(주)에이피엠엔지니어링

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

Filtration Efficiency of Granular Activated Carbons to Polydisperse Ultrafine Particles through the Surface Adsoprtion

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.

Key words 

filtration efficiency, granular activated carbon, ultrafine particles, surface adsorption

▶출처 : 한국입자에어로졸학회 Vol. 18, No. 3: September 2022 pp. 79-86