COMPARISON OF PARTIAL AND TOTAL DILUTION SYSTEMS FOR THE MEASUREMENT OF POLYCYCLIC AROMATIC HYDROCARBONS AND HYDROCARBON SPECIATION IN DIESEL EXHAUST Southwest Research Institute

Format:

Book

Conference/Event

Author/Creator:

Fanick, E. Robert, author.

Contributor:

Premnath, Vinay

Conference Name:

SAE Powertrains, Fuels & Lubricants Meeting (2020-09-22 : Krakow, Poland)

Language:

English

Physical Description:

1 online resource cm

Place of Publication:

Warrendale, PA SAE International 2020

Summary:

There are two methods of sampling exhaust emissions: total dilution using a constant volume sampling (CVS) system and partial flow dilution by proportionally diluting a small part from the main exhaust stream. The CVS dilutes the entire exhaust flow to a constant volumetric flowrate which allows for proportional sampling of the exhaust species during transient engine operation. For partial dilution sampling during transient engine operation, obtaining a proportional sample is more rigorous and the proportionality of the sample must be continuously changed throughout the cycle in order to be proportional to the overall continuously-changing exhaust flow. For this study, a Sierra Instruments BG-3 Partial Flow Sampling Cart (BG-3) and a standard CVS were used to compare the measurements for polycyclic aromatic hydrocarbons (PAH) and hydrocarbon speciation of compounds from methane to dodecane including aldehydes and ketones in diesel exhaust. Engine-out emissions from a 2016 12.4L Navistar without aftertreatment were sampled with both dilution systems, and samples for PAH and hydrocarbon speciation were collected and analyzed. A comparison of these two different dilution systems demonstrated that the BG-3 produced similar results for both the regulated and the unregulated emissions when compared to the CVS

Notes:

Vendor supplied data

Publisher Number:

2020-01-2190

Access Restriction:

Restricted for use by site license