Density-gradient water-based air filters: Gas/solid-permeable and liquid-impermeable design
발표자
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초록
내용
A water-based air filter (WAF) composed of an inner cylindrical hydrophilic filter and an outer hollow cylindrical hydrophobic filter was installed in an output chamber filled with water. The WAF with water (WAF-WW) showed outstanding recyclability for up to 100 cycles with consistent long-term performance and low pressure drops, which were better than those of commercial HEPA filters (H13), at similar PM2.5 concentrations (1,700 μg/m3) and air velocities (1 m/s). The WAF-WW also exhibited excellent recyclability up to the 50th cycle with fast and complete removal of HCHO gas at very low concentrations (0.08–4.98 ppm). Furthermore, since small PM0.3/PM2.5 particles and total volatile organic compound (TVOC) that are hardly filtered by air filters can be easily and quickly removed by the WAF-WW due to the water filter, this is another extraordinary benefit of the wet process over the dry process.