Numerical simulation on the rffect of concentration on premixed ch4/co2/air explosion characteristics

In this study, a numerical simulation on the premixed CH4/CO2/air (methane/carbon dioxide/air)mixture explosion characteristics was conducted by using the FLame ACcelaration Simulator (FLACs) software. The domain used in the 20 L spherical vessel with 0.808 m diameter. The effect of various equivale...

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Main Authors:	Nur Aqidah, Muhammad Harinder Khan, Siti Zubaidah, Sulaiman, Izirwan, Izhab, Siti Kholijah, Abdul Mudalip, Rohaida, Che Man, Shalyda, Md Shaarani, Zatul Iffah, Mohd Arshad, Rafiziana, Md Kasman, Sarina, Sulaiman
Format:	Article
Language:	English
Published:	Universiti Malaysia Pahang 2019
Subjects:	TP Chemical technology
Online Access:	http://umpir.ump.edu.my/id/eprint/26008/ http://umpir.ump.edu.my/id/eprint/26008/ http://umpir.ump.edu.my/id/eprint/26008/ http://umpir.ump.edu.my/id/eprint/26008/1/9.%20Numerical%20simulation%20on%20the%20rffect%20of%20concentration.pdf

id	ump-26008
recordtype	eprints
spelling	ump-260082019-11-21T08:05:19Z http://umpir.ump.edu.my/id/eprint/26008/ Numerical simulation on the rffect of concentration on premixed ch4/co2/air explosion characteristics Nur Aqidah, Muhammad Harinder Khan Siti Zubaidah, Sulaiman Izirwan, Izhab Siti Kholijah, Abdul Mudalip Rohaida, Che Man Shalyda, Md Shaarani Zatul Iffah, Mohd Arshad Rafiziana, Md Kasman Sarina, Sulaiman TP Chemical technology In this study, a numerical simulation on the premixed CH4/CO2/air (methane/carbon dioxide/air)mixture explosion characteristics was conducted by using the FLame ACcelaration Simulator (FLACs) software. The domain used in the 20 L spherical vessel with 0.808 m diameter. The effect of various equivalence ratios on the explosion characteristics such as the explosion pressure, Pex, maximum explosion overpressure, Pmax, the maximum rate of pressure rise, (dP/dt)max and gas deflagration index, KG, were studied. For this purpose, the mixture concentrations range from equivalence ratio (ER) 0.8 to 1.5 (9.6 to 18% vol/vol) were considered. From this study, the explosion pressure, Pex, maximum explosion overpressure, Pmax, and the maximum rate of pressure rise, (dP/dt)max, at various ER was the maximum at a slightly rich concentration (ER=1.2). At lean and rich mixtures, the Pex, Pmax, (dP/dt)max and KG decreases. It can be said that, at ER=1.2, the role of thermal-diffusive instability and its effect on the flame speed during the pressure development process had causes the diffused methane, CH4, to react further into the flame front, which significantly increases the mixture mass burning rate and flame speed thus improving the mixture explosion characteristics. From this study, the flame was also found to propagates the fastest at ER=1.2 due to the incomplete combustion process caused by the insufficient and excess CH4 present in the lean and rich mixtures. The CH4/CO2/air mixtures studied in this study were also found to have the highest level of hazard potential when exploded. Universiti Malaysia Pahang 2019 Article PeerReviewed pdf en http://umpir.ump.edu.my/id/eprint/26008/1/9.%20Numerical%20simulation%20on%20the%20rffect%20of%20concentration.pdf Nur Aqidah, Muhammad Harinder Khan and Siti Zubaidah, Sulaiman and Izirwan, Izhab and Siti Kholijah, Abdul Mudalip and Rohaida, Che Man and Shalyda, Md Shaarani and Zatul Iffah, Mohd Arshad and Rafiziana, Md Kasman and Sarina, Sulaiman (2019) Numerical simulation on the rffect of concentration on premixed ch4/co2/air explosion characteristics. Journal of Chemical Engineering and Industrial Biotechnology (JCEIB), 5 (5). pp. 39-47. ISSN 0126-8139 https://jceib.ump.edu.my/index.php/en/volume-5-docman/113-numerical-simulation-on-the-rffect-of-concentration-on-premixed-ch4-co2-air-explosion-characteristics https://doi.org/10.15282/JCEIB-V5-04.29/3/2019/5.5
