| Zugriffsnummer | 42893 |
| Dokumenttyp | Konferenzartikel |
| Peer Review | unbekannt |
| Sprache | Englisch |
| Titel | Ignition temperature of combustible liquids in mixtures of air with oxygen or dinitrogen oxide |
| Autor(in); Institution |
Brandes, Elisabeth; 3.7, Grundlagen des Explosionsschutzes, PTB-Braunschweig
Hirsch, Werner; 3.7, Grundlagen des Explosionsschutzes, PTB-Braunschweig
Mitu, Maria; Ilie Murgulescu-Institute of Physical Chemistry, Bucharest, ROMANIA
Zakel, Sabine; 3.7, Grundlagen des Explosionsschutzes, PTB-Braunschweig
|
| Quelle/Jahr | 27th International Colloquium on the Dynamics of Explosions and Reactive Systems ICDERS:(2019), 6 S. |
| URL | |
| Konferenzangaben | 27th International Colloquium on the Dynamics of Explosions and Reactive Systems ICDERS, Beijing, 28, July - 2, August, 2019, China |
| Freie Schlagworte | explosion protection ; autoignition ; ignition temperature ; nitrous oxide ; oxygen ; air |
| Zusammenfassung | A hot surface can become a potential ignition source in the presence of a combustible vapour/air mixture. Chemical and technical processes as well as cleaning operations are often carried out at temperatures high enough that such surfaces result. The autoignition temperature (AIT) is a safety characteristic used, on the one hand, to classify the combustible substances and, on the other hand, to classify the explosion-proof equipment according to the surface temperature. Under environmental conditions, the autoignition temperature is determined in accordance with standards such as DIN 51794, ISO/IEC 80079-20-1, DIN EN 14522 and ASTM E 659-78. According to these standards, the autoignition temperature is measured at ambient pressure with air as the oxidizing gas. Oxidizing gases other than air may lead to significantly different ignition temperatures (IT). A considerable body of data has already been collected with pure oxygen as the oxidizer. Some substances show an ignition temperature in pure oxygen (ITOX) that is only a few degrees Kelvin lower than the AIT in air; however, for many other substances, it is lower by at least 100 K. For some substances that are not flammable in air at all, ITOX can be found in pure oxygen. Data on ignition temperatures in oxidants other than air or oxygen is rather sparse, while no data is available on the ignition temperatures of nitrogen/oxygen mixtures with an oxygen content between 21 vol% and 100 vol%, nor on such temperatures in dinitrogen monoxide (N2O), despite its widespread industrial use. The aims of this work are to determine the ignition temperatures of the vapours of several combustible liquids in mixtures of air/oxygen or air/N2O under variation of the mixture composition and to find a correlation that allows the ignition temperature to be predicted with regard to the chemical structure. |
| Themenbereich der Metrologie | Physikalische Sicherheitstechnik, Explosionsschutz |
Zitierung
Brandes, E., Hirsch, W., Mitu, M., & Zakel, S. (2019). Ignition temperature of combustible liquids in mixtures of air with oxygen or dinitrogen oxide. 27th International Colloquium on the Dynamics of Explosions and Reactive Systems ICDERS, Beijing, 28, July - 2, August, 2019, China.