Impact of cold climates on vehicle emissions: the cold start air toxics pulse : final report.

Jobson, Tom; Huangfu, Yibo

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Impact of cold climates on vehicle emissions: the cold start air toxics pulse : final report.

2016-09-21
By Jobson, Tom ; Huangfu, Yibo

File Language:

English

Details

Creators:

Jobson, Tom ; Huangfu, Yibo
Corporate Creators:

Washington State University. Department of Civil and Environmental Engineering
Corporate Contributors:

United States. Department of Transportation
Subject/TRT Terms:
Resource Type:

Tech Report
Geographical Coverage:

United States ; Washington
Edition:

Final report
Corporate Publisher:

Washington State University
Abstract:

This project measured cold start emissions from four vehicles in winter using fast response instrumentation to accurately measure the ; time variation of the cold start emission pulse. Seventeen successful tests were conducted over a temperature range of -4°C to 10°C in ; winter 2015 at the Washington State University campus. Vehicle cold starts are thought to be a significant source of air toxic ; compounds in cold winter environments due to the rapid increase in mass emission rates with decreasing temperature. We used a ; proton transfer reaction mass spectrometer for high time resolution measurement of the emissions the air toxic compounds benzene, ; formaldehyde, acetaldehyde, in addition to toluene and C2-alkylbenzenes. Measured molar emission ratios relative to toluene in the ; cold start pulse were compared with cold start emission profiles for E10 fueled vehicles used in the EPA MOVES2014 model. We found ; that the measured acetaldehyde-to-toluene emission ratio was about a factor of 8 greater than the emission ratio used in ; MOVES2014. Measured formaldehyde-to-toluene emission ratios were a factor of 5 greater. Our study suggests that emission of the ; air toxics acetaldehyde and, likely, formaldehyde is significantly underestimated in wintertime by the MOVES2014 model.
Format:

PDF
Funding:

CESTiCC Project 101409
Download URL:

https://rosap.ntl.bts.gov/view/dot/31464/dot_31464_DS1.pdf
File Type:

[PDF - 1.17 MB]
Collection(s):

US Transportation Collection
Main Document Checksum:

urn:sha256:34a81c65729ed19314b1040552d6a269716bf7e8409ef639e96a299eef00bffb

File Language:

English

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