کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9610249 | 47163 | 2005 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Influence of rare earth elements La, Nd and Yb on the acidity of H-MCM-22 and H-Beta zeolites
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
کاتالیزور
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Influence of rare earth elements La, Nd and Yb on the acidity of H-MCM-22 and H-Beta zeolites Influence of rare earth elements La, Nd and Yb on the acidity of H-MCM-22 and H-Beta zeolites](/preview/png/9610249.png)
چکیده انگلیسی
The n-heptane cracking reaction shows that the effect of rare earth elements is related not only to the acidity but also with the porous structure of both zeolites. In H-Beta zeolite, the presence of RE elements enhances the acidity of the catalysts. In H-MCM-22 zeolite, the most relevant effect of rare earth elements is on the shape selectivity that becomes more pronounced with the ionic radius of the RE elements. The nature of the coke deposited on the two materials shows distinct profiles that are also related to its porous structure.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Catalysis Today - Volumes 107â108, 30 October 2005, Pages 663-670
Journal: Catalysis Today - Volumes 107â108, 30 October 2005, Pages 663-670
نویسندگان
Angela Martins, João M. Silva, Carlos Henriques, Fernando Ramôa Ribeiro, M. Filipa Ribeiro,