Effect of inhibitor gases on hydrogen flame propagation in a confined tee pipe (Part I)

Hydrogen is a promising fuel for the future. In recent years it has been successfully utilised in industries, particularly in refineries and petrochemicals. In previous studies, the effect of inhibitors on hydrogen explosion behaviour has been investigated in different systems, yet only scarce data...

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Main Authors: Emami, Sina Davazdah, Kasmani, Rafiziana Md., Hamid, Mahar Diana, Cha Hassan, Che Rosmani, Sulaiman, Siti Zubaidah
Format: Article
Published: Elsevier Ltd 2016
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Online Access:http://eprints.utm.my/id/eprint/69281/
http://dx.doi.org/10.1016/j.fuel.2015.10.025
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spelling my.utm.692812017-11-22T00:45:09Z http://eprints.utm.my/id/eprint/69281/ Effect of inhibitor gases on hydrogen flame propagation in a confined tee pipe (Part I) Emami, Sina Davazdah Kasmani, Rafiziana Md. Hamid, Mahar Diana Cha Hassan, Che Rosmani Sulaiman, Siti Zubaidah TP Chemical technology Hydrogen is a promising fuel for the future. In recent years it has been successfully utilised in industries, particularly in refineries and petrochemicals. In previous studies, the effect of inhibitors on hydrogen explosion behaviour has been investigated in different systems, yet only scarce data are available. Therefore, experimental study is carried out to investigate the effects of argon, nitrogen and carbon dioxide on hydrogen/air explosion in a branched pipe configuration. The fuel/air mixtures were ignited at three different ignition positions, A, B and D. The results show that, when ignited at the furthest distance (position A), the tee junction area is most vulnerable to the critical pressure impact of gas explosion. However, no similar trend was observed at the other ignition positions. In addition, mixtures with the compositions 95% H-2-2.5% Ar-2.5% N-2/air, 95% H-2-5% N-2/air, H-2/air and 95% H-2-5% Ar/air showed higher risks due to the higher diffusivity ratio and the associated rate of pressure rise. This phenomenon is highlighted in the discussion part of this paper. The results show that mixtures with CO2 lead to lower severity than other compositions (similar to 50% reduction), as the average recorded maximum flame speed for this particular mixture was lower at all of the ignition points. This suggests that the effectiveness of the inhibitors should be in the order of Ar < N-2 < CO2. Elsevier Ltd 2016 Article PeerReviewed Emami, Sina Davazdah and Kasmani, Rafiziana Md. and Hamid, Mahar Diana and Cha Hassan, Che Rosmani and Sulaiman, Siti Zubaidah (2016) Effect of inhibitor gases on hydrogen flame propagation in a confined tee pipe (Part I). Fuel, 165 . pp. 50-58. ISSN 0016-2361 http://dx.doi.org/10.1016/j.fuel.2015.10.025 DOI:10.1016/j.fuel.2015.10.025
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 TP Chemical technology
spellingShingle TP Chemical technology
Emami, Sina Davazdah
Kasmani, Rafiziana Md.
Hamid, Mahar Diana
Cha Hassan, Che Rosmani
Sulaiman, Siti Zubaidah
Effect of inhibitor gases on hydrogen flame propagation in a confined tee pipe (Part I)
description Hydrogen is a promising fuel for the future. In recent years it has been successfully utilised in industries, particularly in refineries and petrochemicals. In previous studies, the effect of inhibitors on hydrogen explosion behaviour has been investigated in different systems, yet only scarce data are available. Therefore, experimental study is carried out to investigate the effects of argon, nitrogen and carbon dioxide on hydrogen/air explosion in a branched pipe configuration. The fuel/air mixtures were ignited at three different ignition positions, A, B and D. The results show that, when ignited at the furthest distance (position A), the tee junction area is most vulnerable to the critical pressure impact of gas explosion. However, no similar trend was observed at the other ignition positions. In addition, mixtures with the compositions 95% H-2-2.5% Ar-2.5% N-2/air, 95% H-2-5% N-2/air, H-2/air and 95% H-2-5% Ar/air showed higher risks due to the higher diffusivity ratio and the associated rate of pressure rise. This phenomenon is highlighted in the discussion part of this paper. The results show that mixtures with CO2 lead to lower severity than other compositions (similar to 50% reduction), as the average recorded maximum flame speed for this particular mixture was lower at all of the ignition points. This suggests that the effectiveness of the inhibitors should be in the order of Ar < N-2 < CO2.
format Article
author Emami, Sina Davazdah
Kasmani, Rafiziana Md.
Hamid, Mahar Diana
Cha Hassan, Che Rosmani
Sulaiman, Siti Zubaidah
author_facet Emami, Sina Davazdah
Kasmani, Rafiziana Md.
Hamid, Mahar Diana
Cha Hassan, Che Rosmani
Sulaiman, Siti Zubaidah
author_sort Emami, Sina Davazdah
title Effect of inhibitor gases on hydrogen flame propagation in a confined tee pipe (Part I)
title_short Effect of inhibitor gases on hydrogen flame propagation in a confined tee pipe (Part I)
title_full Effect of inhibitor gases on hydrogen flame propagation in a confined tee pipe (Part I)
title_fullStr Effect of inhibitor gases on hydrogen flame propagation in a confined tee pipe (Part I)
title_full_unstemmed Effect of inhibitor gases on hydrogen flame propagation in a confined tee pipe (Part I)
title_sort effect of inhibitor gases on hydrogen flame propagation in a confined tee pipe (part i)
publisher Elsevier Ltd
publishDate 2016
url http://eprints.utm.my/id/eprint/69281/
http://dx.doi.org/10.1016/j.fuel.2015.10.025
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score 13.209306