459511 Scale-up of Fluidized Reactors Based on Choas Analysis Approch and New Scale-up Methodology

Tuesday, November 15, 2016
Grand Ballroom B (Hilton San Francisco Union Square)
Haidar Taofeeq, Chemical & Biochemical Engineering, Missouri University of Science & Technology, Rolla, MO and Al-Dahhan Muthanna, Chemical & Biological Engineering, Missouri University of Science and Technology, Rolla, MO

The fluidized bed is consider one of importance solid-gas reaction systems due to its widely using in different industrial application such as catalyst regeneration, drying, gas adsorption, and gas-solid polymerization. Although fluidized bed reactors are simple in construction, a proper understating of their hydrodynamics, design, scale-up, and performance are still challenging due to the complexity of the flow structure and complex interaction between the phases. In the present work, the methods of chaos analysis and new scale-up methodology have been implemented and proposed to study the scale-up of two fluidized bed (0.44 m and 0.14 m inside diameter). The chaos analysis is based on the degree of chaos that is assessed by Komlogorov entropy, which is a measure of the rate of information loss in the system. The basic concept of the chaos scale-up approch is that the rate of information loss should kept simiale when scaling up a fluidized bed from small sacle to the large scale, in order to ensure hydrodynamic similarty betweed the two scaled beds. While, the basic idea of the new methodology of sacle-up that we proposed is that Radial profile or cross sectional distribution of gas holdup (or solids holdup) should be the same or closer for two beds to be hydrodynamically similar or closer. CFD was used as an enabling tool to identify the conditions of matching and mis-matching cases. It was found that the cases with same radial gas holdup or closer (maching casaes) are also possess the same radial Komlogorov entropy or closer and the cases with different radial gas holdup ( mis-maching cases) are also possess different radial Komlogorov entropy.

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