Application of Pt/Al2O3 catalysts produced by sol-gel process to uranyl ion reduction

• Autorzy: Deptuła A. , Łada W. , Olczak T. , Chmielewski A.
• Konferencja: Proceedings of the 2nd Polish-Japanese Workshop on Materials Science "Materials for Sustainable Development in the 21st Century" 12-15 October 2005, Warsaw, Poland
• Języki publikacji: EN

Abstrakty

EN

Various kinds of active alumina supports were obtained by the Institute of Nuclear Chemistry and Technology (INCT) sol-gel process in the following steps: (1) preparation of alumina sols by extraction of nitrates with Primene JMT from aluminium nitrate solution; (2) gelation to spherical particles (with diameter < 100 žm) by extraction of water from sol emulsion in 2-ethyl-1-hexanol; (3) sometimes conversion of NO3 - stabilized gel to OH- form by reaction with ammonia; (4) calcination of gels to ?-Al2O3 with specific surface area > 100 m2/g at 500°C. The powders were then impregnated with chloroplatinic acid and recalcined at 500°C. Catalysts were also prepared by direct gelation of alumina sol containing hydroplatinic acid followed by steps (3) and (4). Pt/Al2O3 catalysts were used for the reduction of 1M UO2(NO3)2 - 0.5M HCOOH solution with hydrogen at atmospheric pressure. The course of the reduction was controlled analytically and by measuring the U(VI)/U(IV) redox potential. It was concluded that the catalysts obtained by impregnation of the supports prepared from nitrate stabilized gels exhibit the best activity and stability.

Słowa kluczowe

EN

sol-gel; Pt/Al2O3 catalysts; uranyl ion reduction

• Wydawca: Institute of Nuclear Chemistry and Technology
• Czasopismo: Nukleonika
• Rocznik: 2006
• Tom: Vol. 51,suppl.1
• Strony: 79--82
• Opis fizyczny: Bibliogr. 18 poz., rys.

Twórcy

autor

Deptuła A.

autor

Łada W.

autor

Olczak T.

autor

Chmielewski A.

• Department of Nuclear Methods of Material Engineering, Institute of Nuclear Chemistry and Technology, 16 Dorodna Str., 03-195 Warsaw, Poland, Tel.: [phone], Fax: [phone],

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