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- Type of Document: M.Sc. Thesis
- Language: Farsi
- Document No: 39096 (06)
- University: Sharif University of Technology
- Department: Chemical and Petroleum Engineering
- Advisor(s): Seyfkordi, Ali Akbar
- Abstract:
- Nowadays, a fluidized bed with gas plays an important part in the industry. The design of this kind of reactor requires knowing the interfacial area between two phases and this interfacial area leads to calculate the solid holdup in the bed. Consequently achieving interfacial area between gas and solid in the bed experimentally is so significant. On interfacial area measurement in fluidized bed with gas has been worked, but light transmission technique has been used less. Therefore, in the current research the possibility of using of this technique and its accuracy are investigated. Of course, fluidizing solid in gas phase is so difficult and it encounters problems such as gas improper distribution, channeling, bubbling and other non-uniformities. To measure, a fluidized bed was designed and the problems were averted as far as possible. By using three types of fine solid (sand, Purslane Seeds, Flix weld seeds )with equal shape and diameter and installing a optical system (light, lens, lens, photocell), the absorption of light during the time of fluidization with applying a multimeter has been measured. Results indicate that light transmission method principles that their validity has been proved in the gas-liquid system, by different reasons have no application in gas-solid system. One important reason could be non-uniformity in such systems
- Keywords:
- Fluidity ; Gas Holdup ; Light Transmission
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