Effect of film thickness and methane fraction on explosion characteristics of biogas/air mixture in a duct

Zhang, Dou; Zheng, Ligang; Zheng, Kai; Pan, Rongkun; Yang, Joey; Fu, Yuanpeng

doi:10.1016/j.psep.2020.04.006

Cited by 29 publications

(2 citation statements)

References 65 publications

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“…Scientific contributions regarding biogas explosions are available in the literature [12][13][14][15][16][17][18][19]. Some of them report values of flammability parameters of synthetic biogas (flammability limits, limiting oxygen concentration, maximum explosion pressure and maximum rate of pressure rise) [14,15], while others report laminar burning velocities from measurements or kinetic modelling [17,[20][21][22][23][24].…”

Section: Introductionmentioning

confidence: 99%

Laminar Burning Velocity of Biogas-Containing Mixtures. A Literature Review

et al. 2021

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Currently, the use of fossil fuels is very high and existing nature reserves are rapidly depleted. Therefore, researchers are turning their attention to find renewable fuels that have a low impact on the environment, to replace these fossil fuels. Biogas is a low-cost alternative, sustainable, renewable fuel existing worldwide. It can be produced by decomposition of vegetation or waste products of human and animal biological activity. This process is performed by microorganisms (such as methanogens and sulfate-reducing bacteria) by anaerobic digestion. Biogas can serve as a basis for heat and electricity production used for domestic heating and cooking. It can be also used to feed internal combustion engines, gas turbines, fuel cells, or cogeneration systems. In this paper, a comprehensive literature study regarding the laminar burning velocity of biogas-containing mixtures is presented. This study aims to characterize the use of biogas as IC (internal combustion) engine fuel, and to develop efficient safety recommendations and to predict and reduce the risk of fires and accidental explosions caused by biogas.

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Section: Introductionmentioning

confidence: 99%

Laminar Burning Velocity of Biogas-Containing Mixtures. A Literature Review

et al. 2021

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“…Researchers studied a great deal about flame propagation, and most of this research was conducted for methane, − ethane, propane, hydrogen, and methanol . There are many studies conducted to investigate the burning velocities of binary fuel mixtures, such as CH 4 –CO 2 , , H 2 –CH 4 , , CH 4 –C 2 H 4 , CH 4 –C 2 H 6 , iso-octane-methane, , natural gas–H 2 , LPG–H 2, biogas–H 2 , and H 2 –CO, , due to the new interest in the utilization of substitute fuels.…”

Section: Introductionmentioning

confidence: 99%

Effects of Initial Temperature on the Deflagration Characteristics and Flame Propagation Behaviors of CH₄ and Its Blends with C₂H₆, C₂H₄, CO, and H₂

et al. 2020

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An experimental study was performed on pressure evolution and flame propagation for CH4 and its blends with C2H6, C2H4, CO, and H2 over its entire flammable range for systems with various concentrations (0.4–2.0 %) and initial temperatures (298–373 K) of closed-vessel deflagration. The peak explosion pressure (P max) and the maximum pressure rise rate (dp/dt)max were observed and analyzed. In the outwardly spherically propagating flame method, the unstretched laminar burning velocity (U l) was obtained from the flame radius with time. Within the range of the experiments, the results show that P max decreases linearly and that (dp/dt)max first increases and then decreases with increasing initial temperature at a constant initial concentration. When a gas mixture is added to a 9.5 % CH4–air mixture, P max and (dp/dt)max exhibit decreasing trends at a constant initial temperature. A nonlinear regression formula was obtained, and this formula can be used to predict P max at different temperatures and concentrations. The kinetic model using two detailed mechanisms (GRI-Mech 3.0, FFCM-1) is compared with the experimental results using linear and nonlinear models of stretch extrapolation. The laminar burning velocities (LBVs) measured by FFCM-1 are closer to the experimental value than those measured by GRI-Mech 3.0. The U l values of CH4 and its blends with C2H6, C2H4, CO, and H2 increase with an increase in the initial temperature. Based on the analysis of experimental values, the temperature exponent (α) is derived to predict the LBVs of the mixture at an elevated temperature under atmospheric pressure.

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Effect of initial temperature and H2 addition on explosion characteristics of H2-poor/CH4/air mixtures

Luo

Wang

et al. 2020

Energy

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Effect of film thickness and methane fraction on explosion characteristics of biogas/air mixture in a duct

Cited by 29 publications

References 65 publications

Laminar Burning Velocity of Biogas-Containing Mixtures. A Literature Review

Laminar Burning Velocity of Biogas-Containing Mixtures. A Literature Review

Effects of Initial Temperature on the Deflagration Characteristics and Flame Propagation Behaviors of CH₄ and Its Blends with C₂H₆, C₂H₄, CO, and H₂

Effect of initial temperature and H2 addition on explosion characteristics of H2-poor/CH4/air mixtures

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Effect of film thickness and methane fraction on explosion characteristics of biogas/air mixture in a duct

Cited by 29 publications

References 65 publications

Laminar Burning Velocity of Biogas-Containing Mixtures. A Literature Review

Laminar Burning Velocity of Biogas-Containing Mixtures. A Literature Review

Effects of Initial Temperature on the Deflagration Characteristics and Flame Propagation Behaviors of CH4 and Its Blends with C2H6, C2H4, CO, and H2

Effect of initial temperature and H2 addition on explosion characteristics of H2-poor/CH4/air mixtures

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Effects of Initial Temperature on the Deflagration Characteristics and Flame Propagation Behaviors of CH₄ and Its Blends with C₂H₆, C₂H₄, CO, and H₂