In cases when fuel plays the role of a combustible material, the explosion is known as a fuel-air explosion. acide acétique ).
Even materials that are traditionally thought of as nonflammable (such as aluminum), or slow burning (such as wood), can produce a powerful explosion when finely divided, and can be ignited by even a small spark.
Le monoxyde de carbone est dangereux, notamment du fait qu'il soit incolore et inodore, on ne se rend donc pas compte de sa présence. A detailed discussion of explosives such as gunpowder, TNT etc. When this mixture of fuel and air is ignited, especially in a confined space such as a warehouse or silo, a significant increase in pressure is created, often more than sufficient to demolish the structure. Il t'accompagne tout au long de ton parcours scolaire, pour t'aider à progresser, te motiver et répondre à tes questions. Definition (adjective) Explosive refers to a chemical compound, mixture, device etc. \text{butane} +\text{dioxygène} \ce{->} \text{dioxyde de carbone}+\text{eau}. Tips for Teachers: Helping Students Struggling with Online Learning. Explosions can also be caused by over-pressurized containers. Her body had seemed to spontaneously combust! chemical process where any fuel has a reaction with air (oxidant) to produce heat energy Alors qu'a […] Earn Transferable Credit & Get your Degree. The dust is dispersed in the air at a sufficiently high, The area is confined—a building can be an enclosure, Demonstration of an open-air dust explosion, Deflagration venting through a dust retention and flame-arresting device, This page was last edited on 6 August 2020, at 09:21. Stables vis-à-vis de l'oxygène à température ordinaire, les alcanes subissent, à partir de 150 0 C, des réactions d'oxydation qui conduisent à des mélanges très complexes de produits oxydés dans lesquels prédomine l'acide acétique dont c'est un des procédés de fabrication (cf. [9] It depends on many factors including the type of material used. Unauthorized duplication or posting on other web sites is expressly prohibited. The alternatives for making processes and plants safer depend on the industry. Get access risk-free for 30 days, To support rapid combustion, the dust must consist of very small particles with a high surface area to volume ratio, thereby making the collective or combined surface area of all the particles very large in comparison to a dust of larger particles. La température du mélange combustible initial joue un rôle important dans la naissance de l'explosion. "OSHA Fact Sheet: Hazard Alert: Combustible Dust Explosions", "Will My AM Part Explode? The rate of a detonation is supersonic and can reach speeds of 29,000 fps (8,839 mps). Besoin de plus de renseignements sur l'abonnement ou les contenus ? Il est partagé en deux parties : d'une part, la zone située à basse température et basse pression où se produit une réaction d'oxydation lente ; d'autre part, la zone à haute pression et à haute température où se produit l'explosion.
In fact, coal has been known to spontaneously combust while being transported from one place to another. All rights reserved. The energy released during this chemical reaction is in the form of heat and a pressure wave.
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