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Experimental Study on the ignition of hydrogen containing atmospheres by mechanical impacts

  • Mechanical friction, impact or abrasion is one of the ignition sources that must be avoided in hazardous zones with explosive atmospheres. The effectiveness of mechanical impacts as ignition source is dependent from several parameters including the minimum ignition energy of the explosive atmosphere, the properties of the material pairing, the kinetic impact energy or the impact velocity. By now there is no standard procedure to determine the effectiveness of mechanical impacts as ignition source. In this work the effectiveness of mechanical impacts with defined and reproducible kinetic impact energy as ignition source for hydrogen containing atmospheres was studied systematically in dependence from the inhomogeneous material pairing considering materials with practical relevance like stainless steel, low alloy steel, concrete, and non-iron-metals. It was found that ignition can be avoided, if non-iron metals are used in combination with different metallic materials, but in combinationMechanical friction, impact or abrasion is one of the ignition sources that must be avoided in hazardous zones with explosive atmospheres. The effectiveness of mechanical impacts as ignition source is dependent from several parameters including the minimum ignition energy of the explosive atmosphere, the properties of the material pairing, the kinetic impact energy or the impact velocity. By now there is no standard procedure to determine the effectiveness of mechanical impacts as ignition source. In this work the effectiveness of mechanical impacts with defined and reproducible kinetic impact energy as ignition source for hydrogen containing atmospheres was studied systematically in dependence from the inhomogeneous material pairing considering materials with practical relevance like stainless steel, low alloy steel, concrete, and non-iron-metals. It was found that ignition can be avoided, if non-iron metals are used in combination with different metallic materials, but in combination with concrete even the impact of non-iron-metals can be an effective ignition source if the kinetic impact energy is not further limited. Moreover, the consequence of hydrogen admixture to natural gas on the effectiveness of mechanical impacts as ignition source was studied. In many cases ignition of atmospheres containing natural gas by mechanical impacts is rather unlikely. No influence could be observed for admixtures up to 25% hydrogen and even more. The results are mainly relevant in the context of repurposing the natural gas grid or adding hydrogen to the natural gas grid.zeige mehrzeige weniger

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Metadaten
Autor*innen:Enis AskarORCiD, Thomas Grunewald
Dokumenttyp:Beitrag zu einem Tagungsband
Veröffentlichungsform:Graue Literatur
Sprache:Englisch
Titel des übergeordneten Werkes (Englisch):Proceedings of the International Conference on Hydrogen Safety 2023
Jahr der Erstveröffentlichung:2023
Organisationseinheit der BAM:2 Prozess- und Anlagensicherheit
2 Prozess- und Anlagensicherheit / 2.1 Sicherheit von Energieträgern
Herausgeber (Institution):HySafe
Aufsatznummer:251
Erste Seite:82
Letzte Seite:93
DDC-Klassifikation:Technik, Medizin, angewandte Wissenschaften / Ingenieurwissenschaften / Angewandte Physik
Freie Schlagwörter:ATEX; Explosion protection; Hazardous areas; Hydrogen transport in pipelines; Ignition source; Mechanical sparks
Themenfelder/Aktivitätsfelder der BAM:Energie
Energie / Wasserstoff
Veranstaltung:International Conference on Hydrogen Safety (ICHS) 2023
Veranstaltungsort:Quebec City, Canada
Beginndatum der Veranstaltung:19.09.2023
Enddatum der Veranstaltung:21.09.2023
ISBN:979-12-210-4274-0
Verfügbarkeit des Dokuments:Datei im Netzwerk der BAM verfügbar ("Closed Access")
Datum der Freischaltung:09.10.2023
Referierte Publikation:Nein
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