Effect of Calcium Sulfate Addition on the Activity of the Absorbent for Dry Flue Gas Desulfurization
| Autor: | Tsunehiro Tanaka, Hideshi Hattori, Takashi Yamamoto, Ishizuka Tomohiro, Murayama Takeshi |
|---|---|
| Rok vydání: | 2001 |
| Předmět: |
Sorbent
Calcium hydroxide business.industry General Chemical Engineering fungi technology industry and agriculture Energy Engineering and Power Technology chemistry.chemical_element respiratory system Calcium complex mixtures Flue-gas desulfurization chemistry.chemical_compound Fuel Technology chemistry Fly ash Calcium silicate Coal Calcium oxide business Nuclear chemistry |
| Zdroj: | Energy & Fuels. 15:438-443 |
| ISSN: | 1520-5029 0887-0624 |
| DOI: | 10.1021/ef000186n |
| Popis: | The addition of calcium sulfate in the procedures of preparing flue gas desulfurization absorbent from calcium oxide and coal fly ash causes a negative effect in the slaking step and a positive effect in the following hydrothermal treatment step. The role of calcium sulfate added in each step was investigated. For the slaking step, XRD, XAFS, and Raman spectroscopic studies revealed that the addition of calcium sulfate in the step of slaking CaO with coal fly ash resulted in the coverage of calcium hydroxide with calcium sulfate to decrease the reactivity of the calcium hydroxide toward coal fly ash to form calcium silicate. For the hydrothermal treatment step, measurements of XRD, surface area, and Raman spectrum revealed that the addition of calcium sulfate promotes the formation of calcium silicate by suppressing crystal growth of calcium hydroxide to keep the reactivity of the calcium hydroxide toward coal fly ash. |
| Databáze: | OpenAIRE |
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