کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
149657 456435 2012 15 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Thermal behavior of laboratory-scale catalytic packed beds
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
Thermal behavior of laboratory-scale catalytic packed beds
چکیده انگلیسی

In this contribution a simplified procedure that allows analyzing the thermal behavior of laboratory catalytic packed bed reactors is presented. To this end, it is proposed to solve an energy balance inside the reactor that accounts for the heat released by reactions through a suitable approximating function, thus avoiding the formulation and simultaneous solution of the mass conservation balances. The contribution of the different heat transport mechanisms is discussed under different fluid–dynamic conditions. As a reference case study, the catalytic oxidation of ethanol and ethyl-acetate mixture has been selected. Two reactor configurations are analyzed: the conventional laboratory axial packed bed reactor and a geometrically more complex system consisting in two coaxial tubes, the internal one lodging the catalyst sample and the effluent stream flowing counter-currently inside the external annular conduit. The methodology presented here can be readily implemented for most fixed bed catalytic reactors at laboratory scale.

Figure optionsDownload as PowerPoint slideHighlights
► Thermal analysis of laboratory scale catalytic fixed bed reactors.
► Discussion about the contribution of the different heat transport mechanisms.
► Estimation of local and average maximum temperature differences.
► Quantification of deviation from the isothermal behavior.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Chemical Engineering Journal - Volumes 198–199, 1 August 2012, Pages 397–411
نویسندگان
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