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Volatile organic compounds emitted from printing processes and their removal by adsorption

인쇄업에서 배출되는 반응성 VOCs 종류와 흡착 제거 방법의 적용

  • Ahn, Hae Young (Department of Civil and Environmental Engineering, Sejong University) ;
  • Lee, Yoon Kyoung (Department of Civil and Environmental Engineering, Sejong University) ;
  • Song, Ji Hyeon (Department of Civil and Environmental Engineering, Sejong University)
  • 안해영 (세종대학교 건설환경공학과) ;
  • 이윤경 (세종대학교 건설환경공학과) ;
  • 송지현 (세종대학교 건설환경공학과)
  • Received : 2018.12.03
  • Accepted : 2018.12.27
  • Published : 2018.12.31

Abstract

In this study, volatile organic compounds (VOCs) emitted from printing industries were analyzed, and an inorganic adsorbent, ${\gamma}-alumina$, 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 ${\gamma}-alumina$ 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 ${\gamma}-alumina$ 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 ${\gamma}-alumina$ must be implemented, and ozone oxidation and regeneration would be feasible options.

Keywords

Acknowledgement

Supported by : 한국연구재단

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