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논문 기본 정보

자료유형
학술저널
저자정보
이주형 (충북대학교) 한예지 (충북대학교) 이상섭 (충북대학교)
저널정보
한국대기환경학회 한국대기환경학회지(국문) 한국대기환경학회지 제41권 제1호
발행연도
2025.2
수록면
113 - 123 (11page)
DOI
10.5572/KOSAE.2025.41.1.113

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초록· 키워드

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Amine-based wet absorption is one of the most extensively studied carbon dioxide (CO₂) capture methods. However, the amine absorbents used in this process can release harmful substances, such as ammonia (NH₃) and aldehydes. These substances are released due to thermal and oxidative degradation. This degradation can negatively impact the environment and human health. This study analyzed the emission characteristics of NH₃ during an absorption-regeneration process. Monoethanolamine (MEA) was used as the absorbent in a laboratory-scale experiment. Simulated flue gases from LNG and coal-fired power plants were used. The CO₂ and O₂ concentrations in the LNG and coal-fired power plant flue gases were 4% CO₂ and 15% O₂, and 15% CO₂ and 5% O₂, respectively. To examine the effect of O₂ in the flue gas on NH₃ emissions, additional experiments were conducted under three conditions (0, 5, and 15% O₂). The results showed higher NH₃ emissions under LNG- fired power plant simulation conditions. NH₃ was emitted at high concentrations during the initial cycles under both conditions. Emissions decreased over time. NH₃ was emitted at consistently low levels during the regeneration process. The O₂ concentration in the inlet gas significantly influenced NH₃ emissions. Higher O₂ levels resulted in increased NH₃ emissions. Therefore, when CO₂ emissions are controlled at an LNG-fired power plant using the wet MEA process, the concentration of NH₃ emitted during the CO₂ absorption process is expected to be higher than that from a coal-fired power plant, while the concentration of NH₃ emitted during the CO₂ stripping process is expected to be similar. This indicates that harmful substances, such as NH₃, can be emitted from the wet MEA process used for CO₂ control, and that the emission characteristics can vary depending on the composition of the flue gas.

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Abstract
1. 서론
2. 연구 방법
3. 실험 결과
4. 결론
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