인쇄업에서 배출되는 반응성 VOCs 종류와 흡착 제거 방법의 적용 = Volatile organic compounds emitted from printing processes and their removal by adsorption

다국어 초록 (Multilingual Abstract)

In this study, volatile organic compounds (VOCs) emitted from printing industries were analyzed, and an inorganicadsorbent, γ-alumina, was selected for the effective control of the VOC emissions. Printing processes commonlyrequire inks, thinners, and cleaners, and they were mixed organic solvents containing aromatic compounds, ketones,and alcohols. Therefore, toluene, methyl ethyl ketone (MEK), and isopropyl alcohol (IPA) were selected as modelcompounds for this study. The adsorptive properties using γ-alumina were determined for the model compounds.
Both batch isotherm and continuous flow column tests demonstrated that the adsorption capacity of MEK andIPA was 3~4 times higher than that of toluene. The column test performed at an inlet toluene concentration of100 ppm showed that an 80% breakthrough for toluene was observed after 3 hours, but both MEK and IPA werecontinuously adsorbed during the same time period. A numerical model simulated that the γ-alumina could removetoluene at a loading rate of 0.4 mg/min only for a 4-hour period, which might be too short of a duration for realapplications. Consequently, lifetime enhancement for γ-alumina must be implemented, and ozone oxidation andregeneration would be feasible options.

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