- Tytuł:
- Application of Pt/Al2O3 catalysts produced by sol-gel process to uranyl ion reduction
- Autorzy:
-
Deptuła, A.
Łada, W.
Olczak, T.
Chmielewski, A. - Powiązania:
- https://bibliotekanauki.pl/articles/146103.pdf
- Data publikacji:
- 2006
- Wydawca:
- Instytut Chemii i Techniki Jądrowej
- Tematy:
-
sol-gel
Pt/Al2O3 catalysts
uranyl ion reduction - Opis:
- 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.
- Źródło:
-
Nukleonika; 2006, 51,suppl.1; 79-82
0029-5922
1508-5791 - Pojawia się w:
- Nukleonika
- Dostawca treści:
- Biblioteka Nauki
Artykuł