Abstract
Reactive sorbents for SO2 removal from humidified flue gas were prepared from fly ash-Ca(OH)2 mixtures using the pressure hydration technique. The fly ash samples were taken from three different coal-fired power plants in Turkey. The fly ash/Ca(OH)2 weight ratio, hydration time, and temperature were varied during the sorbent preparation step. Effects of these variations on the physical properties of activated sorbents were investigated. A statistical design technique was applied by use of a two-level factorial design matrix to interpret experimental results. It was found that increasing the temperature and fly ash/Ca(OH)2 weight ratio caused a decrease in the total surface area of sorbents. However, surface area values of sorbents were not generally affected by the hydration time variation. Finally, fly ash-Ca(OH)2 sorbents prepared at the optimum hydration conditions were sulphated at 338 K with a synthetic gaseous mixture containing 5000 ppm SO2 and 55% relative humidity.
| Original language | English |
|---|---|
| Pages | 945-953 |
| Number of pages | 9 |
| Volume | 20 |
| No. | 10 |
| Specialist publication | Energy Sources |
| DOIs | |
| Publication status | Published - 1998 |
Keywords
- Pressure hydration
- Sorbent
- Statistical design
