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NOx Emission from Diesel Vehicle with SCR System Failure Characterized Using Portable Emissions Measurement Systems

Author

Listed:
  • Sheng Su

    (Xiamen Environment Protection Vehicle Emission Control Technology Center, Xiamen 361000, China
    National Lab of Auto Performance and Emission Test, School of Mechanical and Vehicular Engineering, Beijing Institute of Technology, Beijing 100081, China)

  • Yunshan Ge

    (Xiamen Environment Protection Vehicle Emission Control Technology Center, Xiamen 361000, China)

  • Yingzhi Zhang

    (School of Environment, Tsinghua University, Beijing 100084, China)

Abstract

Nitrogen oxides (NOx) emissions from diesel vehicles are major contributors to increasing fine particulate matter and ozone levels in China. The selective catalytic reduction (SCR) system can effectively reduce NOx emissions from diesel vehicles and is widely used in China IV and V heavy-duty diesel vehicles (HDDVs). In this study, two China IV HDDVs, one with SCR system failure and the other with a normal SCR system, were tested by using a portable emissions measurement system (PEMS). Results showed that the NOx emission factors of the test vehicle with SCR system failure were 8.42 g/kW∙h, 6.15 g/kW∙h, and 6.26 g/kW∙h at loads of 0%, 50%, and 75%, respectively, which were 2.14, 2.10, and 2.47 times higher than those of normal SCR vehicles. Emission factors, in terms of g/km and g/kW∙h, from two tested vehicles were higher on urban roads than those on suburban and motorways. The NOx emission factor of the vehicle with failed SCR system did not meet the China IV emission standard. The time-weighted results for normal SCR vehicle over the three road types show that, except for NOx emission factor 12.17% higher than the China IV limit at 0% load, the emission values are 16.21% and 27.54% below the China IV standard limit at 50% load and 75% load, respectively. In general, with higher load, NOx emissions (in terms of g/kW∙h) from the tested vehicle decreased. Furthermore, NO/NOx concentrations of both vehicles with normal and failed SCR systems showed a decreasing trend with the increase in load.

Suggested Citation

  • Sheng Su & Yunshan Ge & Yingzhi Zhang, 2021. "NOx Emission from Diesel Vehicle with SCR System Failure Characterized Using Portable Emissions Measurement Systems," Energies, MDPI, vol. 14(13), pages 1-12, July.
  • Handle: RePEc:gam:jeners:v:14:y:2021:i:13:p:3989-:d:587690
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    Citations

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    Cited by:

    1. Sorin Vasile Savu & Robert Cristian Marin & Andrej David & Adrian Bebe Olei & Ilie Dumitru & Daniela Tarnita & Andrea Maternova & Ionel Dănuț Savu, 2022. "Reducing NOx Emissions through Microwave Heating of Aftertreatment Systems for Sustainable Transport in the Inland Waterway Sector," Sustainability, MDPI, vol. 14(7), pages 1-17, March.
    2. Andrzej Ziółkowski & Paweł Fuć & Aleks Jagielski & Maciej Bednarek, 2022. "Analysis of Emissions and Fuel Consumption in Freight Transport," Energies, MDPI, vol. 15(13), pages 1-14, June.
    3. Barouch Giechaskiel & Fabrizio Forloni & Massimo Carriero & Gianmarco Baldini & Paolo Castellano & Robin Vermeulen & Dimitrios Kontses & Pavlos Fragkiadoulakis & Zissis Samaras & Georgios Fontaras, 2022. "Effect of Tampering on On-Road and Off-Road Diesel Vehicle Emissions," Sustainability, MDPI, vol. 14(10), pages 1-18, May.

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