Effect of the presence of mesoporous catalysts in the decomposition of 4-(Methylnitrosoamine)-1-(3-Pyrydyl)-1-Butanone under inert and oxidative atmosphere

Abstract

4-(Methylnitrosoamine)-1-(3-Pyrydyl)-1-Butanone is one of the most toxic substances present in tobacco that comes mainly from the curing process. In this work we have studied the decomposition reactions and the compounds obtained as a function of temperature, under inert atmosphere and air atmosphere. TGA and EGA PY-GC/MS (flash pyrolysis) have been used. The effect of the addition of two SBA-15, with different morphologies (fibres and platelets), and a MCM-41 catalyst were studied. In TGA analysis MCM-41 is the material that produces more changes in the decomposition of this nitrosamine, especially in oxidative atmosphere. The EGA experiments show that 4-(Methylnitrosoamine)-1-(3-Pyrydyl)-1-Butanone is more unstable in air atmosphere and the three materials accelerate the decomposition being MCM-41 followed by SBA-15p those producing the larger modifications in the composition of the gases evolved. All three materials studied favor the elimination of the highly toxic and carcinogenic compounds generated in decomposition of 4-(Methylnitrosoamine)-1-(3-Pyrydyl)-1-Butanone, thus making them interesting materials for reducing of the toxicity of the tobacco smoke.