Removal of Sulfur Dioxide from Flue Gas by the Absorbent Prepared from Coal Ash: Effects of Nitrogen Oxide and Water Vapor
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- 作者：Hiroaki Tsuchiai ; Tomohiro Ishizuka ; Hideki Nakamura ; Tsutomu Ueno ; and Hideshi Hattori
- 刊名：Industrial & Engineering Chemistry Research
- 出版年：1996
- 出版时间：March 1996
- 年：1996
- 卷：35
- 期：3
- 页码：851 - 855
- 全文大小：200K
- 年卷期：v.35,no.3(March 1996)
- ISSN：1520-5045
文摘
Removal of SO2 from flue gas by the absorbent preparedfrom coal fly ash, calcium oxide, andcalcium sulfate was studied under different reaction conditions toelucidate the effects of thereaction temperature, water vapor pressure, and coexistence of NO in aflue gas. The SO2removal activity increased with an increase in NO concentration up to500 ppm at 130 
C. TheSO2 removal activity increased as the water vapor pressureincreased until a monolayer coveragewith water molecule is achieved. As the adsorbed water exceededthe monolayer coverage, theSO2 removal activity suddenly decreased and calcium sulfitebecame the main product insteadof calcium sulfate. The NO removal activity increased with anincrease in SO2 concentrationup to 2000 ppm at 130 C. The NO removal also increased with anincrease in water vaporpressure. The NO removal markedly decreased as the adsorbed waterexceeded the monolayercoverage.
C. TheSO2 removal activity increased as the water vapor pressureincreased until a monolayer coveragewith water molecule is achieved. As the adsorbed water exceededthe monolayer coverage, theSO2 removal activity suddenly decreased and calcium sulfitebecame the main product insteadof calcium sulfate. The NO removal activity increased with anincrease in SO2 concentrationup to 2000 ppm at 130 C. The NO removal also increased with anincrease in water vaporpressure. The NO removal markedly decreased as the adsorbed waterexceeded the monolayercoverage.