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논문 기본 정보
- 자료유형
- 학술대회자료
- 저자정보
- 발행연도
- 2014.5
- 수록면
- 85 - 91 (7page)
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이 논문의 연구 히스토리 (10)
2014
2012
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초록· 키워드
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The aim of this study is to develop the combined DOC and urea-SCR aftertreatment system for reducing NOx emissions in LPG steam boilers. When NOx emissions are reduced by NH₃ in an SCR reactor, the NOx conversion efficiency is increased if the fast SCR reaction with a 1 : 1 mixture of NO and NO₂ is formed. The upstream DOC in an SCR reactor can be used to oxidize NO to NO₂ emission. The NOx conversion efficiency can be raised with increasing the urea injection rate, but the NH₃ slip is boosted at the same time. Consequently, to determine the appropriate amount of urea injection or the high NOx conversion efficiency for the respective boiler load, the NOx emissions, NH₃ slip and reaction temperature should be simultaneously considered. In this study, when the urea amounts of 18, 20, 19 and 14mg/min for the boiler loads of 100, 80, 60 and 40% are appropriately determined and injected in the SCR reactor, the final NH₃ slips are measured by 13.92, 9.29, 18.35 and 20.05 ppm. It is found that NOx conversion efficiencies are calculated by 89, 90, 96 and 100% at the boiler loads of 100, 80, 60 and 40%. Moreover, THC and soot emissions for the respective boiler load of all experimental conditions are not formed by applying the combined DOC and urea-SCR aftertreatment system, and CO, O₂ and SO₂ emissions for the same experimental condition are more reduced in comparison with the only SCR reactor.
목차
Abstract
1. 서론
2. 실험장치 및 방법
3. 실험결과 및 고찰
4. 결론
References
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