کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
58897 | 47180 | 2006 | 7 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Selective catalytic oxidation of ammonia into nitrogen over PCH modified with copper and iron species Selective catalytic oxidation of ammonia into nitrogen over PCH modified with copper and iron species](/preview/png/58897.png)
Porous clay heterostructures (PCH) obtained on the basis of the synthetic saponite was used as a catalytic support for the deposition of transition metal (Cu, Fe) oxides. Transition metal oxides were introduced into the parent as well as ammonia treated PCH support by the ion-exchange method. The obtained catalysts were characterized with respect to their textural parameters (BET), composition (EPMA), chemical nature of the introduced transition metal species (UV–vis–DRS) and surface acidity (NH3-TPD, FTIR). The modified PCH materials were tested as catalysts for the selective oxidation of ammonia to nitrogen and water. The studied catalysts have shown a very high selectivity towards N2, which did not drop below 90% in a large studied temperature range (150–550 °C). However, the Cu-containing samples were active at temperatures significantly lower than PCH modified with iron.
Journal: Catalysis Today - Volume 114, Issues 2–3, 15 May 2006, Pages 319–325