Effect of O_3 on NO_2 Sorption from Gas over H-Y Zeolite: Supposition on the Nitrate Anion Formation with NO_2 and O_3 as Coreactants

摘要

The effect of O_3 presence on NO_2 sorption over Y-type zeolite ion exchanged with H~+ was studied. The experiments with a gas-flow system have been performed where the profiles of NO_2 sorption and temperature-programmed desorption were registered. Nitrogen dioxide was removed from a stream of humid air with dew point 0 ℃ by the sorbent saturated with moisture. The distinct influence of ozone presence on the characteristics of NO_2 sorption/desorption has been observed. Significant enhancement of NO_2 uptake has been obtained by the injection of O_3, which was brought about, as it seems, the formation of stable nitrate anions within the sorbent. Also, the probability of the practical application of the observed effect has been considered.