شماره ركورد كنفرانس :
3306
عنوان مقاله :
Ultra Stable Zeolite Y, Preparation and Dealumination
Author/Authors :
Hossein Ghasemi Mobtaker Nuclear Science Research School - Nuclear Science and Technology Research Institute (NSTRI), Tehran , Mohammad Reza Pakzad Nuclear Science Research School - Nuclear Science and Technology Research Institute (NSTRI), Tehran , Ali Malekinejad Nuclear Science Research School - Nuclear Science and Technology Research Institute (NSTRI), Tehran , Hossein Kazemian Technology incubator - Sci & Technol. Park - Tehran University, Tehran
كليدواژه :
Ultra Stable Zeolite Y , Dealumination
عنوان كنفرانس :
كنفرانس بين المللي زئوليت ايران
چكيده لاتين :
Steamed HY or ultrastable Y (H-USY) zeolites are active hydrocarbon cracking catalysts. It concludes
that the large enhancement in cracking activity by steaming is due to increase in external surface area of the
zeolite crystals and possibly a small increase in the specific initiation activity of each site. Dealumination of
steamed zeolite by nitric acid, acid form of EDTA and oxalic acid treatment was investigated. The results
showed that these acids are effective in removing non-framework Al as well as framework Al from the
crystal. The collapse of crystal framework is depended on degree of dealumination
