Reduction of nitric oxide by propene and propane on Ni-exchanged mordenite

B.I. Mosqueda Jimenez, A. Jentys, Kulathuiyer Seshan, J.A. Lercher

Research output: Contribution to journalArticleAcademicpeer-review

35 Citations (Scopus)

Abstract

The reduction of NO over Ni-exchanged mordenite in the presence of excess oxygen using propane and propene as reducing agents was studied. During ion exchange of the zeolite with Ni2+, Brønsted acid sites were formed resulting from the hydrolysis of divalent Ni2+ ions. The chemical state of the Ni ions and the density and strength of the acid sites strongly determine the activity and selectivity of the catalysts for the NO reduction. Non-reduced catalysts showed a high selectivity to N2, while after partial reduction of the Ni ions significant concentrations of NO2 and N2O were formed. In addition, low concentrations of NO2 were formed during reduction of NO with propane and related to the more demanding activation of the alkane. An optimum concentration of acid sites, which in turn depends on the nickel loading, is required to obtain high NO conversion with propane. Deactivation due to deposition of carbonaceous species was observed during the NO reduction with propene for samples with high concentration of acid sites.
Original languageUndefined
Pages (from-to)105-115
Number of pages11
JournalApplied catalysis B: environmental
Volume43
Issue number2
DOIs
Publication statusPublished - 2003

Keywords

  • Acidity
  • Hydrocarbon-SCR
  • Metal loading
  • IR-75013
  • Propene
  • Ni-exchanged zeolites
  • METIS-213881
  • Propane

Cite this

Mosqueda Jimenez, B.I. ; Jentys, A. ; Seshan, Kulathuiyer ; Lercher, J.A. / Reduction of nitric oxide by propene and propane on Ni-exchanged mordenite. In: Applied catalysis B: environmental. 2003 ; Vol. 43, No. 2. pp. 105-115.
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title = "Reduction of nitric oxide by propene and propane on Ni-exchanged mordenite",
abstract = "The reduction of NO over Ni-exchanged mordenite in the presence of excess oxygen using propane and propene as reducing agents was studied. During ion exchange of the zeolite with Ni2+, Br{\o}nsted acid sites were formed resulting from the hydrolysis of divalent Ni2+ ions. The chemical state of the Ni ions and the density and strength of the acid sites strongly determine the activity and selectivity of the catalysts for the NO reduction. Non-reduced catalysts showed a high selectivity to N2, while after partial reduction of the Ni ions significant concentrations of NO2 and N2O were formed. In addition, low concentrations of NO2 were formed during reduction of NO with propane and related to the more demanding activation of the alkane. An optimum concentration of acid sites, which in turn depends on the nickel loading, is required to obtain high NO conversion with propane. Deactivation due to deposition of carbonaceous species was observed during the NO reduction with propene for samples with high concentration of acid sites.",
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Reduction of nitric oxide by propene and propane on Ni-exchanged mordenite. / Mosqueda Jimenez, B.I.; Jentys, A.; Seshan, Kulathuiyer; Lercher, J.A.

In: Applied catalysis B: environmental, Vol. 43, No. 2, 2003, p. 105-115.

Research output: Contribution to journalArticleAcademicpeer-review

TY - JOUR

T1 - Reduction of nitric oxide by propene and propane on Ni-exchanged mordenite

AU - Mosqueda Jimenez, B.I.

AU - Jentys, A.

AU - Seshan, Kulathuiyer

AU - Lercher, J.A.

PY - 2003

Y1 - 2003

N2 - The reduction of NO over Ni-exchanged mordenite in the presence of excess oxygen using propane and propene as reducing agents was studied. During ion exchange of the zeolite with Ni2+, Brønsted acid sites were formed resulting from the hydrolysis of divalent Ni2+ ions. The chemical state of the Ni ions and the density and strength of the acid sites strongly determine the activity and selectivity of the catalysts for the NO reduction. Non-reduced catalysts showed a high selectivity to N2, while after partial reduction of the Ni ions significant concentrations of NO2 and N2O were formed. In addition, low concentrations of NO2 were formed during reduction of NO with propane and related to the more demanding activation of the alkane. An optimum concentration of acid sites, which in turn depends on the nickel loading, is required to obtain high NO conversion with propane. Deactivation due to deposition of carbonaceous species was observed during the NO reduction with propene for samples with high concentration of acid sites.

AB - The reduction of NO over Ni-exchanged mordenite in the presence of excess oxygen using propane and propene as reducing agents was studied. During ion exchange of the zeolite with Ni2+, Brønsted acid sites were formed resulting from the hydrolysis of divalent Ni2+ ions. The chemical state of the Ni ions and the density and strength of the acid sites strongly determine the activity and selectivity of the catalysts for the NO reduction. Non-reduced catalysts showed a high selectivity to N2, while after partial reduction of the Ni ions significant concentrations of NO2 and N2O were formed. In addition, low concentrations of NO2 were formed during reduction of NO with propane and related to the more demanding activation of the alkane. An optimum concentration of acid sites, which in turn depends on the nickel loading, is required to obtain high NO conversion with propane. Deactivation due to deposition of carbonaceous species was observed during the NO reduction with propene for samples with high concentration of acid sites.

KW - Acidity

KW - Hydrocarbon-SCR

KW - Metal loading

KW - IR-75013

KW - Propene

KW - Ni-exchanged zeolites

KW - METIS-213881

KW - Propane

U2 - 10.1016/S0926-3373(02)00280-1

DO - 10.1016/S0926-3373(02)00280-1

M3 - Article

VL - 43

SP - 105

EP - 115

JO - Applied catalysis B: environmental

JF - Applied catalysis B: environmental

SN - 0926-3373

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ER -