Influence of a catalytic stripper on the response of real time aerosol instruments to diesel exhaust aerosol
Influence of a catalytic stripper on the response of real time aerosol instruments to diesel exhaust aerosol
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DOI：
10.1016/j.jaerosci.2004.11.021
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发表时间：
2005-09-01
影响因子：
4.5
通讯作者：
Johnson, JP
中科院分区：
文献类型：
--
作者：
Kittelson, DB;Watts, WF;Johnson, JP
本研究的目的是评估一套便携式实时气溶胶仪器对柴油机排气气溶胶的响应，有和没有催化汽提塔（CS），以确定响应的变化作为粒度和挥发性的函数。柴油机气溶胶的物理化学性质对光电子气溶胶传感器的响应有很大的影响。一个大的，主要是挥发性核模式的存在下，和/或挥发性物质的存在下，在固体碳质团聚体的表面上的积累模式抑制PAS响应。通过CS的气溶胶通道的挥发性材料的去除增强了响应，并且改善了PAS、扩散充电器（DC）和扫描迁移率粒度仪（SMPS）之间的相关性。气溶胶的尺寸分布，数量，体积和表面积浓度与和没有CS在样品流中的数据报告。(C)2005爱思唯尔有限公司保留所有权利。
The objective of this study was to evaluate the response of a suite of portable, real-time aerosol instruments to Diesel exhaust aerosol with and without a catalytic stripper (CS) to determine the change in response as a function of particle size and volatility. The response of the photoemission aerosol sensor (PAS) was strongly influenced by the physical and chemical nature of Diesel aerosol. The presence of a large, predominantly volatile nuclei mode, and/or the presence of volatile material on the surface of the solid carbonaceous agglomerates in the accumulation mode suppressed the PAS response. Removal of the volatile material by passage of the aerosol through the CS enhanced the response, and improved correlations between the PAS, the diffusion charger (DC) and the scanning mobility particle sizer (SMPS). Data on aerosol size distributions, number, volume, and surface area concentrations with and without the CS in the sample stream are reported. (C) 2005 Elsevier Ltd. All rights reserved.