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

^*Corresponding author for this work

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

25 Citations (Scopus)

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.

Original language	English
Pages (from-to)	138-145
Number of pages	8
Journal	Applied Catalysis B: Environmental
Volume	70
Issue number	1-4
DOIs	https://doi.org/10.1016/j.apcatb.2005.10.042
Publication status	Published - 31 Jan 2007
MoE publication type	A1 Journal article-refereed

Keywords

Ag/alumina
Ag/ZSM-5
Dual bed
HC-SCR
NO emissions

Access to Document

10.1016/j.apcatb.2005.10.042Licence: Publisher rights policy

Cite this

@article{aab2df28ffe84f98b1799178cffe235f,

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",

publisher = "Elsevier",

number = "1-4",

}

TY - JOUR

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

UR - http://www.scopus.com/inward/record.url?scp=33845682576&partnerID=8YFLogxK

U2 - 10.1016/j.apcatb.2005.10.042

DO - 10.1016/j.apcatb.2005.10.042

M3 - Article

AN - SCOPUS:33845682576

SN - 0926-3373

VL - 70

SP - 138

EP - 145

JO - Applied Catalysis B: Environmental

JF - Applied Catalysis B: Environmental

IS - 1-4

ER -

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

Abstract

Keywords

Access to Document

Other files and links

Fingerprint

Cite this