Résumé
This work was devoted to the study of the selective catalytic reduction of NO by NH 3 on calcined and hydrothermal treated cerium loaded zeolite catalysts. The parent faujasite zeolite Na-F (Si/Al = 1.32 and S BET = 749 m 2 /g) used as support for the preparation of the catalysts was obtained from industrial sodium metasilicate and aluminum scraps. As expected, the NO conversion increased with increasing the percentage of cerium in the structure of the faujasite zeolite. Total NO conversion into N 2 was reached at 400°C at a space velocity of 250,000 h-1. The high conversion is due to the redox shift between Ce 3+ / Ce 4+ and the strong acid sites related to the rare earth present in the framework that is the key in SCR of NO process. Moreover, the highest loaded cerium catalyst retained high almost its activity after thermal hydrotreatment at 850°C. This higher loading is desirable for both activity and stability provided that two stages of preparation are used to put the Ce ions in the sodalite cages.