Catalytic and mechanistic study of lean NO2 reduction by isobutane and propane over HZSM-5.
Artikel i vetenskaplig tidskrift, 2006

saturated hydrocarbons, propane and isobutane, has been investigated over acidic zeolite HZSM-5. The activity for NO2 reduction and the selectivity for N-2 formation correlate well with the intracrystalline acidity (Bronsted acid sites) of the zeolite. Isobutane is a more efficient reducing agent than propane due to its tertiary hydrogen being more readily activated than the secondary hydrogen in propane. In situ DRIFT step-response experiments with NO2 and isobutane show formation of surface bound NO+, isocyanate, unsaturated hydrocarbons and amine species. The NO+ species seems to play an important role in the reduction of NO2 probably by reacting with alkenes formed from carbenium ion adsorbates. These species likely form isocyanates, amine species and finally nitrogen.

propane

isobutane

FTIR

reduction

lean NOx

HZSM-5

Författare

Dongmei Zhao

Chalmers, Kemi- och bioteknik, Oorganisk miljökemi

Hanna Härelind

Kompetenscentrum katalys (KCK)

Chalmers, Kemi- och bioteknik, Teknisk ytkemi

Magnus Skoglundh

Kompetenscentrum katalys (KCK)

Chalmers, Kemi- och bioteknik, Teknisk ytkemi

Anders Palmqvist

Chalmers, Kemi- och bioteknik, Teknisk ytkemi

Kompetenscentrum katalys (KCK)

Journal of Molecular Catalysis A: Chemical

1381-1169 (ISSN)

Vol. 249 13-22

Drivkrafter

Hållbar utveckling

Styrkeområden

Nanovetenskap och nanoteknik

Transport

Energi

Materialvetenskap

Fundament

Grundläggande vetenskaper

Ämneskategorier

Kemi

DOI

10.1016/j.molcata.2005.12.033