High-Efficiency Low-Resistance Oil-Mist Coalescence Filtration Using Fibrous Filters with Thickness-Direction Asymmetric Wettability

被引:81
作者
Wei, Xin [1 ]
Zhou, Hua [1 ]
Chen, Feng [2 ]
Wang, Hongxia [1 ]
Ji, Zhongli [2 ]
Lin, Tong [1 ]
机构
[1] Deakin Univ, Inst Frontier Mat, Geelong, Vic 3216, Australia
[2] China Univ Petr, Beijing Key Lab Proc Fluid Filtrat & Separat, Coll Mech & Transportat Engn, Beijing 102249, Peoples R China
基金
澳大利亚研究理事会;
关键词
coalescence filters; directional oil transport; glass fibers; oil mist; superoleophobic; DRAINAGE LAYER; LIQUID DISTRIBUTION; TRANSPORT FABRICS; PRESSURE-DROP; PERFORMANCE; SATURATION; MEDIA; WET; NANOFIBERS; PARTICLES;
D O I
10.1002/adfm.201806302
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Conventional aerosol filters typically have homogeneous wettability with limited filtration ability especially for small oil mists. Increasing filtration efficiency using thicker filter pad or finer fibers both result in considerable increase of pressure drop, which adversely increases energy consumption. It remains a challenge to develop effective filter materials that can effectively remove oil mists from air at a low flow resistance. Here, a novel concept about improving oil mist filtration efficiency without apparently increasing pressure drop using a fibrous filter with asymmetric wettability across the thickness is demonstrated. Dip-coating and single-side electrospraying are used to make fibrous filter have a homogeneous superoleophobicity or directional oil-transport function. When the two are combined together, they show a filtration efficiency as high as 99.45% for small oil mists (size 0.01-0.8 mu m) and nearly 100% for large oil mists (size 0.5-20 mu m) with a pressure drop of 9.29 kPa. With the same thickness and fibrous structure, our directional oil-transport/superoleophobic filter has higher quality factor than those with homogeneous oleophilic, superoleophobic, and asymmetric wettability of other superoleophilic/superoleophobic combinations, for both small and large oil mists. Directional oil transport-superoleophobic filters may lead to a novel, high-performance, low energy consumption oil mist separation technology.
引用
收藏
页数:8
相关论文
共 60 条
[1]  
Agranovski IE, 2001, CHEM ENG TECHNOL, V24, P287, DOI 10.1002/1521-4125(200103)24:3<287::AID-CEAT287>3.0.CO
[2]  
2-P
[3]   Nanofibrous filtering media: Filtration problems and solutions from tiny materials [J].
Barhate, R. S. ;
Ramakrishna, Seeram .
JOURNAL OF MEMBRANE SCIENCE, 2007, 296 (1-2) :1-8
[4]  
Baron P.A., 2011, Aerosol measurement: principles, techniques, and applications
[5]  
Bharadwaj R., 2008, J ENG FIBER FABR, P29
[6]   Bio-inspired microfluidic devices for passive, directional liquid transport: Model-based adaption for different materials [J].
Buchberger, Gerda ;
Hischen, Florian ;
Comanns, Philipp ;
Baumgartner, Richard ;
Kogler, Alexander ;
Buchsbaum, Andreas ;
Bauer, Siegfried ;
Baumgartner, Werner .
EUROSENSORS 2015, 2015, 120 :106-111
[7]   Hydrophobic/Hydrophilic Cooperative Janus System for Enhancement of Fog Collection [J].
Cao, Moyuan ;
Xiao, Jiasheng ;
Yu, Cunming ;
Li, Kan ;
Jiang, Lei .
SMALL, 2015, 11 (34) :4379-4384
[8]   The effect of a drainage layer on saturation and liquid distribution of oleophobic coalescence filters [J].
Chang, Cheng ;
Ji, Zhongli ;
Liu, Jialin .
SEPARATION AND PURIFICATION TECHNOLOGY, 2018, 194 :355-361
[9]   The effect of a drainage layer on the saturation of coalescing filters in the filtration process [J].
Chang, Cheng ;
Ji, Zhongli ;
Liu, Jialin .
CHEMICAL ENGINEERING SCIENCE, 2017, 160 :354-361
[10]   The effect of a drainage layer on filtration performance of coalescing filters [J].
Chang, Cheng ;
Ji, Zhongli ;
Zeng, Fanyong .
SEPARATION AND PURIFICATION TECHNOLOGY, 2016, 170 :370-376