Unsteady-state operation of supported platinum catalysts for high conversion of methane
Artikel i vetenskaplig tidskrift, 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

Författare

Sheedeh Fouladvand

Chalmers, Kemi och kemiteknik, Tillämpad kemi, Teknisk ytkemi

Kompetenscentrum katalys (KCK)

Magnus Skoglundh

Chalmers, Kemi och kemiteknik, Tillämpad kemi, Teknisk ytkemi

Kompetenscentrum katalys (KCK)

Per-Anders Carlsson

Chalmers, Kemi och kemiteknik, Tillämpad kemi, Teknisk ytkemi

Kompetenscentrum katalys (KCK)

Chemical Engineering Journal

1385-8947 (ISSN)

Vol. 292 321-325

Katalysatorer för krävande miljöer

Stiftelsen för Strategisk forskning (SSF), 2009-07-01 -- 2013-06-30.

Drivkrafter

Hållbar utveckling

Styrkeområden

Nanovetenskap och nanoteknik

Transport

Energi

Materialvetenskap

Ämneskategorier

Kemiska processer

Materialkemi

DOI

10.1016/j.cej.2016.02.033

Mer information

Senast uppdaterat

2018-10-27