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

Kompetenscentrum katalys

Magnus Skoglundh

Chalmers, Kemi och kemiteknik, Tillämpad kemi

Kompetenscentrum katalys

Per-Anders Carlsson

Chalmers, Kemi och kemiteknik, Tillämpad kemi

Kompetenscentrum katalys

Chemical Engineering Journal

1385-8947 (ISSN)

Vol. 292 321-325

Katalysatorer för krävande miljöer

Stiftelsen för Strategisk forskning (SSF) (RMA08-0085), 2009-07-01 -- 2013-06-30.

Drivkrafter

Hållbar utveckling

Styrkeområden

Nanovetenskap och nanoteknik (SO 2010-2017, EI 2018-)

Transport

Energi

Materialvetenskap

Ämneskategorier

Kemiska processer

Materialkemi

DOI

10.1016/j.cej.2016.02.033

Mer information

Senast uppdaterat

2018-10-27