repository_type	Digital Repository
institution_category	Local University
institution	Universiti Malaysia Pahang
building	UMP Institutional Repository
collection	Online Access
language	English
topic	TP Chemical technology
spellingShingle	TP Chemical technology Nur Aqidah, Muhammad Harinder Khan Siti Zubaidah, Sulaiman Izirwan, Izhab Siti Kholijah, Abdul Mudalip Rohaida, Che Man Shalyda, Md Shaarani Zatul Iffah, Mohd Arshad Rafiziana, Md Kasman Sarina, Sulaiman Numerical simulation on the rffect of concentration on premixed ch4/co2/air explosion characteristics
description	In this study, a numerical simulation on the premixed CH4/CO2/air (methane/carbon dioxide/air)mixture explosion characteristics was conducted by using the FLame ACcelaration Simulator (FLACs) software. The domain used in the 20 L spherical vessel with 0.808 m diameter. The effect of various equivalence ratios on the explosion characteristics such as the explosion pressure, Pex, maximum explosion overpressure, Pmax, the maximum rate of pressure rise, (dP/dt)max and gas deflagration index, KG, were studied. For this purpose, the mixture concentrations range from equivalence ratio (ER) 0.8 to 1.5 (9.6 to 18% vol/vol) were considered. From this study, the explosion pressure, Pex, maximum explosion overpressure, Pmax, and the maximum rate of pressure rise, (dP/dt)max, at various ER was the maximum at a slightly rich concentration (ER=1.2). At lean and rich mixtures, the Pex, Pmax, (dP/dt)max and KG decreases. It can be said that, at ER=1.2, the role of thermal-diffusive instability and its effect on the flame speed during the pressure development process had causes the diffused methane, CH4, to react further into the flame front, which significantly increases the mixture mass burning rate and flame speed thus improving the mixture explosion characteristics. From this study, the flame was also found to propagates the fastest at ER=1.2 due to the incomplete combustion process caused by the insufficient and excess CH4 present in the lean and rich mixtures. The CH4/CO2/air mixtures studied in this study were also found to have the highest level of hazard potential when exploded.
format	Article
author	Nur Aqidah, Muhammad Harinder Khan Siti Zubaidah, Sulaiman Izirwan, Izhab Siti Kholijah, Abdul Mudalip Rohaida, Che Man Shalyda, Md Shaarani Zatul Iffah, Mohd Arshad Rafiziana, Md Kasman Sarina, Sulaiman
author_facet	Nur Aqidah, Muhammad Harinder Khan Siti Zubaidah, Sulaiman Izirwan, Izhab Siti Kholijah, Abdul Mudalip Rohaida, Che Man Shalyda, Md Shaarani Zatul Iffah, Mohd Arshad Rafiziana, Md Kasman Sarina, Sulaiman
author_sort	Nur Aqidah, Muhammad Harinder Khan
title	Numerical simulation on the rffect of concentration on premixed ch4/co2/air explosion characteristics
title_short	Numerical simulation on the rffect of concentration on premixed ch4/co2/air explosion characteristics
title_full	Numerical simulation on the rffect of concentration on premixed ch4/co2/air explosion characteristics
title_fullStr	Numerical simulation on the rffect of concentration on premixed ch4/co2/air explosion characteristics
title_full_unstemmed	Numerical simulation on the rffect of concentration on premixed ch4/co2/air explosion characteristics
title_sort	numerical simulation on the rffect of concentration on premixed ch4/co2/air explosion characteristics
publisher	Universiti Malaysia Pahang
publishDate	2019
url	http://umpir.ump.edu.my/id/eprint/26008/ http://umpir.ump.edu.my/id/eprint/26008/ http://umpir.ump.edu.my/id/eprint/26008/ http://umpir.ump.edu.my/id/eprint/26008/1/9.%20Numerical%20simulation%20on%20the%20rffect%20of%20concentration.pdf
first_indexed	2023-09-18T22:40:13Z
last_indexed	2023-09-18T22:40:13Z
_version_	1777416865240317952

Numerical simulation on the rffect of concentration on premixed ch4/co2/air explosion characteristics

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