-3

DO - 10.1007/s11244-018-0888-3

M3 - Article

AN - SCOPUS:85040662977

SN - 1022-5528

VL - 61

SP - 175

EP - 182

JO - Topics in Catalysis

JF - Topics in Catalysis

IS - 3-4

ER -

Operando Spectroscopic Studies of Cu–SSZ-13 for NH₃–SCR deNOx Investigates the Role of NH₃ in Observed Cu(II) Reduction at High NO Conversions

Abstract

Keywords

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