Abstract

Canisters for present-day gas masks are usually filled with impregnated ASC Whetlerite activated carbons. To solve the inherent problems of the carbon catalysts new types of Cu/Zn-based impregnated carbons with complete substitution of Cr with Mo and by addition in the impregnating solution of alkaline K2CO3 and TEDA in some cases were prepared. The removal efficiency of these samples against HCN vapours in air tested under standard conditions demonstrated that the content of K2CO3 to ~ 4% in Cu/Zn samples extends the protection effect to practically equal to the same parameter for the ASC Whetlerite. The inclusion of TEDA in the phase composition of the catalysts does not impair the protection properties towards HCN of the carbon catalysts.