Removal of Sulfur Dioxide from Flue Gas by the Absorbent Prepared from Coal Ash: Effects of Nitrogen Oxide and Water Vapor
| Autor: | Nakamura Hideki, Hideshi Hattori, Ueno Tsutomu, Tomohiro Ishizuka, Hiroaki | Tsuchiai |
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| Rok vydání: | 1996 |
| Předmět: |
Flue gas
General Chemical Engineering Vapour pressure of water Inorganic chemistry General Chemistry complex mixtures Industrial and Manufacturing Engineering respiratory tract diseases Flue-gas desulfurization chemistry.chemical_compound chemistry Calcium sulfite Fly ash Calcium oxide Sulfur dioxide Water vapor |
| Zdroj: | Industrial & Engineering Chemistry Research. 35:851-855 |
| ISSN: | 1520-5045 0888-5885 |
| DOI: | 10.1021/ie950322p |
| Popis: | Removal of SO2 from flue gas by the absorbent prepared from coal fly ash, calcium oxide, and calcium sulfate was studied under different reaction conditions to elucidate the effects of the reaction temperature, water vapor pressure, and coexistence of NO in a flue gas. The SO2 removal activity increased with an increase in NO concentration up to 500 ppm at 130 °C. The SO2 removal activity increased as the water vapor pressure increased until a monolayer coverage with water molecule is achieved. As the adsorbed water exceeded the monolayer coverage, the SO2 removal activity suddenly decreased and calcium sulfite became the main product instead of calcium sulfate. The NO removal activity increased with an increase in SO2 concentration up to 2000 ppm at 130 °C. The NO removal also increased with an increase in water vapor pressure. The NO removal markedly decreased as the adsorbed water exceeded the monolayer coverage. |
| Databáze: | OpenAIRE |
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