Explosibility and Fire Behavior of some Pyrethroids, Active Agents of Plant Protection Products

• Main Authors: Maciej Celinski, Wojciech Domanski
• Format: Article
• Language: English
• Published: AIDIC Servizi S.r.l. 2016-04-01
• Series: Chemical Engineering Transactions
• Online Access: https://www.cetjournal.it/index.php/cet/article/view/3330

Deflagration Index (Kst) parameter determines the speed of the pressure rise during the explosion of tested dust. The larger the Kst, the more severe the explosion. Kst value allows to assign tested compound to Dust Explosion Class, which is a benchmark of comparison for all dusts. Minimum explosible concentration (MEC) is one of the most important parameter for modern industry, allowing to determine the highest safe concentration of dust in workplace. Due to alarming results gain during our study upon flammability of pyrethroids we investigated explosive properties and Minimum Ignition Energy (MIE) of three most popular compounds. Lambda-cyhalothrine and deltamethrine exhibit week explosive properties (ST1) and MIE valuesof 1000 mJ and 300 mJ respectively. Beta-cyfluthrin classified to ST3 explosive class with Kst above 300 and MIE at 100 mJ. For all tested compounds we established MEC at 60 g/m3. The paper shows also results of Maximum Pressure (Pmax) studies of tested pyrethroids.