Influence of the reducing agent for lean NOx reduction over Cu-ZSM-5
Artikel i vetenskaplig tidskrift, 2011

A range of ethers, alcohols and alkanes were compared as reducing agents for NOx over a Cu-ZSM-5 lean NOx catalyst. The nature of the reducing agent was found to determine the degree of NOx reduction. Methanol and DME were virtually inactive as reductants over this catalyst, while higher ethers and alcohols showed high NOx conversion. A detailed study was performed to investigate the differences. Among the studied variables, the chemical structure of the reductant was found to be especially important. Despite having a lower reducing capacity than DME, ethylene glycol was active for NOx reduction. It is concluded that a C-C bond in the reducing agent is required for lean NOx reduction over Cu-ZSM-5. The absence of this bond in DME and methanol explains their low activity for NOx reduction over this catalyst.

Alternative fuel

Reducing agent

Ether

Dimethyl

Zeolite

Cu-ZSM-5

Hydrocarbon-SCR

engine

selective catalytic-reduction

excess oxygen

nitrogen-oxides

Alcohol

dimethyl ether

ether

NOx reduction

exhaust-gas

zeolites

nitric-oxide

zsm-5 catalysts

exchanged

Alkane

promoted alumina catalysts

hydrocarbon specificity

Författare

Sara U Erkfeldt

Kompetenscentrum katalys (KCK)

Chalmers, Kemi- och bioteknik, Teknisk ytkemi

Anders Palmqvist

Kompetenscentrum katalys (KCK)

Chalmers, Kemi- och bioteknik, Teknisk ytkemi

Martin Petersson

Volvo Group

Applied Catalysis B: Environmental

0926-3373 (ISSN) 1873-3883 (eISSN)

Vol. 102 3-4 547-554

Ämneskategorier

Kemi

DOI

10.1016/j.apcatb.2010.12.037

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Senast uppdaterat

2018-11-26