Ammonia measurement issues using quantum cascade laser and two different Fourier transform infrared spectroscopy methods

© 2020 SAE International. All Rights Reserved. Most diesel engine exhausts have been fitted with SCR (Selective Catalyst Reduction) in order to reduce NOX (Oxides of Nitrogen) by using NH3 (ammonia). However, both NOX and NH3 have been classified as compounds hazardous for the environment and human...

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Main Authors:	Nilton Li, Ashraf El-Hamalawi, Richard Barrett, Jim Baxter
Format:	Default Article
Published:	2020
Subjects:	Automotive Engineering Manufacturing Engineering
Online Access:	https://hdl.handle.net/2134/12624710.v1
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spelling	rr-article-126247102020-04-14T00:00:00Z Ammonia measurement issues using quantum cascade laser and two different Fourier transform infrared spectroscopy methods Nilton Li (1250652) Ashraf El-Hamalawi (1258530) Richard Barrett (7177058) Jim Baxter (7179710) Automotive Engineering Manufacturing Engineering © 2020 SAE International. All Rights Reserved. Most diesel engine exhausts have been fitted with SCR (Selective Catalyst Reduction) in order to reduce NOX (Oxides of Nitrogen) by using NH3 (ammonia). However, both NOX and NH3 have been classified as compounds hazardous for the environment and human health. If the reaction between NOX and NH3 is unbalanced during treatment, it can lead to either NOX or NH3 being released into the environment. Accurate measurement is thus necessary. QCL (Quantum Cascade Laser) and FTIR (Fourier Transform InfraRed) are two methods that have been used to measure NH3 and NOX directly in diesel engine exhausts. However, only a few studies have compared those two methods of NH3 measurement, mainly from diesel engine exhausts. The aim of this paper is to compare the QCL and 2 different FTIR specifications for NH3 measurement directly from diesel engine exhausts under well-controlled laboratory conditions. Researchers have found that as NH3 is reactive, it is absorbed inside the exhaust pipe if the probe location is some distance away from the SCR. The results reported here contradict this and show that the probe location has only a small impact on NH3 measurement inside the exhaust pipe. Furthermore, both instruments gave comparable results with the necessary regulatory precision. The outcome from this paper will have an impact on the discipline of NH3 measurement and industry in the way NH3 from diesel engines is measured. 2020-04-14T00:00:00Z Text Journal contribution 2134/12624710.v1 https://figshare.com/articles/journal_contribution/Ammonia_measurement_issues_using_quantum_cascade_laser_and_two_different_Fourier_transform_infrared_spectroscopy_methods/12624710 CC BY-NC-ND 4.0
institution	Loughborough University
collection	Figshare
topic	Automotive Engineering Manufacturing Engineering
spellingShingle	Automotive Engineering Manufacturing Engineering Nilton Li Ashraf El-Hamalawi Richard Barrett Jim Baxter Ammonia measurement issues using quantum cascade laser and two different Fourier transform infrared spectroscopy methods
description	© 2020 SAE International. All Rights Reserved. Most diesel engine exhausts have been fitted with SCR (Selective Catalyst Reduction) in order to reduce NOX (Oxides of Nitrogen) by using NH3 (ammonia). However, both NOX and NH3 have been classified as compounds hazardous for the environment and human health. If the reaction between NOX and NH3 is unbalanced during treatment, it can lead to either NOX or NH3 being released into the environment. Accurate measurement is thus necessary. QCL (Quantum Cascade Laser) and FTIR (Fourier Transform InfraRed) are two methods that have been used to measure NH3 and NOX directly in diesel engine exhausts. However, only a few studies have compared those two methods of NH3 measurement, mainly from diesel engine exhausts. The aim of this paper is to compare the QCL and 2 different FTIR specifications for NH3 measurement directly from diesel engine exhausts under well-controlled laboratory conditions. Researchers have found that as NH3 is reactive, it is absorbed inside the exhaust pipe if the probe location is some distance away from the SCR. The results reported here contradict this and show that the probe location has only a small impact on NH3 measurement inside the exhaust pipe. Furthermore, both instruments gave comparable results with the necessary regulatory precision. The outcome from this paper will have an impact on the discipline of NH3 measurement and industry in the way NH3 from diesel engines is measured.
format	Default Article
author	Nilton Li Ashraf El-Hamalawi Richard Barrett Jim Baxter
author_facet	Nilton Li Ashraf El-Hamalawi Richard Barrett Jim Baxter
author_sort	Nilton Li (1250652)
title	Ammonia measurement issues using quantum cascade laser and two different Fourier transform infrared spectroscopy methods
title_short	Ammonia measurement issues using quantum cascade laser and two different Fourier transform infrared spectroscopy methods
title_full	Ammonia measurement issues using quantum cascade laser and two different Fourier transform infrared spectroscopy methods
title_fullStr	Ammonia measurement issues using quantum cascade laser and two different Fourier transform infrared spectroscopy methods
title_full_unstemmed	Ammonia measurement issues using quantum cascade laser and two different Fourier transform infrared spectroscopy methods
title_sort	ammonia measurement issues using quantum cascade laser and two different fourier transform infrared spectroscopy methods
publishDate	2020
url	https://hdl.handle.net/2134/12624710.v1
_version_	1798818423237509120

Ammonia measurement issues using quantum cascade laser and two different Fourier transform infrared spectroscopy methods

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