On-road measurement of NH3 and N2O emissions from a Euro V heavy-duty vehicle. (August 2016)

• Record Type: Journal Article
• Authors: Suarez-Bertoa, Ricardo; Mendoza-Villafuerte, Pablo; Bonnel, Pierre; Lilova, Velizara; Hill, Leslie; Perujo, Adolfo; Astorga, Covadonga
• Is Part Of: Atmospheric environment. Volume 139(2016)
• Page Start: 167
• Page End: 175
• Publication Date: 2016-08
• Subjects: Ammonia -- Nitrous oxide -- Vehicle emissions -- PEMS -- QCL-IR -- Real driving emissions; Air -- Pollution -- Periodicals; Air -- Pollution -- Meteorological aspects -- Periodicals; 551.51
• DOI: 10.1016/j.atmosenv.2016.04.035
• Languages: English
• ISSNs: 1352-2310

Abstract

Abstract: The use of selective catalytic reduction systems (SCR) to abate NOx vehicular emissions brings new concerns on the emissions of the byproducts NH3 and N2 O. Therefore, NH3 and N2 O on-road emissions from a Euro V truck equipped with a SCR were measured in real time using a QCL-IR. Results bring to light possibility to perform this kind of real time measurements for other pollutants besides, hydrocarbons, NOx, CO and CO2 . The capability to measure NH3 and N2 O in a second-by-second basis will allow applying the currently agreed regulatory emissions evaluation for gaseous compounds. Average N2 O emission factors calculated applying the current PEMS-based data analysis to all available windows from the tests ranged from 0.063 g/kWh to 0.139 g/kWh. Average NH3 concentrations ranged from 0.9 ppm to 5.7 ppm. Although calculated average N2 O and NH3 emissions were within current limits, NOx emissions were substantially higher than Euro V limits under the studied conditions. Highlights: NH3 and N2 O on-road emissions can be measured using a QCL-IR. Substantial NH3 and N2 O emissions were observed. Current regulatory emissions evaluation for HD could be applied for NH3 and N2 O.