Air Particle Measurement

This digital document is an article from Journal of the Air & Waste Management Association, published by Air and Waste Management Association on October 1, 2010. The length of the article is 6686 words. The page length shown above is based on a typical 300-word page. The article is delivered in HTML format and is available immediately after purchase. You can view it with any web browser.Citation DetailsTitle: Theoretical versus observed gas-particle partitioning of carbonyl emissions from motor vehicles.(COMBUSTION AEROSOL 2009)(Report)Author: Jianjun ChenPublication: Journal of the Air & Waste Management Association (Magazine/Journal)Date: October 1, 2010Publisher: Air and Waste Management AssociationVolume: 60 Issue: 10 Page: 1237(8)Article Type: ReportDistributed by Gale, a part of Cengage Learning

Published on: 2010-10-01 Released on: 2010-11-08 Format: HTML Binding: Digital 23 pages

Excerpt. © Reprinted by permission. All rights reserved. ABSTRACT A state-of-the-science thermodynamic model describing gas-particle absorption processes was used to predict the gas-particle partitioning of mixtures of approximately 60 carbonyl compounds emitted from low-emission gasoline-powered vehicles, three-way catalyst gasoline-powered vehicles, heavy-duty diesel vehicles under the idle-creep condition (HDDV idle), and heavy-duty diesel vehicles under the five-mode test (HDDV 5-mode). Exhaust was diluted by a factor of 120-580 with a residence time of approximately 43 sec. The predicted equilibrium absorption partitioning coefficients differed from the measured partitioning coefficients by several orders of magnitude. Time scales to reach equilibrium in the dilution sampling system were close to the actual residence time during the HDDV 5-mode test and much longer than the actual residence time during the other vehicle tests...