Real-time characterization of the organic composition and size of individual diesel engine smoke particles

被引：51

作者：

Reilly, PTA ^{[1
]}

Gieray, RA ^{[1
]}

Whitten, WB ^{[1
]}

Ramsey, JM ^{[1
]}

机构：

[1] Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA

来源：

ENVIRONMENTAL SCIENCE & TECHNOLOGY | 1998年 / 32卷 / 18期

关键词：

D O I：

10.1021/es980135t

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Real-time analysis of individual diesel engine exhaust particles was demonstrated using an ion trap mass spectrometer. Measurements were made on the nebulized engine oil and diesel fuel for comparison with the exhaust particle analysis. Studies were performed on individual exhaust particles to determine composition as a function of aerodynamic size. MS/MS analysis positively identified low-mass PAHs as well as indicated the presence of high mass hydrogenated PAHs (HPAHs). The degree of PAH hydrogenation was found to be mass dependent. The origin of the HPAHs seems to be the diesel fuel. However, the HPAHs underwent some degree of oxidation during the combustion process on average. Indicators were found that might be used to determine combustion efficiency. The capability of the technique for on-line measurement of combustion processes was demonstrated.

引用

页码：2672 / 2679

页数：8

共 30 条

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