한국폐기물자원순환학회지 제35권 제6호 (p.541-552)

|Original Paper|
미세먼지 및 미량 중금속(Hg) 동시 제거용 PTFE membrane filter 국산화 개발

Localization Development of PTFE Membrane Filter for Simultaneous Removal of Fine Particle and Heavy Metal(Hg)
키워드 :
Fine particle,Mercury,PTFE membrane,Adsorption,Filtration

목차

Abstract
I. 서 론
II. PTFE 특성 및 membrane filter 제조기술개발
  1. PTFE 특성 및 적용
  2. Filter media 및 PTFE membrane filter 특징
  3. PTFE membrane filter 제조기술 개발
III. PTFE 표면개질 및 중금속 흡착특성
  1. PTFE 표면개질
  2. ACF 표면개질
  3. 중금속 흡착특성 실험 장치
  4. 중금속 흡착특성 실험 결과
IV. PTFE membrane 필터 차압 및 여과특성
  1. PTFE membrane 필터 시편 차압특성
  2. PTFE membrane 필터 여과특성
V. 결 론
References

초록

Polluting gases emitted from industrial sites take compound forms consisting of gaseous and particulate phases. Localization of PTFE membrane filters has thus been initiated to remove particulate materials and mercury, which is a heavy and hazardous metallic element. More specifically, a PTFE membrane filter was fabricated by thermal laminating technology to vary porosity on the filter surface for removal of particulate materials thereon. Optimized equi-biaxial stretching ratio control enables minimization of large-size pore formation with an average pore size of 0.58 μm and improved air permeability of 8.03 cm3/cm2/sec. Various adsorbents were tested for removal of mercury vapor by surface treatment of the PTFE membrane filter. The filter’s surface was further altered using functional amine group compounds: one composed of silane coupling agent (APTMS) was found suitable as a mercury adsorbent. When ACF with a large surface area was used as support material, mercury removal efficiency increased threefold to 0.162 mg/g-ACF. Furthermore, the developed PTFE membrane filter was tested in its capacity of differential pressure and filtering efficiency using a pilot scale particulate removal unit. Stable and consistent differential pressure was maintained during long-term operation and less frequent periods of filter shutdown due to pores filling with 99.96% of particulate removal efficiency, which was more than satisfactory filtration efficiency.