High temperature generated by sliding metal friction and its effectiveness as an ignition source for hydrogen

Song, Chunhui; Jiang, Haipeng; Gao, Wei

doi:10.1016/j.jlp.2022.104833

Cited by 4 publications

(3 citation statements)

References 25 publications

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“…Several possible ignition mechanisms have been proposed to investigate the mechanism of spontaneous ignition of high-pressure leaking hydrogen [9], including inverse Joule-Thomson interaction [10,11] , electrostatic ignition [12][13][14], diffusive ignition [15], instantaneous adiabatic compression ignition [16], hot surface ignition [17][18][19][20], and mechanical friction and impact ignition [21]. Individually, none of them can provide a comprehensive explanation for all instances of spontaneous ignition resulting from hydrogen leaks.…”

Section: Diffusion Ignition Theorymentioning

confidence: 99%

“…It led to the formation of a converging nozzle, which resulted in a reduced supersonic flow velocity and a significant reduction in shock wave velocity and overpressure in the tube. The opening behavior of the rupture disc affected the mixing process of hydrogen and air [21], with the faster the opening time of the rupture disc, the closer the gas was to adiabatic expansion and the better the result.…”

Section: Effect Of Rupture Disc Opening Timementioning

confidence: 99%

See 1 more Smart Citation

Safe use of hydrogen energy: review on hydrogen self- ignition and generated hydrogen jet fire

Zhi,

Li,

Zhou

et al. 2024

Preprint

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In the fight against climate change, hydrogen is seen as a promising sustainable energy alternative to fossil fuels. However, its wider adoption has raised safety issues, particularly regarding spontaneous combustion without an external spark. To ensure safe and sustainable hydrogen use, researchers have developed a thorough research approach targeting hydrogen's potential for spontaneous combustion. Progress has been made in understanding this phenomenon within transparent extension tubes, examining various factors like tube dimensions, curvature, shape, and rupture disc properties. These studies have revealed consistent trends. Simulations have helped explain how hydrogen auto-ignites, often starting at the tube wall, especially in high-pressure situations where it interacts with hot air and expands cold fuel. Researchers have also created mathematical models related to ignition dynamics. Yet, there's limited experimental data on hydrogen jet self-ignition in open spaces. Some simulations suggest that high-pressure hydrogen can ignite spontaneously even without a confinement, but the ignition event is so brief that it's difficult to capture experimentally. Moreover, scholars are creating more accurate empirical formulas based on extensive experimental statistics that connect internal tube ignition to external jet flames. The accuracy of these empirical estimates improves as more experimental data becomes available.

show abstract

Section: Diffusion Ignition Theorymentioning

confidence: 99%

Section: Effect Of Rupture Disc Opening Timementioning

confidence: 99%

Safe use of hydrogen energy: review on hydrogen self- ignition and generated hydrogen jet fire

Zhi,

Li,

Zhou

et al. 2024

Preprint

View full text Add to dashboard Cite

show abstract

“…-----However, due to the complexity of the process system, multiple key equipment components, high material requirements, and the flammable and explosive characteristics of the main reactants and products in the hydrogen production from NG, there are accident hazards in all steps of the process [24]. In particular, hydrogen, as the main reaction medium, has the characteristics of low ignition energy [25], wide explosion limit range (4-75 %) [26], fast flame propagation velocity [27], and high diffusion coefficient [28], posing a significant safety threat. Public acceptance affects the development of the hydrogen economy, which requires that the probability and consequence severity of potential accidents at hydrogen production plants and ancillary infrastructure be maintained at tolerable levels in the long term [29].…”

Section: Introductionmentioning

confidence: 99%

Risk Identification and Safety Technology for Hydrogen Production from Natural Gas Reforming

Feng,

Gu,

Pang

et al. 2024

ChemBioEng Reviews

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The hydrogen production from natural gas has advantages of low investment, low carbon emission, and high hydrogen production rate. This paper briefly describes the technical overview of hydrogen production from natural gas reforming and identifies its risk factors. According to the dangerous characteristics of high reaction temperature, easy leakage of reaction medium, flammability, and explosion in the process, the intrinsic safety of the process is discussed in combination with relevant research and industrial experience. The safety requirements of key equipment and materials are introduced in detail, followed by the optimization methods of process safety that can be taken in the engineering process. Besides, the accident prevention measures for emergency shutdown and fire explosion are summarized. Finally, the future research demands are put forward from the perspective of research and development, which is instructive for the safe hydrogen production from natural gas in the future.

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CO2 utilization for methanol production: a review on the safety concerns and countermeasures

Feng,

Gu,

Dong

et al. 2024

Environ Sci Pollut Res

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High temperature generated by sliding metal friction and its effectiveness as an ignition source for hydrogen

Cited by 4 publications

References 25 publications

Safe use of hydrogen energy: review on hydrogen self- ignition and generated hydrogen jet fire

Safe use of hydrogen energy: review on hydrogen self- ignition and generated hydrogen jet fire

Risk Identification and Safety Technology for Hydrogen Production from Natural Gas Reforming

CO2 utilization for methanol production: a review on the safety concerns and countermeasures

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