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首页> 外文期刊>Journal of Aerosol Science >Experimental study of filtration efficiency of nanoparticles below 20 nm at elevated temperatures
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Experimental study of filtration efficiency of nanoparticles below 20 nm at elevated temperatures

机译：高温下20 nm以下纳米颗粒过滤效率的实验研究

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This paper reports the measurements of the single fiber efficiency for a screen mesh at elevated temperatures up to 500 K for silver nanoparticles in the size range from 3 to 20 nm.Thermal rebound of particles from a filter surface is predicted to occur at 500 K for 3nm diameter particles based on a theory by Wang and Kasper[(1991).Filtration efficiency of nanometer-size aerosol particles.Journal of Aerosol Science,22,31-41];however,rebound was not detected in our study.A small change in the single fiber efficiency with temperature was observed for a fixed mass flow as is predicted by classical filtration theory.The measured increase of 8%±5% for particles of size 3,4,and 5 nm is less than the 19% predicted by classical filtration theory.Measurements of particle penetration at a temperature of about 600 K were not possible because of particle production within the filter/holder.
机译：本文报道了尺寸为3至20 nm的银纳米颗粒在高达500 K的高温下筛网的单纤维效率的测量结果，预计在500 K时颗粒会从过滤器表面发生热回弹。基于Wang和Kasper [（1991）的理论，直径为3nm的颗粒。纳米级气溶胶颗粒的过滤效率。气溶胶科学学报，22，31-41];但是，在我们的研究中未检测到反弹。如经典过滤理论所预测的，在固定质量流量下观察到单纤维效率随温度的变化。尺寸为3,4和5 nm的颗粒的实测增幅为8％±5％，小于由19nm预测的19％由于过滤器/固定器中会产生颗粒，因此无法在约600 K的温度下测量颗粒渗透率。

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