Effects of mesh aluminium alloy and aluminium velvet on the explosion of H2/air, CH4/air and C2H2/air mixtures

The free radical mechanism of the effects of different metal materials on hydrogen explosion

“…It is then analyzed in terms of the facilitation of the material, and when the hydrogen volume fraction in the reaction system is higher than 25%, the increase in the hydrogen volume fraction directly leads to an increase in the amount of ·H and ·O produced during the chain initiation phase, indirectly increasing the amount of ·OH produced and accelerating the reaction rate of several key elementary reactions such as H + O 2 = O + OH, OH + H 2 = H + H 2 O and O + H 2 = H + OH during the hydrogen explosion. At which time the metal wires in the pipe will generate turbulent flames in the pipe due to their irregular arrangement and the gap between materials, 14 and the collision area between H 2 , O 2 and intermediates such as ·H, ·O, and ·OH increases, making a dramatic change in the explosion of hydrogen in the pipe and significantly increasing the explosive strength of hydrogen. In addition, the resulting turbulent flame accelerates the transfer of free radicals, sharply increasing the number of key radicals such as ·H, ·O, and ·OH, further accelerating the rate of multiple chain reactions.…”

“…The current research results for hydrogen explosion mainly involve fine water mist, 6–8 halogenated hydrocarbons, 9,10 inert gases, 11,12 and barrier explosion-proof materials. 13,14 Studies on the effect of metallic barrier materials on hydrogen explosions have mainly included aluminium alloys and aluminium wires, both of which are antimagnetic materials, while little research has been carried out on ferromagnetic materials. Metal barrier materials are commonly used to suppress alkane gas explosions.…”

The dual effect and mechanism analysis of expanded aluminum on an ethylene explosion

“…10 However, further studies have found that different densities of EA have the dual effect of inhibition and promotion of hydrogen or acetylene, respectively. 11,12 For all that, in mixed gases EA still has dual suppression or promotion effects on the a methane or propanehydrogen explosion, 13 and therefore the existence of hydrogen plays a vital role in promoting it. However, an explanation of the mechanism needs more relevant empirical and simulation explanations.…”

Secondary Explosion Characteristics and Chemical Kinetics of CH4/Air Induced by a High-Temperature Surface

“…2 In this relatively closed environment, gas explosion accidents caused by coal spontaneous combustion may occur, which will cause very serious disasters. [3][4][5][6][7][8] A lowpressure zone was formed in the center of the primary explosion. The gas emitted from the goaf accumulates rapidly to this zone.…”

“…Coal spontaneous combustion area is formed due to the accumulation of heat in the coal seam in the interior where people cannot look directly and reach in the process of coal mining . In this relatively closed environment, gas explosion accidents caused by coal spontaneous combustion may occur, which will cause very serious disasters. - A low-pressure zone was formed in the center of the primary explosion. The gas emitted from the goaf accumulates rapidly to this zone .…”