کد مقاله کد نشریه سال انتشار مقاله انگلیسی ترجمه فارسی نسخه تمام متن
63708 48248 2016 8 صفحه PDF سفارش دهید دانلود کنید
عنوان انگلیسی مقاله ISI
Coking behaviors and kinetics on HZSM-5/SAPO-34 catalysts for conversion of ethanol to propylene
ترجمه فارسی عنوان
رفتار و کینتیک کک سازی در کاتالیزورهای HZSM-5/SAPO-34 برای تبدیل اتانول به پروپیلن
کلمات کلیدی
اتانول؛ کاتالیزور HZSM-5/SAPO-34؛ اسیدیته؛ کک؛ بازیابی
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی کاتالیزور
چکیده انگلیسی

The coke deposition on HZSM-5/SAPO-34 composite catalysts has been studied in the conversion of ethanol to propylene. The HZSM-5/SAPO-34 composite catalysts were synthesized by hydrothermal method (ZS-HS) and fully blending (ZS-MM). The used catalysts were characterized by XRD, N2 adsorption–desorption, TGA, TPO, elemental analysis, FTIR and XPS. The coking kinetics on both ZS-HS and ZS-MM has been investigated and their coking rate equations were obtained. The used ZS-MM catalyst had higher amount of coke and lower nC:nH than the used ZS-HS. 90% of the coke was deposited in the micropores of ZS-HS, while almost 45% of the coke located in the micropores of ZS-MM. The coke deposited on ZS-HS catalyst was mainly graphite-like carbon species, whereas dehydrogenated coke species was the major on ZS-MM. The coking activation energy of ZS-MM was lower than that of ZS-HS, and the coking rate on ZS-MM was faster than on ZS-HS. In addition, the regeneration of ZS-MM catalyst showed that it had a good hydrothermal stability. The differences on coking behaviors on the two catalysts were due to their different acidic properties and textures.

The HZSM-5/SAPO-34 composite catalysts, which synthesized by hydrothermal method and fully bending, had different coking behaviors and kinetics in the conversion of ethanol to propylene.Figure optionsDownload as PowerPoint slide

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Energy Chemistry - Volume 25, Issue 3, May 2016, Pages 545–552
نویسندگان
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