کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9610375 | 47172 | 2005 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Combustion of methane lean mixtures in reverse flow reactors: Comparison between packed and structured catalyst beds
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
کاتالیزور
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
The scope of this work is to compare systematically the performance of particle beds and monolithic beds in catalytic reverse flow reactors used for combustion of lean methane/air mixtures, using alumina-supported palladium as catalyst. Different values of gas surface velocity (0.1-0.3Â m/s), particle diameter (3-6Â mm, for particle bed), cell density (200-400 cpsi, for structured bed) and catalyst/inert ratio (0.4-1) were used for the simulation of the combustion of 3500Â ppm methane in both kinds of reverse flow reactor. An unsteady one-dimensional heterogeneous model has been developed and solved using a MATLAB code. The model, physical parameters and transport properties used had been experimentally validated in a previous work, operating with a particle bed reverse flow reactor. Results obtained indicate that the reverse flow reactor is more stable when the catalyst particle beds are use, although the difference with the monolith bed decreases as surface velocity increases. In contrast, pressure drops in the bed are higher for the particle bed.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Catalysis Today - Volume 105, Issues 3â4, 15 August 2005, Pages 701-708
Journal: Catalysis Today - Volume 105, Issues 3â4, 15 August 2005, Pages 701-708
نویسندگان
Pablo MarÃn, Miguel A.G. Hevia, Salvador Ordóñez, Fernando V. DÃez,