OMS-2 molecular sieves doped with ceria for the development of new emission control catalyst

Research output: Contribution to conferenceAbstract

Abstract

Manganese oxide octahedral molecular sieves (OMS) are microporous, inorganic nanostructures. Manganese oxides with cryptomelane type structures (OMS-2), has a one-dimensional tunnel structure composed of edge shared MnO6 octahedra that form a 2 x 2 arrangement. [1] OMS-2 materials are hydrophobic and hence have improved hydrolytic stability under oxidation conditions. The mixed valency in OMS-2 contributes to its highly active and selective catalysis. [2] Functionality of OMS-2 can be further extended by structural incorporation of various dopants. In this work we have synthesized a range of OMS-2 based supports doped with Ce, CeZr and Pt for emission control. Materials often used for emission control applications are precious metals supported on a Ceria Zirconia mixed oxide [3-5]. Currently, one of the main challenges is to provide a catalyst which is active at low temperature, due to the high emissions of combustion engines during cold start cycles [6]. In particular, we have investigated the use of these OMS-2 hybrid catalyst supports for their activity in the oxidation reactions of CO, C3H6 and CH4 and compared with a commercial diesel oxidation catalyst. The new catalyst samples were tested under representing those in the catalytic filter of a light duty diesel vehicle. The effect of doping the OMS-2 support with Ceria and Zirconia have been studied both pre and post loading with 1wt% Pt.
Original languageEnglish
Publication statusPublished - 09 Jan 2019
EventUKCC 2019 - UK catalysis Conference: UKCC 2019 - UK catalysis Conference - Holywell Park, Loughborough, Loughborough, United Kingdom
Duration: 09 Jan 201911 Jan 2019
http://events.manchester.ac.uk/event/event:e4y-jhjab6we-q9k8yc/uk-catalysis-conference-2019

Conference

ConferenceUKCC 2019 - UK catalysis Conference
CountryUnited Kingdom
CityLoughborough
Period09/01/201911/01/2019
Internet address

Bibliographical note

Oral communication

Keywords

  • OMS-2
  • emission Control
  • NOx

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