Lifetime impact of SO2-poisoning of a Cu-CHA catalyst for NH3-SCR

Peter S. Hammershøi; Ton V.W. Janssens; Anker D. Jensen

Abstract

NO_x (NO+NO₂) emissions from diesel vehicles are reduced by selective catalytic reduction with NH₃ (NH₃-SCR) over V₂O₅- or metal-zeolite-based catalysts. Cu-CHA zeolites are particularly relevant due to their superior low-temperature activity [1]. However, the inevitable presence of SO₂ in diesel exhaust causes deactivation of Cu-CHA catalysts [1-3]. As the required lifetime of an SCR catalyst is ca. 10000 h, it is important to know how the activity of the catalyst develops with long-term SO₂ exposure, and if catalyst regeneration is an option. It has been shown that the deactivation by SO₂ is partially reversible [3]. In this contribution, we focus on the SO₂ uptake by the Cu-CHA catalyst, and how the reversible and irreversible deactivation are related to the amount of sulfur in the catalyst.

Original language	English
Publication date	2018
Number of pages	2
Publication status	Published - 2018
Event	The 10th International Conference on Environmental Catalysis, and The 3rd International Symposium on Catalytic Science and Technology in Sustainable Energy and Environment - Tianjin, China Duration: 21 Sept 2018 → 26 Sept 2018

Conference

Conference	The 10th International Conference on Environmental Catalysis, and The 3rd International Symposium on Catalytic Science and Technology in Sustainable Energy and Environment
Country/Territory	China
City	Tianjin
Period	21/09/2018 → 26/09/2018

Keywords

NH3-SCR
Cu-CHA
SO2 poisoning
Deactivation
Regeneration

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title = "Lifetime impact of SO2-poisoning of a Cu-CHA catalyst for NH3-SCR",

abstract = "NOx (NO+NO2) emissions from diesel vehicles are reduced by selective catalytic reduction with NH3 (NH3-SCR) over V2O5- or metal-zeolite-based catalysts. Cu-CHA zeolites are particularly relevant due to their superior low-temperature activity [1]. However, the inevitable presence of SO2 in diesel exhaust causes deactivation of Cu-CHA catalysts [1-3]. As the required lifetime of an SCR catalyst is ca. 10000 h, it is important to know how the activity of the catalyst develops with long-term SO2 exposure, and if catalyst regeneration is an option. It has been shown that the deactivation by SO2 is partially reversible [3]. In this contribution, we focus on the SO2 uptake by the Cu-CHA catalyst, and how the reversible and irreversible deactivation are related to the amount of sulfur in the catalyst. ",

keywords = "NH3-SCR, Cu-CHA, SO2 poisoning, Deactivation, Regeneration",

author = "Hammersh{\o}i, {Peter S.} and Janssens, {Ton V.W.} and Jensen, {Anker D.}",

year = "2018",

language = "English",

note = "The 10th International Conference on Environmental Catalysis, and The 3rd International Symposium on Catalytic Science and Technology in Sustainable Energy and Environment, ICEC, EECAT ; Conference date: 21-09-2018 Through 26-09-2018",

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Lifetime impact of SO₂-poisoning of a Cu-CHA catalyst for NH₃-SCR. / Hammershøi, Peter S.; Janssens, Ton V.W.; Jensen, Anker D.
2018. Abstract from The 10th International Conference on Environmental Catalysis, and The 3rd International Symposium on Catalytic Science and Technology in Sustainable Energy and Environment, Tianjin, China.

Research output: Contribution to conference › Conference abstract for conference › Research › peer-review

TY - ABST

T1 - Lifetime impact of SO2-poisoning of a Cu-CHA catalyst for NH3-SCR

AU - Hammershøi, Peter S.

AU - Janssens, Ton V.W.

AU - Jensen, Anker D.

PY - 2018

Y1 - 2018

N2 - NOx (NO+NO2) emissions from diesel vehicles are reduced by selective catalytic reduction with NH3 (NH3-SCR) over V2O5- or metal-zeolite-based catalysts. Cu-CHA zeolites are particularly relevant due to their superior low-temperature activity [1]. However, the inevitable presence of SO2 in diesel exhaust causes deactivation of Cu-CHA catalysts [1-3]. As the required lifetime of an SCR catalyst is ca. 10000 h, it is important to know how the activity of the catalyst develops with long-term SO2 exposure, and if catalyst regeneration is an option. It has been shown that the deactivation by SO2 is partially reversible [3]. In this contribution, we focus on the SO2 uptake by the Cu-CHA catalyst, and how the reversible and irreversible deactivation are related to the amount of sulfur in the catalyst.

AB - NOx (NO+NO2) emissions from diesel vehicles are reduced by selective catalytic reduction with NH3 (NH3-SCR) over V2O5- or metal-zeolite-based catalysts. Cu-CHA zeolites are particularly relevant due to their superior low-temperature activity [1]. However, the inevitable presence of SO2 in diesel exhaust causes deactivation of Cu-CHA catalysts [1-3]. As the required lifetime of an SCR catalyst is ca. 10000 h, it is important to know how the activity of the catalyst develops with long-term SO2 exposure, and if catalyst regeneration is an option. It has been shown that the deactivation by SO2 is partially reversible [3]. In this contribution, we focus on the SO2 uptake by the Cu-CHA catalyst, and how the reversible and irreversible deactivation are related to the amount of sulfur in the catalyst.

KW - NH3-SCR

KW - Cu-CHA

KW - SO2 poisoning

KW - Deactivation

KW - Regeneration

M3 - Conference abstract for conference

T2 - The 10th International Conference on Environmental Catalysis, and The 3rd International Symposium on Catalytic Science and Technology in Sustainable Energy and Environment

Y2 - 21 September 2018 through 26 September 2018

ER -