• Home
  • Contact
  • Login
  • Privacy
  • Imprint

Search

Journal of Ceramic Science and Technology

The Journal of Ceramic Science and Technology publishes original scientific articles on all topics of ceramic science and technology from all ceramic branches. The focus is on the scientific exploration of  the relationships between processing, microstructure and properties of sintered ceramic materials as well as on new processing routes for innovative ceramic materials. The papers may have either theoretical or experimental background. A high quality of publications will be guaranteed by a thorough double blind peer review process.

The Journal is published by Göller Verlag GmbH on behalf of the Deutsche Keramische Gesellschaft (DKG). Edited by Yu-Ping Zeng, Shanghai Institute of Ceramics, Chinese Academy of Sciences, China.

  • Home
  • Early view
  • Articles
    • All articles
    • Recent Articles
    • Early Views
  • Issues
  • Submit an article
  • Guidelines for Referees
  • Guidelines for Authors
  • Open Access
  • Editorial Board
  • Copyright
  • Contact
  • Order journal / article
  • Customer area
  • Terms of Service

Journal Metrics

Web of science
Impact Factor: 1,220
Impact Factor without Journal Self Cites: 1,060
5 Year Impact Factor: 0,818

Scopus
Scimago Journal Rank (SJR):  0,378

 

Prices

Authors
1,300 € Open Access

Print Subscription
62 € per year

view all subscriptions

 

Payment methods

 Credit card

 Invoice

 Wire transfer

 

Articles

All articles  |  Recent articles

Optimisation of a Urea Selective Catalytic Reduction System with a Coated Ceramic Mixing Element

M.A. Damm1, M. Sauerborn1, T. Fend2, U. Herrmann1

1 Solar-Institut Jülich (SIJ), FH Aachen University of Applied Sciences
2 Institute for Solar Research, Facilities and Solar Materials

received August 1, 2016, received in revised form October 3, 2016, accepted November 4, 2016

Vol. 8, No. 1, Pages 19-24   DOI: 10.4416/JCST2016-00056

Abstract

The selective catalytic reduction of NOx emissions to H2O and N2 is a major technology in automotive applications for exhaust gas aftertreatment. In this process, the reactant ammonia (NH3) is produced by injecting AdBlue®. With the help of an SCR catalyst, this NH3 reduces emitted NOx to non-toxic nitrogen (N2) and water (H2O). For the homogenization and evaporation of the urea solution, usually metallic mixing elements are used. The new approach uses a mixing element based on structured porous ceramic with an enlarged surface and a special catalytic coating. The Solar-Institut Jülich and the German Aerospace Centre have developed a manufacturing process to modify and optimise the structure of basic polyurethane foams to achieve a high NH3 conversion rate in combination with adjustable backpressure. The optimised flow dynamics of the exhaust gas and the additional special catalytic coating lead to a high-performance mixing element. As a consequence, the size of the conventional SCR catalyst, which is located downstream of the mixer, can be reduced. This leads to cost-efficient and compact exhaust gas aftertreatment. In this paper the experimental results of the performance analysis of this newly designed porous-ceramic-coated mixing element will be presented.

Download Full Article (PDF)

Keywords

Selective catalytic reduction system, selective catalytic reduction catalyst, mixing element, porous ceramic polyurethane foam

References

1 Jean, E., Michelin, J.: Improvement of the Compact Mixing Systems for Optimum SCR-Filter Integration on Passenger Cars, 23rd Aachen Colloquium Automobile and Engine Technology, Aachen, (2014).

2 Gehrlein, J., Lang, A., Palmer, G.: Optimization of SCR systems by integration of mixture elements, MTZ, [03], (2009).

3 De Rudder, K.: Tier 4 high efficiency SCR for agricultural applications, SAE 2012 – 01 – 1087, (2012).

4 Koebel, M., Elsner, Kleemann, M.: Urea-SCR: a promising technique to reduce NOx emissions from automotive diesel engines, Catal. Today, 59, [3 – 4], 335 – 345, (2000).

