| Title: | Load-Dependent Emission Factors and Chemical Characteristics of IVOCs from a Medium-Duty Diesel Engine |
| Author(s): | Cross ES; Sappok AG; Wong VW; Kroll JH; |
| Address: | "Aerodyne Research Inc. , Billerica, Massachusetts, 01821 United States. Filter Sensing Technologies Inc. , Malden, Massachusetts, 02148 United States" |
| ISSN/ISBN: | 1520-5851 (Electronic) 0013-936X (Linking) |
| Abstract: | "A detailed understanding of the climate and air quality impacts of mobile-source emissions requires the characterization of intermediate-volatility organic compounds (IVOCs), relatively-low-vapor-pressure gas-phase species that may generate secondary organic aerosol with high yields. Due to challenges associated with IVOC detection and quantification, IVOC emissions remain poorly understood at present. Here, we describe measurements of the magnitude and composition of IVOC emissions from a medium-duty diesel engine. Measurements are made on an engine dynamometer and utilize a new mass-spectrometric instrument to characterize the load dependence of the emissions in near-real-time. Results from steady-state engine operation indicate that IVOC emissions are highly dependent on engine power, with highest emissions at engine idle and low-load operation ( |
| Keywords: | Aerosols Hydrocarbons/analysis Mass Spectrometry/methods *Motor Vehicles Vehicle Emissions/*analysis Volatile Organic Compounds/*analysis/chemistry; |
| Notes: | "MedlineCross, Eben S Sappok, Alexander G Wong, Victor W Kroll, Jesse H eng Research Support, Non-U.S. Gov't 2015/10/16 Environ Sci Technol. 2015 Nov 17; 49(22):13483-91. doi: 10.1021/acs.est.5b03954. Epub 2015 Oct 28" |
