کد مقاله کد نشریه سال انتشار مقاله انگلیسی ترجمه فارسی نسخه تمام متن
59160 1419420 2016 8 صفحه PDF سفارش دهید دانلود کنید
عنوان انگلیسی مقاله ISI
A novel method for enhancing the stability of ZSM-5 zeolites used for catalytic cracking of LPG: Catalyst modification by dealumination and subsequent silicon loading
ترجمه فارسی عنوان
یک روش جدید برای افزایش ثبات زئولیت های ZSM-5 مورد استفاده برای ترک خوردگی کاتالیزوری LPG: اصلاح کاتالیست های dealumination و بارگذاری سیلیکون پس از آن
کلمات کلیدی
Mesopores؛ نانولوله های کربنی؛ زئولیت ZSM-5 ؛ Dealumination؛ اسید تری کلرواستیک
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی کاتالیزور
چکیده انگلیسی

Composite structures of ZSM-5 zeolites were prepared by the synthesis of mesopores and micropores using carbon nanotubes as a template. Dealumination of mesopores was performed selectively using trichloroacetic acid, which could only diffuse into the mesopores and not the micropores owing to the size of the trichloroacetic acid molecules. Empty spaces are created in the catalyst as a result of removal of the Al atoms from the zeolite structure. If Si atoms fill the empty space, then the structure of the mesopores becomes similar to silicates, which do not have any catalytic properties. Silicon containing solution was used to fill the empty spaces, and in doing so, a unique method was developed, by which silicon atoms can directly replace the extracted Al atoms from the mesopore structure. Therefore, by changing the geometry and properties of the mesopores and micropores, the amount of coke reduced from 14% for HZSM-5 to 3% for the modified zeolite.

Graphical AbstractWe have reported the synthesis of mesopores and micropores in ZSM-5 zeolites by changing the geometry and properties of the mesopores using a new method. Selective dealumination of the mesopores by trichloroacetic acid and filling of the empty space with Silicon atoms resulted in inactive mesopore channels with lower production of coke and enhanced catalytic activity for catalytic cracking.Figure optionsDownload as PowerPoint slide

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Chinese Journal of Catalysis - Volume 37, Issue 4, April 2016, Pages 628–635
نویسندگان
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