کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9610118 | 47167 | 2005 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Comparison of wall-coated and packed-bed reactors for steam reforming of methanol
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
کاتالیزور
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
The kinetics of methanol steam reforming on a commercial CuO/ZnO/Al2O3 catalyst in packed-bed and wall-coated microreactors were compared experimentally. Different dimensions of both reactor configurations were tested and the transport limitations were analyzed using 2D reactor models. Packed-bed reactors of dimensions from 4.1 down to 1âmm i.d. were found to be heat transfer limited and temperature gradients of up to 40âK could exist in the bed. The reactor diameter required to eliminate temperature gradients was estimated to be 300âμm, which clearly is not practical. On the other hand, the wall-coated reactor was found to be free from any mass or heat transfer limitations in dimensions from 4.1âmm down to 200âμm i.d. Our modeling results showed that the reactor volumetric productivity increases with thicker catalyst wall-coatings for the same reactor diameter. We also show that the wall-coated reactor offers a better solution to achieve low pressure drop and high catalyst activity compared to a packed-bed microreactor.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Catalysis Today - Volume 110, Issues 1â2, 15 December 2005, Pages 86-91
Journal: Catalysis Today - Volume 110, Issues 1â2, 15 December 2005, Pages 86-91
نویسندگان
Ayman Karim, Jaime Bravo, David Gorm, Travis Conant, Abhaya Datye,