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Catalysts Supported by Porous Ceramic Layers on Ceramic or Metallic Substrates

Published online by Cambridge University Press:  10 February 2011

John W. Geus  and
J. Van Giezen
John W. Geus
Affiliation:
Department of Inorganic Chemistry, Debye Institute, Utrecht University, The Netherlands
J. Van Giezen
Affiliation:
Department of Inorganic Chemistry, Debye Institute, Utrecht University, The Netherlands
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Abstract

After mentioning the need for integration of the catalyst and the catalytic reactor, it is argued that thin (thickness up to about 50 μm) porous layers applied on ceramic or metallic surfaces are presenting interesting possibilities for the development of new catalytic reactors. The first type of reactions that can benefit from the new reactors are liquid-phase reactions catalyzed by a solid. Especially the selectivity of the reactions can be significantly improved. The second type of reactions are gas-phase reactions with a large thermal effect. It is argued that the rate of transport of thermal energy can be greatly improved by using sintered metal bodies within the reactor coated with highly porous ceramic layers. Finally utilization of thin ceramic porous layers in separations combined with catalytic reactions is shortly dealt with.

A very efficient procedure for application of the porous ceramic layers is presented, viz., pyro-lysis of thin layer of silicone rubber or analogous compounds. Addition of, e.g., aluminum or titanium ions can be used to control the thermostability and the pore-size distribution of the layers resulting after combustion of the organic constituents.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 454: Symposium S – Advanced Catalytic Materials–1996 , 1996 , 147
Copyright
Copyright © Materials Research Society 1997

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References

REFERENCES

1. Mulder, A., van Looij, F., and Geus, J. W. “Catalyst or Membrane Precursor Systems, Catalyst or Membrane Systems, and Method of Preparing such Systems” International Patent Application WO 92/13673Google Scholar
2. van Looij, F., Mulder, A., Boon, A.Q.M., Schepens, J.F., and Geus, J.W. in “New Frontiers in Catalysis Proceedings of the 10th International Congress on Catalysis, Budapest, Hungary, 19 – 24 July, 1992” (Guczi, L. et al. eds.) Pag. 1377 – 1389Google Scholar