Periodic control for improved low-temperature catalytic activity
Journal article, 2001

The influence of transient changes in the gas composition on the low-temperature activity of a commercial three-way catalyst and a Pt/Al2O3 model catalyst has been studied. By introducing well-controlled periodic O2 pulses to simple gas mixtures of CO or C3H6 (in N2), a substantial improvement of the low temperature oxidation activity was observed for both catalysts. The reason for low activity at low temperatures is normally attributed to self-poisoning by CO or hydrocarbons. The improved catalytic performance observed here is suggested to origin from the transients causing a surface reactant composition that is favourable for the reaction rate.

self-poisoning

cold start emissions

low temperature activity

periodic pulsing

catalytic oxidation

platinum

carbon monoxide

transient changes

Author

Per-Anders Carlsson

Competence Centre for Catalysis (KCK)

Department of Chemical Reaction Engineering

Peter Thormählen

Competence Centre for Catalysis (KCK)

Department of Chemical Reaction Engineering

Magnus Skoglundh

Department of Applied Surface Chemistry

Competence Centre for Catalysis (KCK)

Hans Persson

Competence Centre for Catalysis (KCK)

Department of Physics

Erik Fridell

Competence Centre for Catalysis (KCK)

Chalmers, Applied Physics

Edward Jobson

Department of Chemical Reaction Engineering

Competence Centre for Catalysis (KCK)

Bengt Andersson

Department of Chemical Reaction Engineering

Competence Centre for Catalysis (KCK)

Topics in Catalysis

1022-5528 (ISSN) 1572-9028 (eISSN)

Vol. 16-17 1-4 343-347

Driving Forces

Sustainable development

Areas of Advance

Nanoscience and Nanotechnology (2010-2017)

Transport

Energy

Materials Science

Subject Categories

Physical Chemistry

Chemical Process Engineering

Chemical Engineering

More information

Created

10/7/2017