Reactant dynamics in catalytic fluidized bed reactors with flow reversal of gas in the emulsion phaset

✍ Scribed by Michael H. Peters; Liang-Shih Fan; Thomas L. Sweeney

• Publisher: Elsevier Science
• Year: 1982
• Tongue: English
• Weight: 947 KB
• Volume: 37
• Category: Article
• ISSN: 0009-2509
• DOI: 10.1016/0009-2509(82)80118-8

✦ Synopsis

Ahslrac-In the present study both the steady-state and transient behavior of reactant gas in a bubbling fluidized bed reactor are analytically investigated with the occurrence of flow reversal of emulsion phase gas. The model developed contains no adjustable constants and no major two-phase theory assumptions. In addition, the concept of local flow reversal of emulsion phase gas and emulsion phase de-gassing coefficients are introduced. The transient behavior of reactant gas as a function of the extent of flow reversal of gas, rate constant and reaction order, and operating superficial gas velocity is discussed. Finally, model predictium are shown lo cumpare favorably lo various reported experimental results including the division of gas ilow analysis, steady-state axial concentration profiles, overall conversions, and cumulative residence time distributions.