5 Zheng, G., Palmer, G., Salanta G., Kotrba, A.: Mixer development for urea SCR application, SAE, 2009 – 01 – 2879, (2009).

6 Zueco, S.C., Halbei, J., Neumann, F., Oesterle, J.J., Rudelt, J.: Urea SCR system in focus - new challenges in the development of exhaust systems, MTZ, [09], (2007).

7 Bunar, F., Schirmer, S., Hansen, K.F., Hartland, J.: High performance diesel NOx-aftertreatment concept for future worldwide requirements, 23rd Aachen Colloquium Automobile and Engine Technology, Aachen, (2014).

8 Dimopoulos, P., Bach, C., Vogt, U., Herrmann, K.: Ceramic foams as catalyst substrate: Pre-catalyst application homogenizing the exhaust flow upstream of aftertreatment devices, SAE Paper, 2007 – 24 – 0097, (2007).

9 Zygourakis, K.: Transient operation of monolithic catalytic converters: A two-dimensional reactor model and the effects of radially nonuniform flow distribution, Chem. Eng. Sci., 44, [9]. 2075 – 2086, (1989).

10 Binner, J.: Ceramic Foams, in: Scheffler, M. and Colombo, P. (Eds.): Cellular ceramics: structure, manufacturing, properties and applications, Wiley-VCH Verlag GmbH & Co. KgaA, Weinheim, (2005).

11 Schwartzwalder, K., Somers, A.V.: Method of Making Porous Ceramic Articles. U.S Patent Application, US 3090094 (1963).

12 Becker, M., Hoffschmidt, B., Meurer, J.: Gas exhaust system. World Intellectual Property Organization Patent Application, WO PCT/EP98/05022 (2001).

13 Becker, M., Hoffschmidt, B., Meurer, J.: Exhaust gas system. German Patent Application, DE19814585A1, (1999).

14 Hoffschmidt, B.: Porous member with penetrating channels for fluid flow there through and a method of producing the member. World Intellectual Property Organization Patent Application, WO PCT/EP98/05024 (2002).

15 Hoffschmidt, B., Vaessen, C., Holzheid, F., Gonsior, D.: Efficient SCR system using an innovative static mixer, TIBKAT, (2009).

16 Vedula, V.R., Green, D.J., Hellman, J.R.: Thermal shock resistance in ceramic foams, J. Am. Ceram. Soc., 82, [3], 649 – 656, (2005).

17 Fend, T., Pitz-Paal, R., Reutter, O.: Convective heat transfer investigations in porous materials, International Conference Porous Ceramic Materials, Brügge, (2005).

18 Fend, T.: Unpublished data from the Institute of Solar Research, German Aerospace Center (DLR), Germany, (2014).

Copyright

Göller Verlag GmbH

Special and Topcial Issues

Topical Issue, 3/2017
Guest Editors:
Waltraud M. Kriven and Gregor J. G. Gluth
Geopolymers

Special Issue, 1/2017
Guest Editor:
Alexander Michaelis
6th International Congress on Ceramics (ICC6)

Topical Issue, 2/2016
Guest Editor:
Christos Aneziris
Low carbon and carbon-free refractory approaches for advan-ced steel technologies; A challenge for refractory materials and systems.

Topcial Issue, 4/2015
Low Temperature Co-fired Ceramics - LTCC

Topcial Issue, 2/2015
Status of Additive Manufacturing with Ceramics

Topical Focus, 4/2014
Materials Processing Science with Lasers as Energy Sources

Topical Issue, 2/2014
Guest Editor:
Christos Aneziris
Low carbon and carbon-free refractory approaches for advanced steel technologies; A challenge for refractory materials and systems.

Special Issue, 2/2013
Guest Editor:
Alexander Michaelis
Ceramic Materials and Components for Energy and Environmental Applications

Topical Issue, 1/2013
Ceramic Processing Science with Lasers as Energy Sources

Printed version

jcst 2015 02 cover

Order journal subscription
 

© 2009-2017 Göller Verlag GmbH