Siti Zubaidah, Sulaiman and Nur Aqidah, Muhammad Harinder Khan and Izirwan, Izhab and Shalyda, Md Shaarani and Siti Kholijah, Abdul Mudalip and Rohaida, Che Man and Zatul Iffah, Mohd Arshad and Rafiziana, Md. Kasmani and Sarina, Sulaiman (2020) Explosion characteristics assessment of premixed biogas/air mixture in a 20-L spherical vessel. Chemical Engineering Communications, 208 (4). 583 -591. ISSN 0098-6445 (print); 1563-5201 (online). (Published)
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Abstract
The understanding of biogas explosion characteristics is needed to describe the severity of the explosion. Biogas is a flammable gas and will explode when ignited. This study reports the experimental results on biogas explosion characteristics in a standard 20-L spherical vessel under quiescent conditions using electric spark (10 J) as an ignition source. Computational Fluid Dynamic (CFD) code FLame ACcelaration Simulator (FLACs) was used to simulate the biogas explosion based on the experimental case study. The dependence of explosion characteristics such as explosion pressure (Pmax), rate of pressure rise (dP/dt), and deflagration index (KG), on biogas concentration and carbon dioxide, CO2 composition is demonstrated. The data allow for the evaluation of the potential severity of biogas explosion, which in turn helps engineers design the explosion mitigation and prevention device related to this gas. The experimental data reported from this study concluded that Pmax = 8–8.50 bar, the dP/dt = 100–400 bar/ms and the KG = 32.7–121 bar m/ms were recorded at equivalence ratio, (ER) = 1.2 with CO2 composition in the biogas = 30% vol/vol. It was found that the severity of the biogas explosion increased proportionally with the biogas concentration. On the contrary, the explosive intensity was weakened by increasing the CO2 concentration due to the physical effects of CO2 and thermal instability. This study also recorded that the biogas explosion was categorized under hazard level = St-3 indicating a catastrophic explosion. These data are important for preventing and mitigating the biogas explosion.
| Item Type: | Article |
|---|---|
| Additional Information: | Indexed by Scopus |
| Uncontrolled Keywords: | Biogas; Deflagration index; Explosion pressure; Maximum explosion overpressure; Maximum rate of pressure rise |
| Subjects: | T Technology > TP Chemical technology |
| Faculty/Division: | Institute of Postgraduate Studies Faculty of Chemical and Process Engineering Technology |
| Depositing User: | Mrs Norsaini Abdul Samat |
| Date Deposited: | 01 Mar 2022 07:42 |
| Last Modified: | 01 Mar 2022 07:42 |
| URI: | http://umpir.ump.edu.my/id/eprint/32039 |
| Download Statistic: | View Download Statistics |
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