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 13-22

Driving Forces

Sustainable development

Areas of Advance

Nanoscience and Nanotechnology (2010-2017)

Transport

Energy

Materials Science

Roots

Basic sciences

Subject Categories

Chemical Sciences

DOI

10.1016/j.molcata.2005.12.033

More information

Latest update

11/5/2018