Soot Particle StudiesInstrument Inter-ComparisonProject Overview
Soot Particle StudiesInstrument Inter-ComparisonProject Overview
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DOI：
10.1080/02786826.2010.482113
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发表时间：
2010-01-01
影响因子：
5.2
通讯作者：
Davidovits, Paul
中科院分区：
文献类型：
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作者：
Cross, Eben S.;Onasch, Timothy B.;Davidovits, Paul
完成了用于测量烟尘颗粒的微物理和光学性质的仪器的内部对比研究。对以下基于质量的仪器进行了测试：Couette离心式颗粒物质量分析仪(CPMA)、飞行时间气溶胶质谱仪、扫描移动式颗粒物测定仪(AMS-SMPS)、单颗粒煤烟光度计(SP2)、煤烟颗粒-气溶胶质谱仪(SP-AMS)和光电气溶胶传感器(PAS2000CE)。光学仪器测量吸收(光声、干涉和滤光片)、散射(原地)和消光(光学腔内的光衰减)。这项研究涵盖了一个由318次运行组成的实验矩阵，系统地测试了一系列参数的仪器性能，这些参数包括：燃料当量比(1.8 Phi 5)、颗粒形状(质量迁移率指数(DFM)，2.0 DFM 3.0)、颗粒迁移率大小(30 Dm 300 Nm)、炭黑质量(0.07 MBC4.2 fg)和颗粒化学成分。在选定的运行中，用硫酸或癸二酸二辛酯(DOS)(0.5Rve 201 nm)包覆颗粒，其中Rve是包衣材料引起的体积当量半径的变化。测定了非吸波涂层对仪器响应的影响。在涂层和剥离过程中监测了分形碳烟颗粒的形态变化，确定了颗粒形状对仪器响应的影响。光学测量和基于质量的测量相结合被用来确定去除的碳烟颗粒的质量比吸收系数。还测量了颗粒的单次散射反照率。给出了实验的概述和样品结果。
An inter-comparison study of instruments designed to measure the microphysical and optical properties of soot particles was completed. The following mass-based instruments were tested: Couette Centrifugal Particle Mass Analyzer (CPMA), Time-of-Flight Aerosol Mass SpectrometerScanning Mobility Particle Sizer (AMS-SMPS), Single Particle Soot Photometer (SP2), Soot Particle-Aerosol Mass Spectrometer (SP-AMS) and Photoelectric Aerosol Sensor (PAS2000CE). Optical instruments measured absorption (photoacoustic, interferometric, and filter-based), scattering (in situ), and extinction (light attenuation within an optical cavity). The study covered an experimental matrix consisting of 318 runs that systematically tested the performance of instruments across a range of parameters including: fuel equivalence ratio (1.8 phi 5), particle shape (mass-mobility exponent (Dfm), 2.0 Dfm 3.0), particle mobility size (30 dm 300 nm), black carbon mass (0.07 mBC 4.2 fg) and particle chemical composition. In selected runs, particles were coated with sulfuric acid or dioctyl sebacate (DOS) (0.5 rve 201 nm) where rve is the change in the volume equivalent radius due to the coating material. The effect of non-absorbing coatings on instrument response was determined. Changes in the morphology of fractal soot particles were monitored during coating and denuding processes and the effect of particle shape on instrument response was determined. The combination of optical and mass based measurements was used to determine the mass specific absorption coefficient for denuded soot particles. The single scattering albedo of the particles was also measured. An overview of the experiments and sample results are presented.