Catalytic and mechanistic study of lean NO2 reduction by isobutane and propane over HZSM-5.
Journal article, 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.
isobutane
reduction
HZSM-5
lean NOx
FTIR
propane
Author
Dongmei Zhao
Chalmers, Chemical and Biological Engineering, Environmental Inorganic Chemistry
Hanna Härelind Ingelsten
Competence Centre for Catalysis (KCK)
Chalmers, Chemical and Biological Engineering, Applied Surface Chemistry
Magnus Skoglundh
Chalmers, Chemical and Biological Engineering, Applied Surface Chemistry
Competence Centre for Catalysis (KCK)
Anders Palmqvist
Chalmers, Chemical and Biological Engineering, Applied Surface Chemistry
Competence Centre for Catalysis (KCK)
Journal of Molecular Catalysis A: Chemical
1381-1169 (ISSN)
Vol. 249 1-2 13-22Driving Forces
Sustainable development
Areas of Advance
Nanoscience and Nanotechnology
Transport
Energy
Materials Science
Roots
Basic sciences
Subject Categories
Chemical Sciences
DOI
10.1016/j.molcata.2005.12.033