Farren, Naomi J. orcid.org/0000-0002-5668-1648, Wilson, Samuel, Bernard, Yoann et al. (4 more authors) (2024) An Ambient Measurement Technique for Vehicle Emission Quantification and Concentration Source Apportionment. Environmental Science and Technology. 20091–20100. ISSN 1520-5851
Abstract
We develop a new technique called plume regression where fast response instruments located at the roadside are used to measure exhaust plumes of passing vehicles. The approach is used to generate highly disaggregated vehicle emissions information by vehicle type, which compares well with traditional vehicle emission remote sensing. Additionally, the technique provides valuable new information on ambient concentration source apportionment by vehicle type. The technique is flexible enough to consider a wide range of air pollutants and be deployed at roadside ambient monitoring locations. The new approach is used to quantify emissions and concentration source apportionment for ammonia (NH3) and nitrogen oxides (NOx). We find that emissions of NH3 are generally very well controlled from diesel vehicles including those with selective catalytic reduction systems that use NH3 to reduce emissions of NOx. By contrast, gasoline passenger cars are shown to be the dominant contributor to NH3 emissions, which increase with vehicle mileage. Average fuel-specific NH3 emission factors for gasoline vehicles range from 0.3 to 1.2 g kg-1, while diesel vehicle emission factors remain below 0.06 g kg-1, with the exception of Euro VI buses with the latest regulatory provisions (0.5 g kg-1).
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | Publisher Copyright: © 2024 The Authors. Published by American Chemical Society. |
Keywords: | ammonia,plume sampling,regression,source apportionment,vehicle emissions |
Dates: |
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Institution: | The University of York |
Academic Units: | The University of York > Faculty of Sciences (York) > Chemistry (York) |
Depositing User: | Pure (York) |
Date Deposited: | 22 Nov 2024 10:10 |
Last Modified: | 22 Nov 2024 10:10 |
Published Version: | https://doi.org/10.1021/acs.est.4c07907 |
Status: | Published |
Refereed: | Yes |
Identification Number: | 10.1021/acs.est.4c07907 |
Related URLs: | |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:219961 |
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Description: An Ambient Measurement Technique for Vehicle Emission Quantification and Concentration Source Apportionment
Licence: CC-BY 2.5