IDEAS home Printed from https://ideas.repec.org/p/cdl/uctcwp/qt0c27s1mw.html
   My bibliography  Save this paper

Impacts of Oxygenated Gasoline Use on California Light-Duty Vehicle Emissions

Author

Listed:
  • Kirchstetter, Thomas W.
  • Singer, Brett C.
  • Harley, Robert A.

Abstract

Light-duty vehicle emissions were measured at the Caldecott Tunnel in August and October 1994. In the interval between these two periods, the average oxygen content of gasoline sold in the San Francisco Bay area increased from 0.3 to 2.0% by weight. Compared to the August (low-oxygenate) sampling period, measured pollutant emission rates during the October (high-oxygenate) sampling period for CO and VOC decreased by 21 +/- 7 and 18 +/- 10%, respectively, while NOx emissions showed no significant change. Formaldehyde emissions increased by 13 +/- 6%, acetaldehyde emissions did not change significantly, and benzene emissions decreased by 25 +/- 17%. Speciated VOC emission profiles show that the use of oxygenated gasoline resulted in higher MTBE and lower aromatic hydrocarbon emissions, higher isobutene, and lower aromatic aldehydes. The normalized reactivity of NMOG emissions did not change significantly between the low-oxygenate and high-oxygenate sampling periods. VOC exhaust speciation profiles for vehicles operating in the hot-stabilized mode at the Caldecott Tunnel math the speciation profile for cold-start emissions from new vehicles as measured in the Auto/Oil program. California's motor vehicle emission factor model, EMFAC7F, accurately predicts the VOC/NOx ratio measured at the Caldecott Tunnel in August, but underpredicts the observed CO/NOx ratio by a factor of 1.5-2.2 over the range of vehicle speeds observed at the tunnel.

Suggested Citation

  • Kirchstetter, Thomas W. & Singer, Brett C. & Harley, Robert A., 1996. "Impacts of Oxygenated Gasoline Use on California Light-Duty Vehicle Emissions," University of California Transportation Center, Working Papers qt0c27s1mw, University of California Transportation Center.
    • Handle: RePEc:cdl:uctcwp:qt0c27s1mw
    as

    Download full text from publisher

    File URL: https://www.escholarship.org/uc/item/0c27s1mw.pdf;origin=repeccitec
    Download Restriction: no
    ---><---

    Citations

    Citations are extracted by the CitEc Project, subscribe to its RSS feed for this item.
    as


    Cited by:

    1. Stefano Dugheri & Nicola Mucci & Giovanni Cappelli & Alessandro Bonari & Giacomo Garzaro & Giorgio Marrubini & Gianluca Bartolucci & Marcello Campagna & Giulio Arcangeli, 2019. "Monitoring of Air-Dispersed Formaldehyde and Carbonyl Compounds as Vapors and Adsorbed on Particulate Matter by Denuder-Filter Sampling and Gas Chromatographic Analysis," IJERPH, MDPI, vol. 16(11), pages 1-17, June.

    More about this item

    Keywords

    Social and Behavioral Sciences;

    Statistics

    Access and download statistics

    Corrections

    All material on this site has been provided by the respective publishers and authors. You can help correct errors and omissions. When requesting a correction, please mention this item's handle: RePEc:cdl:uctcwp:qt0c27s1mw. See general information about how to correct material in RePEc.

    If you have authored this item and are not yet registered with RePEc, we encourage you to do it here. This allows to link your profile to this item. It also allows you to accept potential citations to this item that we are uncertain about.

    We have no bibliographic references for this item. You can help adding them by using this form .

    If you know of missing items citing this one, you can help us creating those links by adding the relevant references in the same way as above, for each refering item. If you are a registered author of this item, you may also want to check the "citations" tab in your RePEc Author Service profile, as there may be some citations waiting for confirmation.

    For technical questions regarding this item, or to correct its authors, title, abstract, bibliographic or download information, contact: Lisa Schiff (email available below). General contact details of provider: https://edirc.repec.org/data/itucbus.html .

    Please note that corrections may take a couple of weeks to filter through the various RePEc services.

    IDEAS is a RePEc service. RePEc uses bibliographic data supplied by the respective publishers.