A combination of Ag/alumina and Ag modified ZSM-5 to remove NOx and CO during lean conditions

P. Konova; K. Arve; F. Klingstedt; P. Nikolov; A. Naydenov; N. Kumar; D. Yu. Murzin

doi:10.1016/j.apcatb.2005.10.042

A combination of Ag/alumina and Ag modified ZSM-5 to remove NO_x and CO during lean conditions

P. Konova^*
, K. Arve
, F. Klingstedt
, P. Nikolov
, A. Naydenov
, N. Kumar
, D. Yu. Murzin

^*Korresponderande författare för detta arbete

Forskningsoutput: Tidskriftsbidrag › Artikel › Vetenskaplig › Peer review

26 Citeringar (Scopus)

Sammanfattning

Single and bi-metallic silver modified ZSM-5 catalysts were synthesized using different methods of preparation, characterized by several techniques and tested in simulated diesel conditions. Additionally the catalytic behaviour of the most active catalyst, containing 5 wt.% Ag and prepared by impregnation (5Ag(Imp)-H-ZSM-5), was studied over a broad temperature range with two reducing agents (octane and propene). To correlate the catalytic activity of the prepared catalysts with preparation parameters the materials were characterized by XRD, SEM, N₂-physisorption, octane/propene-TPD, EPR and ICP techniques. A dual bed system consisting of Ag/alumina and the most active zeolitic material (5Ag(Imp)-H-ZSM-5) was shown not only to substantially enhance the activity of Ag/alumina in the low temperature region, but also to completely oxidize the CO and unburned hydrocarbons.

Originalspråk	Engelska
Sidor (från-till)	138-145
Antal sidor	8
Tidskrift	Applied Catalysis B: Environmental
Volym	70
Nummer	1-4
DOI	https://doi.org/10.1016/j.apcatb.2005.10.042
Status	Publicerad - 31 jan. 2007
MoE-publikationstyp	A1 Tidskriftsartikel-refererad

Finansiering

Petya M. Konova gratefully acknowledges the European Commission for the financial support within the framework of the International Marie-Curie Fellowship and is also thankful to Dr. R. Stoyanova from IGIC, BAS for providing the EPR data. The part of the work done in Åbo is part of the activities at the Åbo Akademi Process Chemistry Centre within the Finnish Centre of Excellence Programme (2000–2005) by the Academy of Finland. The financial support from Graduate School of Materials Research is gratefully acknowledged by K. Arve.

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title = "A combination of Ag/alumina and Ag modified ZSM-5 to remove NOx and CO during lean conditions",

abstract = "Single and bi-metallic silver modified ZSM-5 catalysts were synthesized using different methods of preparation, characterized by several techniques and tested in simulated diesel conditions. Additionally the catalytic behaviour of the most active catalyst, containing 5 wt.\% Ag and prepared by impregnation (5Ag(Imp)-H-ZSM-5), was studied over a broad temperature range with two reducing agents (octane and propene). To correlate the catalytic activity of the prepared catalysts with preparation parameters the materials were characterized by XRD, SEM, N2-physisorption, octane/propene-TPD, EPR and ICP techniques. A dual bed system consisting of Ag/alumina and the most active zeolitic material (5Ag(Imp)-H-ZSM-5) was shown not only to substantially enhance the activity of Ag/alumina in the low temperature region, but also to completely oxidize the CO and unburned hydrocarbons.",

keywords = "Ag/alumina, Ag/ZSM-5, Dual bed, HC-SCR, NO emissions",

author = "P. Konova and K. Arve and F. Klingstedt and P. Nikolov and A. Naydenov and N. Kumar and Murzin, \{D. Yu.\}",

note = "Funding Information: Petya M. Konova gratefully acknowledges the European Commission for the financial support within the framework of the International Marie-Curie Fellowship and is also thankful to Dr. R. Stoyanova from IGIC, BAS for providing the EPR data. The part of the work done in {\AA}bo is part of the activities at the {\AA}bo Akademi Process Chemistry Centre within the Finnish Centre of Excellence Programme (2000–2005) by the Academy of Finland. The financial support from Graduate School of Materials Research is gratefully acknowledged by K. Arve. Copyright: Copyright 2008 Elsevier B.V., All rights reserved.",

year = "2007",

month = jan,

day = "31",

doi = "10.1016/j.apcatb.2005.10.042",

language = "English",

volume = "70",

pages = "138--145",

journal = "Applied Catalysis B: Environmental",

issn = "0926-3373",

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T1 - A combination of Ag/alumina and Ag modified ZSM-5 to remove NOx and CO during lean conditions

AU - Konova, P.

AU - Arve, K.

AU - Klingstedt, F.

AU - Nikolov, P.

AU - Naydenov, A.

AU - Kumar, N.

AU - Murzin, D. Yu.

N1 - Funding Information: Petya M. Konova gratefully acknowledges the European Commission for the financial support within the framework of the International Marie-Curie Fellowship and is also thankful to Dr. R. Stoyanova from IGIC, BAS for providing the EPR data. The part of the work done in Åbo is part of the activities at the Åbo Akademi Process Chemistry Centre within the Finnish Centre of Excellence Programme (2000–2005) by the Academy of Finland. The financial support from Graduate School of Materials Research is gratefully acknowledged by K. Arve. Copyright: Copyright 2008 Elsevier B.V., All rights reserved.

PY - 2007/1/31

Y1 - 2007/1/31

N2 - Single and bi-metallic silver modified ZSM-5 catalysts were synthesized using different methods of preparation, characterized by several techniques and tested in simulated diesel conditions. Additionally the catalytic behaviour of the most active catalyst, containing 5 wt.% Ag and prepared by impregnation (5Ag(Imp)-H-ZSM-5), was studied over a broad temperature range with two reducing agents (octane and propene). To correlate the catalytic activity of the prepared catalysts with preparation parameters the materials were characterized by XRD, SEM, N2-physisorption, octane/propene-TPD, EPR and ICP techniques. A dual bed system consisting of Ag/alumina and the most active zeolitic material (5Ag(Imp)-H-ZSM-5) was shown not only to substantially enhance the activity of Ag/alumina in the low temperature region, but also to completely oxidize the CO and unburned hydrocarbons.

AB - Single and bi-metallic silver modified ZSM-5 catalysts were synthesized using different methods of preparation, characterized by several techniques and tested in simulated diesel conditions. Additionally the catalytic behaviour of the most active catalyst, containing 5 wt.% Ag and prepared by impregnation (5Ag(Imp)-H-ZSM-5), was studied over a broad temperature range with two reducing agents (octane and propene). To correlate the catalytic activity of the prepared catalysts with preparation parameters the materials were characterized by XRD, SEM, N2-physisorption, octane/propene-TPD, EPR and ICP techniques. A dual bed system consisting of Ag/alumina and the most active zeolitic material (5Ag(Imp)-H-ZSM-5) was shown not only to substantially enhance the activity of Ag/alumina in the low temperature region, but also to completely oxidize the CO and unburned hydrocarbons.

KW - Ag/alumina

KW - Ag/ZSM-5

KW - Dual bed

KW - HC-SCR

KW - NO emissions

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