Experimental study on methane-air mixtures explosion limits at normal and elevated initial temperatures and pressures

Gao Na; Zhang Yansong; Hu Yiting

doi:10.11883/1001-1455(2017)03-0453-06

Volume 37 Issue 3

Apr. 2017

Turn off MathJax

Article Contents

Article Navigation > Explosion And Shock Waves > 2017 > 37(3): 453-458

Gao Na, Zhang Yansong, Hu Yiting. Experimental study on methane-air mixtures explosion limits at normal and elevated initial temperatures and pressures[J]. Explosion And Shock Waves, 2017, 37(3): 453-458. doi: 10.11883/1001-1455(2017)03-0453-06

Citation:

Gao Na, Zhang Yansong, Hu Yiting. Experimental study on methane-air mixtures explosion limits at normal and elevated initial temperatures and pressures[J]. Explosion And Shock Waves, 2017, 37(3): 453-458. doi: 10.11883/1001-1455(2017)03-0453-06

Citation:

PDF( 2535 KB)

Experimental study on methane-air mixtures explosion limits at normal and elevated initial temperatures and pressures

doi: 10.11883/1001-1455(2017)03-0453-06

1.
School of Chemical Engineering, Nanjing University of Science and Technology, Nanjing 210094, Jiangsu, China
2.
Chongqing Research Institute, China Coal Technology and Engineering Group Corporation, Chongqing 400037, China

Received Date: 2015-10-26
Rev Recd Date: 2015-12-08
Publish Date: 2017-05-25

Abstract

Abstract

In order to study the influence of initial conditions on methane-air mixtures explosion limits, the explosion limits of methane-air mixtures were obtained experimentally at different initial temperatures up to 200 ℃ and initial pressures up to 1.0 MPa. The experiments were performed in a closed spherical 20 dm³ vessel with an ignition electrode at the center. The results show that with the increasing of initial temperature and initial pressure, the upper explosion limit increases, but the lower explosion limit decreases, that is the explosion limit expands. At atmospheric pressure/ambient temperature, the dependences of the upper explosion limit and lower explosion limit on initial temperature and initial pressure are both linear in the experimental temperature-pressure ranges. The dependence of the upper explosion limit on initial temperature/initial pressure is influenced by the initial pressure/initial temperature, but the dependence of the lower explosion limit on those is not influenced obviously. The coupling effects of initial temperature and initial pressure on the upper explosion limit and lower explosion limit are greater than that of a single factor, especially on the upper explosion limit. Surfaces are formed to describe how the initial temperature and initial pressure influence the upper explosion limit and the lower explosion limit of methane-air mixtures.
- explosion limits,
- initial pressure,
- initial temperature,
- methane-air mixtures

FullText(HTML)

References(14)

References

[1]	Coronado C J, Carvalho J A Jr, Andrade J C, et al.Flammability limits:A review with emphasis on ethanol for aeronautical applications and description of the experimental procedure[J].Journal of Hazardous Materials, 2012, 241-242:32-54. doi: 10.1016/j.jhazmat.2012.09.035
[2]	Van den Schoor F, Verplaetsen F, Berghmans J.Calculation of the upper flammability limit of methane/hydrogen/air mixtures at elevated pressures and temperature[J].International Journal of Hydrogen Energy, 2008, 33(4):1399-1406. doi: 10.1016/j.ijhydene.2008.01.002
[3]	Van den Schoor F, Verplaetsen F, Berghmans J.Calculation of the upper flammability limit of methane/air mixtures at elevated pressures and temperatures[J].Journal of Hazardous Materials, 2008, 153(3):1301-1307. doi: 10.1016/j.jhazmat.2007.09.088
[4]	Van den Schoor F, Hermanns R TE, Van Oijen J A, et al.Comparison and evaluation of methods for the determination of flammability limits, applied to methane/hydrogen/air mixtures[J].Journal of Hazardous Materials, 2008, 150(3):573-581. doi: 10.1016/j.jhazmat.2007.05.006
[5]	Coward H F, Jones G W.Limits of flammability of gases and vapors[M].Washington:United States Government Printing Office, 1952:37-41.
[6]	Zabetakis M G.Flammability characteristics of combustible gases and vapors[M].Washington:United States Government Printing Office, 1965:20-27.
[7]	Cashdollar K L, Zlochower I A, Green G M, et al.Flammability of methane, propane, and hydrogen gases[J].Journal of Loss Prevention in the Process Industries, 2000, 13(3/4/5):327-340. http://www.sciencedirect.com/science/article/pii/S0950423099000376
[8]	Wierzba I, Ale B B.Rich flammability limits of fuel mixture involving hydrogen at elevated temperature[J].International Journal of Hydrogen Energy, 2000, 25(1):75-80. doi: 10.1016/S0360-3199(99)00009-9
[9]	Gieras M, Klemens R, Rarata G, et al.Determination of explosion parameters of methane-air mixtures in the chamber of 40 dm³ at normal and elevated temperature[J].Journal of Loss Prevention in the Process Industries, 2006, 19(2/3):263-270. http://www.wanfangdata.com.cn/details/detail.do?_type=perio&id=d4c91882e6c30ee838be2c12bc6d4931
[10]	Cooper C M, Wiezevich P J.Effects of temperature and pressure on the upper explosion limit of methane-oxygen mixtures[J].Journal of Industrial and Engineering Chemistry, 1929, 21(12):1210-1214. doi: 10.1021/ie50240a014
[11]	Vanderstraeten B, Tuerlinckx D, Berghmans J, et al.Experimental study of the pressure and temperature dependence on the upper flammability limit of methane/air mixtures[J].Journal of Hazardous Materials, 1997, 56(3):237-246. doi: 10.1016/S0304-3894(97)00045-9
[12]	Van den Schoor F, Verplaetsen F.The upper explosion limit of lower alkanes and alkenes in air at elevated pressure and temperature[J].Journal of Hazardous Materials, 2006, 128(1):1-9. doi: 10.1016/j.jhazmat.2005.06.043
[13]	Van den Schoor F, Verplaetsen F.The upper flammability limit of methane/hydrogen/air mixtures at elevated pressure and temperatures[J].International Journal of Hydrogen Energy, 2008, 32(13):2548-2552. http://www.wanfangdata.com.cn/details/detail.do?_type=perio&id=d29ed8e4047b8942cbe024fb139ff2b9
[14]	ASTM International.Standard test methods for limiting oxygen (oxidant) concentration in gases and vapors:ASTM E2079-07[S].American Society for Testing and Materials, 2013:1-2.