## 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
Bubbles in a fluidized bed: A fast X-ray scanner
β Scribed by R. F. Mudde
- Publisher
- American Institute of Chemical Engineers
- Year
- 2010
- Tongue
- English
- Weight
- 447 KB
- Volume
- 57
- Category
- Article
- ISSN
- 0001-1541
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π SIMILAR VOLUMES
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
Knowledge of bed expansions is important in the design and operation of gas-solid fluidized beds. This paper presents a study on the estimation of expanded bed height in a large three-dimensional gas-fluidized bed with a square section of 0)61;0)61 m. All experiments were performed at the freely bub
## Abstract Recent advances in dense, multiphase, computational fluid dynamics (CFD) have allowed accurate simulation of the gas and particle motion in bubbling and circulating fluidized beds. Since fluidizedβbed reactors are used for many chemical processes, a simulation must also be able to accur