화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Journal of Industrial and Engineering Chemistry, Vol.13, No.6, 965-970, November, 2007
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Factors Affecting Flux and Water Separation Performance in Air Gap Membrane Distillation
Manickam Matheswaran, Tae Ouk Kwon, Jae Woo Kim1, and Il Shik Moon†
  • Department of Chemical Engineering, Sunchon National University, Chonnam 540-742, Korea
  • 1Laboratorium for Quantum Optics, Korea Atomic Energy Research Institute, Daejeon 305-353, Korea
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An air gap membrane distillation system having a polytetrafluoroethylene (PTFE) hydrophobic porous membrane was used for the removal of water from nitric acid/water mixtures. The influences of the feed temperature, feed concentration, flow rate, and air gap on the permeate flux and the selectivity of water were studied. The selectivity of water and flux were decreased with increasing feed concentration. With increasing feed flow rate and feed temperature, a decrement in the selectivity of water and an increment in flux were observed. The effect of the air gap thickness was also examined. Recirculation significantly changed the flux and nitric acid concentration in the permeate. This process share the best performance for the removal of water as vapor from nitric acid mixtures through a hydrophobic porous membrane.
Keywords:air gap membrane distillation (AGMD);total flux;nitric acid flux;selectivity of water;azeotropic
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