کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1695848 | 1011878 | 2010 | 7 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Acid-activated vermiculites and phlogophites as catalysts for the DeNOx process Acid-activated vermiculites and phlogophites as catalysts for the DeNOx process](/preview/png/1695848.png)
Vermiculite and phlogopite were reacted with nitric acid under controlled conditions. The products were characterized by the composition (XRF), structure (XRD, FTIR, UV–vis–DRS), texture (BET); morphology (SEM) and surface acidity (NH3-TPD). Acid-activation increased the specific surface area and porosity and led to partial leaching of iron, aluminium and magnesium from the octahedral sheets. The acid-activated vermiculites and phlogopites were active and selective catalysts of the DeNOx process (4 NO + 4 NH3 + O2 = 4 N2 + 6 H2O). The best catalytic results were obtained for vermiculite activated with nitric acid (0.8 M) at 95 °C for 24 h. The modified phlogopites were less active. The best catalytic results were also obtained after reaction with HNO3 for 24 h.
Journal: Applied Clay Science - Volume 49, Issue 3, July 2010, Pages 156–162