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Nitrogen species measurement investigation using two different FTIR

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conference contribution
posted on 08.08.2016, 10:47 by Nilton Li, Ashraf El-HamalawiAshraf El-Hamalawi, Richard Barrett, Andrew D. Wheatley, Jonathan Robinson
Current diesel engine after-treatment systems, such as Selective Catalyst Reduction (SCR), use ammonia (NH3) to reduce the Oxides of Nitrogen (NOx) into Nitrogen (N2) and water; however, if the reaction between ammonia and NOx unbalance this can lead either ammonia or NOx being released into the environment. Ammonia is classified as dangerous compound for the environment; therefore, accurate measurement of ammonia is essential. Fourier Transform Infrared (FTIR) is one of the most common method used to measure raw emissions from engine exhaust pipes, due to its capability to measure multi-type emissions at the same time. However, not many FTIRs that can measure gas from engine exhaust, and most of them has different characteristics and specifications. These can affect the emission measurement from exhaust pipes and lead to uncertainties in meeting compliance demands. The work of this paper compares two FTIR that have different specifications. These FTIRs, have been compared under well controlled laboratory conditions. The concentration of ammonia and NOx from diesel engines has been measured under different engine load and speed. The ammonia readings from each FTIR are plotted into a graph and analysed, the results show that one of the FTIR produces a lower reading compare to the other FTIR. A Chemical Luminance Detector (CLD) was used to measure the NOx and then compared with both FTIRs. After analysed those dataset, the results clearly show the FTIR specification can affect the emission measurement from diesel engines exhaust.

History

School

  • Architecture, Building and Civil Engineering

Published in

18th IASTEM International Conference

Pages

24 - 29

Citation

Li, N. ...et al., 2016. Nitrogen species measurement investigation using two different FTIR. Presented at the 18th IASTEM International Conference, Berlin, Germany, 29 th March, pp. 24-29.

Publisher

International Academy of Science, Technology, Engineering and Management

Version

VoR (Version of Record)

Publisher statement

This work is made available according to the conditions of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0) licence. Full details of this licence are available at: https://creativecommons.org/licenses/by-nc-nd/4.0/

Acceptance date

07/03/2016

Publication date

2016

Notes

This is a conference paper.

ISBN

9789385973857

Language

en

Location

Berlin, Germany