Particle and aerosol research (한국입자에어로졸학회지)

Korean Association for Particle and Aerosol Research (한국입자에어로졸학회)
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Filtration Efficiency of Granular Activated Carbons to Polydisperse Ultrafine Particles through the Surface Adsoprtion

그래뉼 타입 활성탄 필터의 100 나노 미만 다분산 초미세먼지 표면흡착 제거 효율 연구

  • Cho, Kyungil (School of Civil and Environmental Engineering, Pusan National University) ;
  • Kang, Giwon (School of Civil and Environmental Engineering, Pusan National University) ;
  • Shin, Jiyoon (School of Civil and Environmental Engineering, Pusan National University) ;
  • Kim, Changhyuk (School of Civil and Environmental Engineering, Pusan National University)
  • 조경일 (부산대학교 사회환경시스템공학과) ;
  • 강기원 (부산대학교 사회환경시스템공학과) ;
  • 신지윤 (부산대학교 사회환경시스템공학과) ;
  • 김창혁 (부산대학교 사회환경시스템공학과)
  • Received : 2022.09.13
  • Accepted : 2022.09.25
  • Published : 2022.09.30
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Abstract

Many commercial air purifiers currently have deployed granular activated carbon (GAC) filters for removing volatile organic compounds in the indoor air. GACs are generally used to remove gaseous contaminants in the air through adsorption by the inner surfaces of pores. In addition, airborne particles can be also filtered by the surface adsorption of the GACs, which can improve the life-time of the particulate filters. In this study, the filtration efficiency of GACs to ultrafine particles through surface adsorption was investigated at different volume flow rates by deploying a continuous particle filtration system. The polydisperse sodium chloride (NaCl) particles were generated by a set of an atomizer and a diffusion dryer, and then mixed with particle-free air at different volume flow rates. The penetration of ultrafine particles and pressure drop for each experimental condition were measured to figure out the effect of the volume flow rate on the surface adsoprtion of the GACs to particles, ~ 2 mm. The particle filtration efficiency of the GACs decreased as the volume flow rate increased from 4 to 14 lpm. However, the 5 times thicker GAC filter layer decreased the penetration of ultraparticles than a preious study. The filtration efficiency of the single granule was also higher than the previous result in the literature with smaller granule filter materials.

Keywords

Acknowledgement

이 연구는 부산대학교 기본연구지원사업(2년)에 의하여 연구되었으며, 이에 감사드립니다.

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