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자료유형
학술저널
저자정보
강정희 (세종대학교 토목환경공학과) 송지현 (세종대학교) 조준표 (세종대학교 건설환경공학과)
저널정보
한국냄새환경학회 실내환경 및 냄새 학회지 실내환경 및 냄새 학회지 제17권 제2호
발행연도
2018.1
수록면
182 - 190 (9page)

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Acidic and basic mixtures of odorous compounds are commonly emitted from various sources, and, in anabsorption process, pH conditions in the liquid phase significantly affect the performance. In this study, the effectof pH on mass transfer in a bubble column reactor was evaluated using hydrogen sulfide and ammonia as a modelmixture. Their mass transfer coefficients were then calculated. Furthermore, the total mass transfer coefficientsas a function of pH were evaluated, and the experimental data were fitted into an empirical equation usingdimensionless numbers. The mass transfer rates of hydrogen sulfide, the non-ionic form, increased dramaticallywith increasing pHs, while those of ammonia were almost unchanged because of its high solubility. As a result,a favorable pH condition for less soluble compounds must be selected to achieve high absorption capacity. Thetotal mass transfer rates, which took into account pH effects as well as all the non-ionic and ionic constituentstogether, were found to be from 2.2 to 2.4 × 10−3 min−1 for hydrogen sulfide and ammonia, respectively, and theywere almost constant at different pHs. The empirical equations, which were derived to obtain the best fit for thetotal mass transfer rates, implied that a method to increase diffusivity of each compound should be applied toimprove overall mass transfer. In addition, when using the empirical equation, a mass transfer coefficient at a givenset of pH and operating conditions can be calculated and used to design a water scrubbing process.

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