Titlebar

Export bibliographic data
Literature by the same author
plus on the publication server
plus at Google Scholar

 

Particulate filter substrates with SCR-functionality manufactured by co-extrusion of ceramic substrate and SCR active material

Title data

Schütt, Mathias ; Gallinger, Martin ; Moos, Ralf:
Particulate filter substrates with SCR-functionality manufactured by co-extrusion of ceramic substrate and SCR active material.
2015
Event: CAPOC10 : 10th International Congress on Catalysis and Automotive Pollution Control , 28.-30.10.2015 , Brussels, Belgien.
(Conference item: Conference , Poster )

Abstract in another language

An alternative method to integrate the SCR functionality in diesel particulate filters has been investigated. In contrast to coated filters, SCR active materials like Cu-SAPO and acidic CeO₂/ZrO₂ were added directly to the slip and were coextruded with silicon carbide matrix and silicon dioxide glass; the latter serving to bond the SCR active material with the matrix. Due to silicon dioxide glass addition, the extruded honeycomb samples can be hardened at 900 °C. Preliminary investigations proved the stability of the SCR active material at this temperature range. In this work, parameters like slip composition, grain size of the powders and hardening conditions were varied. Measured differential pressures indicated that the manufactured samples have open pores with porosities between 41% and 54%, making them suitable for particulate filter application. The porosity was controlled by varying the grain sizes of the powder materials as well by the hardening conditions like temperature and time. Initially, the silicon dioxide glass enclosed the SCR active materials and reduced BET surface area, yielding in poor NOx-conversion. By an improved two-step slip preparation method, the BET surface area and the NOx-conversion was increased. A NOx-conversion of about 70% at a feed ratio of 1.5 was achieved at 300 °C in simulated exhaust. We consider this approach worth for being further investigated and improved.

Further data

Item Type: Conference item (Poster)
Refereed: Yes
Additional notes: Session Noₓ Control - P003
Institutions of the University: Faculties > Faculty of Engineering Science
Faculties > Faculty of Engineering Science > Chair Functional Materials > Chair Functional Materials - Univ.-Prof. Dr.-Ing. Ralf Moos
Profile Fields > Advanced Fields > Advanced Materials
Research Institutions > Research Centres > Bayreuth Center for Material Science and Engineering - BayMAT
Research Institutions > Research Units > ZET - Zentrum für Energietechnik
Research Institutions > Research Units > BERC - Bayreuth Engine Research Center
Faculties
Faculties > Faculty of Engineering Science > Chair Functional Materials
Profile Fields
Profile Fields > Advanced Fields
Research Institutions
Research Institutions > Research Centres
Research Institutions > Research Units
Result of work at the UBT: Yes
DDC Subjects: 600 Technology, medicine, applied sciences > 620 Engineering
Date Deposited: 22 Dec 2015 08:28
Last Modified: 18 Apr 2016 07:50
URI: https://eref.uni-bayreuth.de/id/eprint/28997