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Promoted selection non-catalytic reduction: prospective technology for nitrogen oxide reduction

Promoted selective non-catalytic reduction (SNCR) of nitric oxide (No) has been studied experimentally by injecting aqueous urea solution with and without additive in a pilot-scale diesel-fired tunnel furnace at 3-4 %excess oxygen level and with low ppm of baseline NO~ ranging from 65 to 75 ppm with...

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Main Authors: Abu Hossain, Khandoker, Mohd. Jaajar, Mohammad Nazri, Ani, Farid Nasir
Format: Article
Published: Gadjah Mada University 2004
Subjects:
TJ Mechanical engineering and machinery
Online Access:http://eprints.utm.my/id/eprint/28195/
https://jurnal.ugm.ac.id/AJChE/article/view/50845
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spelling my.utm.281952022-01-31T08:37:53Z http://eprints.utm.my/id/eprint/28195/ Promoted selection non-catalytic reduction: prospective technology for nitrogen oxide reduction Abu Hossain, Khandoker Mohd. Jaajar, Mohammad Nazri Ani, Farid Nasir TJ Mechanical engineering and machinery Promoted selective non-catalytic reduction (SNCR) of nitric oxide (No) has been studied experimentally by injecting aqueous urea solution with and without additive in a pilot-scale diesel-fired tunnel furnace at 3-4 %excess oxygen level and with low ppm of baseline NO~ ranging from 65 to 75 ppm within the investigated temperature range. The tests were carried out using commercial grade urea as NOx-reducing agent and commercial grade sodium carbonate (NaZC03 ) as additive. The furnace simulated the small-scale combustion systems where (a) operating temperatures are usually within 973-1,323 K and [b] NO,-emission level remains below 100 ppm. In the SNCR process with 5% urea solution, at normalized stoichiometric ratio (NSR) of 4, as much as 54% reduction was achieved at 1.128 K; while in the promoted SNCR process using Na2CO:;additive, NO~ reduction improved to as much as 69% at 1,093 K In addition, the effective temperature window as well as peak temperature of NO reduction shifted towards lower temperatures in promoted SNCR. These results were significant especially for the investigated level of baseline NO". The ammonia slip measurements showed that in both cases the slip was below 16 ppm at an NSR of 4 and an optimum temperature of NO", reduction. The investigations demonstrated that urea-based promoted SNCR may be used for small-scale combustion applications and that commercial grade Na"C03 is a potential additive. Gadjah Mada University 2004 Article PeerReviewed Abu Hossain, Khandoker and Mohd. Jaajar, Mohammad Nazri and Ani, Farid Nasir (2004) Promoted selection non-catalytic reduction: prospective technology for nitrogen oxide reduction. Asean Journal of Chemical Engineering, 4 (1). pp. 19-24. ISSN 1655-4418 https://jurnal.ugm.ac.id/AJChE/article/view/50845
institution Universiti Teknologi Malaysia
building UTM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Teknologi Malaysia
content_source UTM Institutional Repository
url_provider http://eprints.utm.my/
topic TJ Mechanical engineering and machinery
spellingShingle TJ Mechanical engineering and machinery
Abu Hossain, Khandoker
Mohd. Jaajar, Mohammad Nazri
Ani, Farid Nasir
Promoted selection non-catalytic reduction: prospective technology for nitrogen oxide reduction
description Promoted selective non-catalytic reduction (SNCR) of nitric oxide (No) has been studied experimentally by injecting aqueous urea solution with and without additive in a pilot-scale diesel-fired tunnel furnace at 3-4 %excess oxygen level and with low ppm of baseline NO~ ranging from 65 to 75 ppm within the investigated temperature range. The tests were carried out using commercial grade urea as NOx-reducing agent and commercial grade sodium carbonate (NaZC03 ) as additive. The furnace simulated the small-scale combustion systems where (a) operating temperatures are usually within 973-1,323 K and [b] NO,-emission level remains below 100 ppm. In the SNCR process with 5% urea solution, at normalized stoichiometric ratio (NSR) of 4, as much as 54% reduction was achieved at 1.128 K; while in the promoted SNCR process using Na2CO:;additive, NO~ reduction improved to as much as 69% at 1,093 K In addition, the effective temperature window as well as peak temperature of NO reduction shifted towards lower temperatures in promoted SNCR. These results were significant especially for the investigated level of baseline NO". The ammonia slip measurements showed that in both cases the slip was below 16 ppm at an NSR of 4 and an optimum temperature of NO", reduction. The investigations demonstrated that urea-based promoted SNCR may be used for small-scale combustion applications and that commercial grade Na"C03 is a potential additive.
format Article
author Abu Hossain, Khandoker
Mohd. Jaajar, Mohammad Nazri
Ani, Farid Nasir
author_facet Abu Hossain, Khandoker
Mohd. Jaajar, Mohammad Nazri
Ani, Farid Nasir
author_sort Abu Hossain, Khandoker
title Promoted selection non-catalytic reduction: prospective technology for nitrogen oxide reduction
title_short Promoted selection non-catalytic reduction: prospective technology for nitrogen oxide reduction
title_full Promoted selection non-catalytic reduction: prospective technology for nitrogen oxide reduction
title_fullStr Promoted selection non-catalytic reduction: prospective technology for nitrogen oxide reduction
title_full_unstemmed Promoted selection non-catalytic reduction: prospective technology for nitrogen oxide reduction
title_sort promoted selection non-catalytic reduction: prospective technology for nitrogen oxide reduction
publisher Gadjah Mada University
publishDate 2004
url http://eprints.utm.my/id/eprint/28195/
https://jurnal.ugm.ac.id/AJChE/article/view/50845
_version_ 1724073255467220992
score 13.211869

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