Abstract
Mesoporous molecular sieve Na-MCM-41 with Si/Al ratio 20 and 50 and Na-bcta zeolite with Si/Al ratio 11 were synthesized and characterized using X-ray powder diffraction, scanning electron microscope and nitrogen adsorption. The Ag (5 and 2 wt%) modifications of H-MCM-41-20, H-MCM-41-50 and H-beta-11 catalysts were carried out using impregnation method. The catalysts were tested in the decomposition of ozone at ambient temperature. The 5 wt% Ag-H-MCM-41 catalyst showed a very high decomposition of ozone (∼98%). The 5 wt% Ag-H-MCM-41-50 catalyst exhibited higher decomposition rate than 2 wt% AgH-MCM-41-50. The Ag modified H-MCM-41 catalyst with higher Si/Al ratio showed higher reaction rate than the catalyst with lower Si/Al ratio. The H-MCM-41 catalyst without Ag exhibited the lowest decomposition of ozone indicating an important role of Ag in the reaction.
| Original language | English |
|---|---|
| Pages (from-to) | 57-60 |
| Number of pages | 4 |
| Journal | Catalysis Letters |
| Volume | 98 |
| Issue number | 1 |
| DOIs | |
| Publication status | Published - Oct 2004 |
| MoE publication type | A1 Journal article-refereed |
Funding
This work is part of the activities at the Åbo Akademi Process Chemistry Centre within the Finnish Centre of Excellence Program (2000–2005) by the Academy of Finland. International Marie-Curie Fellowship by European Commission to Petya M. Konova is greatfully acknowledged.