Microstructure stability of the PtRh alloys used for catalytic ammonia oxidation

• Autorzy: Rdzawski Z. M. , Stobrawa J. P. , Szynowski J.
• Języki publikacji: EN

Abstrakty

EN

Purpose: The aim of this work was to investigate the possibility of increasing performance of the PtRh alloys used in industrial processes of catalytic ammonia oxidation. Design/methodology/approach: In order to reach this objective, the extensive studies have been carried out, which were aimed at better understanding of the phenomena taking place on a surface and inside the wires of catalytic gauzes during the process. The electron microscopy methods (SEM, TEM, HRTEM), optical microscopy and microanalysis were used to examine the alloys under investigation. Findings: It was found that the performance and lifetime of the catalytic gauzes is closely related with structural stability of the alloys and with the stability of parameters of the ammonia oxidation process. Practical implications: The PtRh1O-based alloys modified with boron and yttrium have been developed, which are characterised by more stable structure than the classical PtRh1O alloy and enable significant reduction of the grain growth effect during the use of the gauzes. This should contribute to the improvement of the process efficiency and selectivity, and increase the lifetime of the catalytic gauzes. Originality/value: The developed alloys are new and original.

Słowa kluczowe

EN

metallic alloys; multifunctional materials; mechanical properties; microstructure

PL

stopy metaliczne; materiały wielofunkcyjne; materiały inteligentne; właściwości mechaniczne; mikrostruktura

• Wydawca: International OCSCO World Press
• Czasopismo: Journal of Achievements in Materials and Manufacturing Engineering
• Rocznik: 2007
• Tom: Vol. 24, nr 1
• Strony: 106--114
• Opis fizyczny: Bibliogr. 16 poz., fot., rys., tab.

Twórcy

autor

Rdzawski Z. M.

autor

Stobrawa J. P.

autor

Szynowski J.

• Division of Materials Processing Technology, Management and Computer Techniques in Materials Science, Institute of Engineering Materials and Biomaterials, Silesian University of Technology, ul. Konarskiego 18 a, 44-100 Gliwice, Poland,

Bibliografia

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