DISPROPORTIONATION REACTION OF NITROGEN MONOXIDE ON CaHY-TYPE ZEOLITE.

Article abstract of DOI:10.1246/bcsj.57.2046

The disproportionation reaction of NO was investigated on CaHY-type zeolite. The relation between pretreatment temperature and activity was determined by the pulse reaction technique, and the dependence of the initial formation rate of N//2O on NO pressure was investigated with a gas circulation system. The rate of initial formation of N//2O is third order in NO pressure in the lower pressure region (ca. 30 Torr, 1 Torr approximately equals 133. 322 Pa) and 2. 2th order in NO pressure in the higher pressure region (ca. 200 Torr). TPD spectra are composed mainly of three peaks: The first peak is assigned to the unreactive adsorbed NO, the second to the NO produced by the decomposition of N//2O//3 and left on the zeolite surface, and the third to the N//2O remaining.