Abstract
Reactor performance of a high flux circulating fluidized bed (CFB) downer is studied under superficial gas velocities of 3-7 m/s with solids circulation rate up to 300 kg/m2s using ozone decomposition reaction. Results show that the reactant conversion in the downer is closely related to the hydrodynamics, with solids holdup being the most influential parameter on ozone decomposition. High degree of conversion is achieved at the downer entrance region due to strong gas-solids interaction as well as higher solids holdup and reactant concentration. Ozone conversion increases with the increase of solids circulation rate and/or the decrease of superficial gas velocity. Overall conversion in the CFB downer is less than but very close to that in an ideal plug flow reactor indicating a good reactor performance in the downer because of the nearly "ideal" hydrodynamics in downer reactors.
| Original language | English |
|---|---|
| Pages (from-to) | 3412-3423 |
| Number of pages | 12 |
| Journal | AICHE Journal |
| Volume | 60 |
| Issue number | 10 |
| DOIs | |
| Publication status | Published - Oct 2014 |
| Externally published | Yes |
Keywords
- Circulating fluidized bed
- Downer
- High flux
- Hydrodynamics
- Ozone decomposition
- Reactor performance
ASJC Scopus subject areas
- Biotechnology
- Environmental Engineering
- General Chemical Engineering