Unsteady-state operation of supported platinum catalysts for high conversion of methane
Journal article, 2016

Total oxidation of methane over model monolith catalysts with platinum sup- ported on alumina, alumina-ceria and ceria has been studied under unsteady- state operation of the feed gas stoichiometry. The general activity for methane oxidation follows the order Pt/alumina < Pt/alumina-ceria < Pt/ceria. Thanks to high catalytic activity at the gas composition switches, increased cycling fre- quency between oxygen excess and oxygen free conditions increases the average methane conversion significantly from 11 to 58% for Pt/alumina and from 25 to 87% for Pt/alumina-ceria. The corresponding stationary methane conversion is 10 and 19%, respectively. The underlying reason for the enhanced catalytic activity is likely twofold namely that periods with detrimentally high coverage of either oxygen or carbon are shortened and that the transients induce a highly active (chemical) state of the catalyst, thus, facilitating high average conversion of methane.

Enhanced catalyst efficiency

Methane activation

Oxygen self-poisoning

Transient reactor operation

Author

Sheedeh Fouladvand

Chalmers, Chemistry and Chemical Engineering, Applied Chemistry, Applied Surface Chemistry

Competence Centre for Catalysis (KCK)

Magnus Skoglundh

Chalmers, Chemistry and Chemical Engineering, Applied Chemistry, Applied Surface Chemistry

Competence Centre for Catalysis (KCK)

Per-Anders Carlsson

Chalmers, Chemistry and Chemical Engineering, Applied Chemistry, Applied Surface Chemistry

Competence Centre for Catalysis (KCK)

Chemical Engineering Journal

1385-8947 (ISSN)

Vol. 292 321-325

Catalysts for demanding environments

Swedish Foundation for Strategic Research (SSF), 2009-07-01 -- 2013-06-30.

Driving Forces

Sustainable development

Areas of Advance

Nanoscience and Nanotechnology

Transport

Energy

Materials Science

Subject Categories

Chemical Process Engineering

Materials Chemistry

DOI

10.1016/j.cej.2016.02.033

More information

Latest update

10/27/2018