Mechanistic Aspects of HC-SCR over HZSM-5 - Hydrocarbon Activation and Role of Carbon-Nitrogen Intermediates
Journal article, 2006

This study focuses on the mechanism of lean NO 2 reduction by hydrocarbons (propane, propene, and isobutane) over HZSM-5. In-situ FTIR measurements indicate a close correlation between formation of isocyanate species, consumption of water (formed in the reaction), and formation of amine species. The results in this investigation confirm our previously suggested reaction mechanism, which involves reaction of NO + species and hydrocarbon-derived species over Br√łnsted acid sites, forming isocyanate species. These species are hydrolyzed by water, forming amine species and, finally, N 2 . Experiments with 18 O 2 show an enhanced oxidation of propane by oxygen, in the presence of NO 2 . This effect can possibly be explained by a type of reaction mechanism where gas-phase and/or loosely bound NO 2 react with the adsorbed hydrocarbon-derived species (i.e., carbenium ion adsorbates and/or alkenes), which then more easily react with oxygen. ¬© 2006 American Chemical Society.

Author

Hanna Härelind Ingelsten

Competence Centre for Catalysis (KCK)

Chalmers, Chemical and Biological Engineering, Applied Surface Chemistry

Anders Palmqvist

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)

Journal of Physical Chemistry B

1520-6106 (ISSN) 1520-5207 (eISSN)

Vol. 110 37 18392-18400

Driving Forces

Sustainable development

Areas of Advance

Nanoscience and Nanotechnology (2010-2017)

Transport

Energy

Materials Science

Subject Categories

Manufacturing, Surface and Joining Technology

DOI

10.1021/jp063683z

More information

Latest update

11/5/2018