AAAR 36th Annual Conference October 16 - October 20, 2017 Raleigh Convention Center Raleigh, North Carolina, USA
Abstract View
Comparison of Different Neutralizing Methods by IPA on Electret Filter Media
MIN TANG, Sheng-Chieh Chen, Luying Liu, David Y. H. Pui, University of Minnesota
Abstract Number: 691 Working Group: Control and Mitigation Technology
Abstract The mitigation of nanoparticles is becoming an important topic as nanoparticles are produced in large numbers from manufacturing and combustion emission. Nanoparticles may affect human health because they can easily enter into the human body through respiratory system and their toxicity is very high due to large specific surface area. Air filtration is an effective way to mitigate nanoparticles and protect human health. It’s believed that nanoparticles were captured on the filter surface due to the Brownian diffusion mechanism. Many studies have shown that those small nanoparticles striking a filter surface could rebound if the initial kinetic energy is higher than the adhesion energy between the particle and the surface. Consequently, filtration efficiency against nanoparticles is thought to decrease due to the thermal rebound. In this study, sub-3 nm salt nanoparticles were generated by evaporation and rapid condensation method using a high temperature furnace. The filtration efficiency for sub-3 nm nanoparticles through metal mesh filter was measured using 1 nm nano-enhancer and condensation particle counter system. In addition, the effects of face velocity and high temperature were investigated for various nanoparticle diameters. Measurable thermal rebound was detected for sub-3 nm nanoparticles. Various theoretical models of thermal rebound from different researchers were compared and evaluated.