In this study, volatile organic compounds (VOCs) emitted from printing industries were analyzed, and an inorganic adsorbent, γ-alumina, was selected for the effective control of the VOC emissions. Printing processes commonly require 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 model compounds 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 and IPA was 3~4 times higher than that of toluene. The column test performed at an inlet toluene concentration of 100 ppm showed that an 80% breakthrough for toluene was observed after 3 hours, but both MEK and IPA were continuously adsorbed during the same time period. A numerical model simulated that the γ-alumina could remove toluene at a loading rate of 0.4 mg/min only for a 4-hour period, which might be too short of a duration for real applications. Consequently, lifetime enhancement for γ-alumina must be implemented, and ozone oxidation and regeneration would be feasible options.

Abstract
 1. 서 론
 2. 실험재료 및 방법
  2.1 인쇄업 배출 주요 VOCs 분석
  2.2 VOCs 흡착 실험
 3. 결과 및 고찰
  3.1 인쇄업 배출 VOCs와 실험 대상 물질 선정
  3.2 등온 흡착 실험
  3.3 연속 유입 컬럼 흡착 실험
  3.4 수치모델을 이용한 흡착량 예측
  3.5 흡착제 수명 및 산화 재생
 4. 결 론
 References

• 안해영(세종대학교 건설환경공학과) | Hae Young Ahn (Department of Civil and Environmental Engineering, Sejong University)
• 이윤경(세종대학교 건설환경공학과) | Yoon Kyoung Lee (Department of Civil and Environmental Engineering, Sejong University)
• 송지현(세종대학교 건설환경공학과) | Ji Hyeon Song (Department of Civil and Environmental Engineering, Sejong University) Corresponding author