Composition of gas from the coal beds of the Taldinskoe deposit

Zhuravleva, N. V.; Potokina, R. R.; Ismagilov, Z. R.; Kudinov, E. V.

doi:10.3103/s0361521915020111

Cited by 4 publications

(1 citation statement)

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“…It is a clean, high-quality energy and chemical raw material rising in the world in the past 20 years. The coal bed methane engine fuel is methyl alkyl fuel, which has some abnormal combustion phenomena such as high minimum ignition energy, slow flame propagation speed, poor thin combustion ability and knock [1,2]. Hydrogen is an active gas.…”

Section: Introductionmentioning

confidence: 99%

Study on Combustion Characteristics of Low Concentration Coalbed Methane Induced by Hydrogen Jet based on Excess Air Ratio

Liu,

Yang,

Qin

et al. 2024

FSD

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Low concentration coal bed gas used for power generation is a better treatment scheme at present, which solves the problem of environmental pollution caused by the direct emptying of coal bed gas. Coal bed methane is a methyl alkyl fuel, and slow combustion rate will cause abnormal combustion phenomena such as large combustion cycle changes. The initial ambient gas concentration has a great influence on the development and propagation of the flame. In this paper, a constant volume bomb model is established to change the excess air coefficient of methane air premix in the initial constant volume bomb, and the change law of combustion heat release is analyzed. The results show that when hydrogen participates in the combustion stage, the combustion rate increases with the increase of excess air coefficient. When hydrogen is burned out, the combustion rate decreases with the increase of excess air coefficient.

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Section: Introductionmentioning

confidence: 99%

Study on Combustion Characteristics of Low Concentration Coalbed Methane Induced by Hydrogen Jet based on Excess Air Ratio

Liu,

Yang,

Qin

et al. 2024

FSD

View full text Add to dashboard Cite

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Numerical Simulation on Combustion Characteristics of Methane–Air Premixed Flame Impacted by Hydrogen Jet

Wang,

He,

Qin

et al. 2024

Journal of Energy Resources Technology

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Low-concentration coalbed methane is an efficient and clean unconventional natural gas with abundant reserves. It can greatly lessen the problem of energy scarcity when used to produce combustion power. Nevertheless, the engine finds it challenging to burn the CH4 directly due to its low and fluctuating concentration. This study suggests using a hydrogen jet to ignite low-concentration coalbed methane. The simulation method is used in this paper. To investigate the effects of various ignition injection strategies on the combustion characteristics of low concentration coalbed methane ignited by a hydrogen jet, a constant volume bomb model was developed. The results show that when the ignition and hydrogen injection interval is 2.0 ms, the cold jet of hydrogen does not burn immediately when it reaches the premixed flame, and there is a transition process from the premixed flame to the jet flame. The larger the interval between ignition and hydrogen injection, the more waste gas is produced after the premixed flame combustion, which has a certain inhibition effect on the formation of the jet flame. With the decrease in the interval between ignition and hydrogen injection, the combustion duration is obviously shortened. Therefore, the earlier hydrogen is involved in the ignition, the faster the combustion speed.

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