کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
57292 47113 2008 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Evaluation of the hydrodynamics of high-pressure ebullated beds based on dimensional similitude
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی کاتالیزور
پیش نمایش صفحه اول مقاله
Evaluation of the hydrodynamics of high-pressure ebullated beds based on dimensional similitude
چکیده انگلیسی

The scale-up method for three-phase fluidized beds hydrodynamics proposed by Safoniuk et al. [M. Safoniuk, J.R. Grace, L. Hackman, C.A. McKnight, Chem. Eng. Sci. 54 (1999) 4961], based upon the principles of dynamic similitude, was tested matching several systems operated at high pressure with model systems operated at atmospheric pressure. Experiments were carried out to test this technique by comparing global phase holdups, and flow regime in systems where the five dimensionless groups proposed by the method were matched, but which were operated at significantly different pressures. The differences observed between the hydrodynamic parameters of the high pressure and model systems suggest that the five dimensionless groups employed are not enough to fully characterize the global bed behavior. Similar findings have been reported by Macchi et al. [A. Macchi, H. Bi, J.R. Grace, C.A. McKnight, L. Hackman, Chem. Eng. Sci. 54 (2001)] based on differences observed in the local dynamic bed behavior between systems operated at atmospheric pressure.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Catalysis Today - Volume 130, Issues 2–4, 30 January 2008, Pages 519–526
نویسندگان
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