Bubble coalescence in fluidized beds: Comparison of two theories
β Scribed by Roland Clift; J. R. Grace
- Publisher
- American Institute of Chemical Engineers
- Year
- 1971
- Tongue
- English
- Weight
- 299 KB
- Volume
- 17
- Category
- Article
- ISSN
- 0001-1541
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## Abstract Gasβsolids fluidized beds are characterized by the presence of gas voids or bubbles causing a massβtransfer resistance. Enhancing the mass transfer from the bubbles to the emulsion phase by reducing the bubble size can be advantageous for the chemical performance (like the conversion an
However, the bubbling up vapor flows just through the downcomer bottom-orifices. The vapor occupies the part the of orifice area, so the orifice area for liquid descending is reduced and the downcomer liquid height increases which causes a premature downcomer flood as well. Moreover, the orifice are