Premium
Kinetics of the formation of N 2 O in the catalytic oxidation of NH 3 on Pt‐Rh filament
Author(s) -
ZuShao Hu,
QiZong Qin
Publication year - 1985
Publication title -
acta chimica sinica english edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.28
H-Index - 41
eISSN - 1614-7065
pISSN - 0256-7660
DOI - 10.1002/cjoc.19850030103
Subject(s) - chemistry , kinetics , catalysis , protein filament , reaction rate constant , partial pressure , activation energy , rate equation , order of reaction , ammonia , reaction mechanism , fourier transform infrared spectroscopy , oxygen , analytical chemistry (journal) , organic chemistry , chemical engineering , biochemistry , physics , quantum mechanics , engineering
The kinetics of the reactions involving the formation of N 2 O in the catalytic oxidation of NH 3 have been studied over polycrystalline Pt‐10% Rh filament in a static system, using a Fourier transform infrared spectrometer to monitor the partial pressures of NH 3 and N 2 O. The sole formation of N 2 O proceeds over the filament temperatures range of 250∼350°C The reaction rate is of first order in NH 3 pressure and half order in O 2 pressure, and the rate equation can be written as v = K app · P NH 3 · P O 2 1/2 . The apparent activation energy of the N 2 O formation reaction from the temperature coefficient of the rate constants is found to be 25 kcal/mol. The interpretation of these results in terms of Eley‐Rideal type mechanism has been presented. The rate‐controlling step might be the reaction between gaseous ammonia molecules and the chemisorped oxygen atoms on the surface.