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

조경일; 강기원; 신지윤; 김창혁

doi:10.11629/jpaar.2022.18.3.079

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 원문보기

Particle and aerosol research = 한국입자에어로졸학회지, v.18 no.3, 2022년, pp.79 - 86

조경일 (부산대학교 사회환경시스템공학과) , 강기원 (부산대학교 사회환경시스템공학과) , 신지윤 (부산대학교 사회환경시스템공학과) , 김창혁 (부산대학교 사회환경시스템공학과)

Abstract ▼ AI-Helper

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.

주제어

표/그림 (7)

그림 Figure 1 Experimental setup for investigating the particle filtration efficiency of the granular activated carbon
표 Table 1. Physical properties of granular activated carbon (GAC) used in this study
그림 Figure 2 Computational fluid dynamics simulations at Qtot = (a) 4, (b) 6, (c) 8, (d) 10, (e) 12, and (f) 14 lpm
표 Table 2. Experimental conditions for volume flow rates (Qtot, Qaero, and Qair) with coressponding Reynolds numbers (Re) and pressure drops (ΔP)
그림 Figure 3 Number Size distributions (dN/dLogD_p, #/cm³) of NaCl test aerosols measured upstream (UP) and downstream (DN) of the granular activated carbon (GAC) at different total volume flow rates (Qtot): (a) 4 - 8 lpm and (b) 10 - 14 lpm
그림 Figure 4 (a) Penetration of NaCl particles through the granular activated carbon (GAC) and (b) fitration efficiency of the GACs to the particles calculated by Eqs. (1) and (2) based on the measured number size distributions upstream and downstream of the GACs, respectively. Data from previous study (Kim et al., 2017) were also plotted together on the figures.
그림 Figure 5 Single sphere filtration efficiency (ηd) of the granular activated carbon (GAC)

참고문헌 (11)

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