کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
10239124 46027 2005 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Interaction between Ni and V with USHY and rare earth HY zeolite during hydrothermal deactivation
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی کاتالیزور
پیش نمایش صفحه اول مقاله
Interaction between Ni and V with USHY and rare earth HY zeolite during hydrothermal deactivation
چکیده انگلیسی
The effect of Ni and V in the hydrothermal deactivation of an ultrastable Y zeolite with and without rare earth elements is presented and discussed. Although in the presence of steam, vanadium itself is the main factor responsible for zeolite loss of surface area, for the rare earth containing sample the presence of nickel increased the vanadium effect. Temperature-programmed reduction of these zeolites further support this observation by showing an increased amount of mobile readily reducible vanadium species while nickel and rare earth interact. The same deleterious effect of nickel was also observed in rare earth containing FCC catalysts after hydrothermal deactivation.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Catalysis A: General - Volume 286, Issue 2, 7 June 2005, Pages 196-201
نویسندگان
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