Skip directly to search Skip directly to A to Z list Skip directly to page options Skip directly to site content

NIOSHTIC-2 Publications Search

Search Results

The effects of load on organic species in diesel particulate matter (DPM).

Authors
Liang-F; Lu-M; Keener-TC; Liu-Z
Source
Proceedings of the AAAR 23rd Annual Conference, October 4-8, 2004, Atlanta, Georgia. Mount Laurel, NJ: American Association for Aerosol Research, 2004 Oct; :42
NIOSHTIC No.
20032839
Abstract
In current decades, there has been a growing interest in quantifying and reducing the amount of diesel particulate emissions from non-road diesel powered engines. Studies have indicated that diesel particulate matter (DPM) can be hazardous to human health since DPM is mainly in the respirable range (< 1microm) and many organic species in DPM, such as polycyclic aromatic hydrocarbons (PAHs) and alkylated PAHs, are considered as potential occupational carcinogens. On January 19, 2001, the U.S. Department of Labor's Mine Safety and Health Administration (MSHA) regulated diesel equipment emissions in underground coal mines and metal/non-metal mines, requiring a final limit of 160 microg/m3 of total carbon January 19, 2006. Many of the current studies focus on chemical composition of on-road and non-road diesel emissions. However, the load variated organic speciation of DPM has not been much studied, while speciation variation of DPM composition is expected due to the different engine operating conditions and fuel usage under different loads The aim of this study is to investigate the effects of load on the distribution of organic species in DPM. In our study, the tests were performed on a non-road diesel generator under loads from 0kW to 75kW. The organic compounds were identified and quantified with GC/MS and classified as n-alkanes, PAHs and alkylated PAHs. The results indicated that the concentrations as well as the species vary with loads, and the increase of loads is associated with the increase of particulates (EC). Under all the studied load conditions, alkylated PAHs take the largest portion. At low loads, methylphenanthrene, dimenthylphenanthrene and trimethylnaphthalene are the most abundant species. With load increasing, more smaller molecules were formed, such as dimethylbenzene and trimethylbenzene. n-Alkanes are also important organics in DPM. At lower loads, heptadecane (C17), octadecane (C18) and nonadecane (C19) are the most abundant species; while at higher loads, the abundant species have shifted to shorter chain n-alkanes (C11-C13).
Keywords
Particulates; Particulate-dust; Diesel-emissions; Diesel-exhausts; Analytical-processes; Analytical-instruments; Analytical-chemistry
Publication Date
20041004
Document Type
Abstract; Conference/Symposia Proceedings
Funding Amount
509978
Funding Type
Grant
Fiscal Year
2005
NTIS Accession No.
NTIS Price
Identifying No.
Grant-Number-R01-OH-007679
Priority Area
Personal Protective Technology
Source Name
Proceedings of the AAAR 23rd Annual Conference, October 4-8, 2004, Atlanta, Georgia
State
OH; GA
Performing Organization
University of Cincinnati
TOP