The use of selective catalytic reduction systems (SCR) to abate NOx vehicular emissions brings new concerns on the emissions of the byproducts NH3 and N2O. Therefore, NH3 and N2O 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 N2O in a second-by-second basis will allow applying the currently agreed regulatory emissions evaluation for gaseous compounds. Average N2O 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 N2O and NH3 emissions were within current limits, NOx emissions were substantially higher than Euro V limits under the studied conditions.

SUAREZ BERTOA Ricardo;  MENDOZA VILLAFUERTE Pablo;  BONNEL Pierre;  LILOVA Velizara;  HILL Leslie;  PERUJO MATEOS DEL PARQUE Adolfo;  ASTORGA-LLORENS Maria; 

2016-05-30

PERGAMON PRESS LTD.

JRC97804

0004-6981,   

http://www.sciencedirect.com/science/article/pii/S1352231016303181,    https://publications.jrc.ec.europa.eu/repository/handle/JRC97804,   

10.1016/j.atmosenv.2016.04.035,