| title: | Oil shale ashes formed in circulating fluidized bed as sorbents for acidic gases |
|---|---|
| reg no: | ETF6195 |
| project type: | Estonian Science Foundation research grant |
| status: | accepted |
| institution: | Tallinn Technical University |
| head of project: | Andres Trikkel |
| duration: | 01.01.2005 - 31.12.2007 |
| description: | With switching to more effective CFBC technology instead of powdered combustion in Estonian power stations, radical changes can be expected in the structure, phase composition and chemical properties of this new type of oil shale ash as compared to powdered combustion ashes. The aim of this project is to elaborate: - chemical composition, structure and physical properties of the ashes obtained from different points of the CFB boiler in comparison to powdered combustion ashes, as well as the potentially higher content of sulphide sulphur, which is an essential indicator from the point of view of environmental risks at storage of the ashes; - assumable higher sulphur dioxide binding ability of the ashes, in order to use them for reducing SO2 emissions by methods of dry desulphurization, as well as recarbonation process of the ashesin order to clarify secondary carbonaceous deposits formation on the heating surfaces of CFB boilers determining mechanism and kinetic parameters of the reactions in these systems; - possibilities for neutralizing the high alkalinity of the ashes with flue gases from the boiler by directing them into ash – hydrotransport water suspension, which enables also to reduce CO2 emissions. Expectable results would enable to review existing possibilities for binding acidic gases, widen the areas of usage of this vast and environmentally dangerous waste product and create safer storage conditions. |
| project group | ||||
|---|---|---|---|---|
| no | name | institution | position | |
| 1. | Tiit Kaljuvee | Tallinn Technical University | senior research associate | |
| 2. | Rein Kuusik | Tallinn Technical University | senior research associate | |
| 3. | Andres Trikkel | Tallinn Technical University | assoc. prof. | |
| 4. | Mai Uibu | Tallinn Technical University | engineer | |