Characterization of Diesel Particulates and Metal Nanoagglomerates using the Universal Nanoparticle Analyzer
Nanoparticle agglomerates play an essential role in the manufacturing of many nanomaterials and are commonly found in combustion products. Conventional aerosol instruments based on equivalent spheres are not directly applicable to the measurement of nanoparticle agglomerates. The increasing interest in real-time assessment of diesel soot mass makes it highly desirable to develop an online instrument for airborne agglomerates. A recently developed instrument, Universal Nanoparticle Analyzer (UNPA), was used in this study to characterize in situ the structure of diesel particulates and metal nanoparticle agglomerates generated by spark discharge. The primary particles sizes measured by UNPA for the soot and metal agglomerates are in reasonable agreement with the TEM sizing results. With regard to the mass concentration of silver agglomerates at room temperature, excellent agreement was found under our experimental conditions between the value calculated by UNPA, the prediction given by the effective density, and the gravimetric result whereas the SMPS gives a mass prediction larger by almost one order of magnitude.
Diesel particulates nanoparticle agglomerates spark discharge mass concentration
Jing Wang Zhun Liu Seong Chan Kim Jacob Swanson David Pui
Institute of Environmental Engineering,ETH Zurich,Zurich,8093,Switzerland Empa,Analytical Chemistr Particle Technology Laboratory,University of Minnesota,55414,USA
国际会议
西安
英文
28-33
2011-08-17（万方平台首次上网日期，不代表论文的发表时间）