Ignition methane

Violent explosions occur when fluorine directly contacts liquid hydrocarbons, even at —210 with anthracene or turpentine, or solid methane at — 190°C with liquid fluorine. Many lubricants ignite in fluorine [1,2]. Contact and reaction under carefully controlled conditions with catalysis can now be effected smoothly [3], Gaseous hydrocarbons (town gas, methane) ignite in contact with fluorine, and mixtures with unsaturated hydrocarbons (ethylene, acetylene) may explode on exposure to sunlight. Each bubble of fluorine passed through benzene causes ignition, but a rapid stream may lead to explosion [4],... 

Cause 2 filling through vapor phase methane ignited ... 

Novak, T. Fisher, T. J. 2001. Lightning propagation through the earth and its potential for methane ignitions in abandoned areas of underground coal mines. IEEE Transactions on Industry Applications, 37, 1555-1562. 

The constant-pressure formulation results in a high-index problem even with implementation of instead of A as the dependent variable. This results from the absence of any time derivatives for u. Attempts to solve the methane-ignition problem with the constant-pressure formulation were generally unsuccessful, except by significantly relaxing the error control on A and u. Even then, while the solutions appear generally correct, they exhibit unstable behavior near fast transients, particularly on A. 

Activated carbon ignites immediately in the gas, mixtures with methane ignite, and those with carbon monoxide ignite on warming, while those with hydrogen explode on heating or sparking. 

Raimondeau et al. [74] modeled the homogeneous high-temperature combustion of a preheated stoichiometric mixture of methane and air at a flow rate of 2 m s 1 and a reference temperature of1 000 °C, which corresponds to the methane ignition temperature under these conditions. Fora channel of 100 pm diameter, no gradients of species concentration and temperature were determined by the calculations. It was demonstrated that temperature losses through the wall lead to flame extinction, which was more pronounced with decreasing channel diameter. 

M. Frenklach, Systematic Optimization of a Detailed Kinetic Model Using a Methane Ignition Example, Comb, and Flame 58 (1984) 69-72. 

C.Trevino and F. Mendez, Reduced Kinetic Mechanism for Methane Ignition, 24th Symp. (Int.) Comb. (1992) pp. 121-127. 

J. Revel, J.C. Boettner, M. Cathonnet and J.S. Bachman, Derivation of a Global Chemical Kinetic Mechanism for Methane Ignition and Combustion, J. Chim. Phys. 91 (1994) 365-382. 

Blickensderfer, R. 1975. Methane Ignition by Frictional Impact Heating. Combustion and Flame, 25 p. 10. 

Ward, C.R. et al. 2001. Identification of potential for methane ignition by rock friction in Australian coal mines. International Journal of coal geology, 45 p. 13. 

He said methane ignited at the tail of the longwall as the longwall shearer - which had faulty water sprays — cut into sandstone in the mine roof, the likely source of the ignition, which transitioned into a major coal dust explosion. 

Raimondeau et al. modelled the homogeneous high temperature combustion of a pre-heated stoichiometric mixture of methane and air at 2 m s flow rate and a 1000 °C reference temperature, which corresponded to the methane ignition... 

Revel, J., Boettner, J.C., Cathonnet, M., Bachman, J.S. Derivation of a global ehemieal Idnetie mechanism for methane ignition and combustion. J. Chim. Phys. 91, 365-382 (1994) Schilling, C.H., Schuster, S., Palsson, B.O., Heinrich, R. Metabolic pathway analysis basic concepts and scientific applications in the post-genomic taa. Biotechnol. Prog. 15, 296-303 (1999)... 

Trevino, C., Mendez, F. Reduced kinetic mechanism for methane ignition. Proc. Combust. Inst. 

Due to the lower methane diffusion constant and to the longer period of selfignition delay time, spontaneous methane ignition has not been achieved at the same conditions as for hydrogen. Detailed investigation of methane diffusion ignition under decompression requires special experiment for better analysis of mine accidents [3]. 

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