Equation for the superficial bubble-phase gas velocity in fluidized beds

✍ Scribed by Ching-Yeh Shiau; Chin-Jou Lin

• Publisher: American Institute of Chemical Engineers
• Year: 1991
• Tongue: English
• Weight: 159 KB
• Volume: 37
• Category: Article
• ISSN: 0001-1541
• DOI: 10.1002/aic.690370619

✦ Synopsis

Superficial bubble-phase gas velocity ( u b s ) is an important parameter in the fluidized-bed reactor design, since it influences many other parameters such as volume fractions of each phase and the superficial gas velocities for other phases. The earliest popular postulate of computing u b s , which is known as the two-phase theory of fluidization (Toomey and Johnstone, 1952), suggested that the gas flow rate in the bubble phase is equal to the excess gas flow above what is required for minimum fluidization: u b s = u-Urn? This method presents