• 제목/요약/키워드: thermal pollution

검색결과 314건 처리시간 0.056초

고온 불활성 기체 분위기에서 아산화질소 열분해 및 반응속도에 관한 연구 (A Study of Nitrous Oxide Thermal Decomposition and Reaction Rate in High Temperature Inert Gas)

  • 이한민;윤재근;홍정구
    • 한국분무공학회지
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    • 제25권3호
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    • pp.132-138
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    • 2020
  • N2O is hazardous atmosphere pollution matter which can damage the ozone layer and cause green house effect. There are many other nitrogen oxide emission control but N2O has no its particular method. Preventing further environmental pollution and global warming, it is essential to control N2O emission from industrial machines. In this study, the thermal decomposition experiment of N2O gas mixture is conducted by using cylindrical reactor to figure out N2O reduction and NO formation. And CHEMKIN calculation is conducted to figure out reaction rate and mechanism. Residence time of the N2O gas in the reactor is set as experimental variable to imitate real SNCR system. As a result, most of the nitrogen components are converted into N2. Reaction rate of the N2O gas decreases with N2O emitted concentration. At 800℃ and 900℃, N2O reduction variance and NO concentration are increased with residence time and temperature. However, at 1000℃, N2O reduction variance and NO concentration are deceased in 40s due to forward reaction rate diminished and reverse reaction rate appeared.

플라즈마를 이용한 이륜자동차 배출가스저감 특성 (The removing characteristic of harmful exhaust from a motorcycle using non-thermal plasma)

  • 김영주;박홍재;정장근;이재동;박재윤;고희석
    • 한국전기전자재료학회:학술대회논문집
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    • 한국전기전자재료학회 2003년도 하계학술대회 논문집 Vol.4 No.2
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    • pp.1127-1130
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    • 2003
  • In the last several centuries, humankind have been experienced the material abundance with a development of technical civilization and being industrialized quickly. During the process of this, environmental pollutant have occurred naturally so that humankind have more interests for environment pollutant. Air pollution caused by exhaust from a car is very harmful for human. Most of exhaust from a gasoline engine are $CO_x(CO+CO_2),\;NO_x(NO+NO_2)$, and THC(Total Hydrocarbon). The method to remove these kinds of noxious gases are so many thing such as the three catalysts, $NO_x$ catalysts, Filter and so on. However, although air pollution caused by exhaust from motorcycle have also occurred very much, there is no regulation for motorcycle. In this paper, we studied to remove $CO_x(CO+CO_2),\;NO_x(NO+NO_2)$, THC exhaust from a motorcycle using non-thermal plasma In the result, $NO_x(NO+NO_2)$ concentration was decreased approximately 70% and THC(Total Hydrocarbon) was removed about 40%.

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Non-thermal Plasma Discharge를 이용한 $NO_x$ 제거에 관한 연구 (A Study on the removal of $NO_x$ by using Non-thermal Plasma Discharge)

  • 안정언;이석현;정용원
    • 한국대기환경학회:학술대회논문집
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    • 한국대기환경학회 2001년도 추계학술대회 논문집
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    • pp.419-420
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    • 2001
  • 최근 산업설비 및 기타 시설에서 배출되는 유해가스의 배출허용 기준이 계속 강화되고 있으며 그 중에서도 NOx는 SOx와 함께 대기오염의 주된 원인으로 작용하고 있다. 국내에서도 이들 유해가스를 제거하기 위한 플라즈마 적용기술이 활발히 연구되었으며, 일부 기술은 상용화 단계에 있다. NOx 제거에 있어서 펄스 코로나 방전에 의한 전자의 생성은 유입되는 가스 및 공기에 충돌하여 반응성이 큰 다량의 이온, 원자 및 radical(N, O, OH, $O_3$등)을 생성한다. (중략)

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국산 개발 배연탈황 설비의 제어루프 구현 (An implementation Of Control Loop For Domestic Flue Gas Desulfurization System)

  • 이찬주;김응석
    • 대한전기학회:학술대회논문집
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    • 대한전기학회 1998년도 하계학술대회 논문집 B
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    • pp.825-827
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    • 1998
  • Air pollution is one of the most important global issues of the environmental concerns. Some advanced foreign countries have developed the air pollution control technology. KEPCO has been researching on the air pollution control technology and developed the FGD(Flue Gas Desulfurization) system for 200MW thermal power plant. In this paper, we describe the major control loops implemented to the domestic FGD system. The major control loops are to be classified into booster fan control, absorber PH control and limestone density control. The control loops were applied to the actual desulfurization processes and proved to their performance.

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