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자료유형
학술저널
저자정보
안해영 (세종대학교) 조윤정 (세종대학교) 송지현 (세종대학교)
저널정보
한국대기환경학회 한국대기환경학회지(국문) 한국대기환경학회지 제36권 제6호
발행연도
2020.12
수록면
774 - 784 (11page)
DOI
10.5572/KOSAE.2020.36.6.774

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이 논문의 연구 히스토리 (4)

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Volatile organic compounds (VOCs), major ozone precursors, are emitted from various organic solvents, and control methods such as adsorption are required to reduce their emission. Humid atmosphere of VOC emission sources decreases the adsorption efficiency. In this study, therefore, adsorption performance of zeolite adsorbents was tested at different humidity conditions. For these lab studies, three model VOCs, toluene, 1,2,4-trimethylbenzene (TMB), and methyl ethyl ketone (MEK), were selected because they are compounds found in general solvents. Adsorption column experiments were performed at three relative humidity (RH) of 20, 50, and 80%, and the pore and surface diffusion model (PSDM) was used to predict the column adsorption. As RH increased, the total amount of VOCs adsorbed decreased, and the amount of water absorbed per unit mass of the adsorbent increased as well. At RH of 20%, the adsorption capacities of single compounds were 117, 139, and 86 mg/g, for of toluene, TMB, and MEK, respectively, while they decreased dramatically to 83, 107, and 62 mg/g, respectively, with increasing RH to 80%. In particular at the high RH, the more hydrophilic compound, MEK, may promote moisture absorption on the adsorbent surface. When the three VOCs were introduced in a mixture to the adsorption column, MEK and toluene were initially adsorbed but later desorbed due to competitive adsorption with TMB. The modeling results of competitive adsorption by the PSDM were in agreement with the experimental results. At a dynamic condition, the effluent concentrations of the VOCs gradually increased when intermittent loading was repeated, because each VOC continued to accumulate in the adsorbent at different rates. Therefore, in order to optimize adsorption performance, it is necessary to consider the effects of humidity and competitive adsorption for the selection and design of adsorbent materials.

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Abstract
1. 서론
2. 실험재료 및 방법
3. 결과 및 고찰
4. 결론
References

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