A New Type of BTP/Zeolites Nanocomposites as Mixed-phase Fire Suppressant: Preparation, Characterization, and Extinguishing Mechanism Discussion

A new type of nanocomposites consisting of solid 4A zeolites and gaseous fire extinguishing agent of 2-bromo-3,3,3-trifluoropropene (BTP) was fabricated in large scale, in which BTP anchored in the porous zeolites. Laboratory-scale fire extinguishment tests showed that the nanocomposites as additives can greatly improve the performance of conventional sodium bicarbonate (NaHCO 3) dry powder for relatively shorter extinguishing time and smaller amount of agents required. Such an improvement could be ascribed to the simultaneous effect of solid NaHCO3, gaseous BTP desorbed from the zeolite when presented to higher temperature and the porous zeolite as heterogeneous inhibition of flame free radicals.