Kinetic Study of NO Oxidation over Pt/γ-Al2O3 and La0.8 Sr 0.2MnO3
Catalytic oxidation of NO with O2 over Pt/-Al2O3 and La0.8Sr0.2MnO3 was conducted with a tubular reactor in range of space time 0.090-0.720 second, inlet NO concentration 0.03-0.2 vol%, O2 concentration 2-10 vol% and at 473 K. Under the conditions of 0.720 s space time, 0.05 vol% NO and 5 vol% O2 concentrations, the steady-state conversion of NO oxidation over Pt/-Al2O3 and La0.8Sr0.2MnO3 reached 22.4 and 90.5 %, respectively. A kinetic model consisting of 12 elementary reactions fits the experimental data adequately, indicated that the rate-limiting step of NO oxidation over Pt/-Al2O3 was the reaction between gaseous NO with dissociately adsorbed O, and over La0.8Sr0.2MnO3 was the desorption of product NO2.
Weiguo Pan, Jianxing Ren and Yongguang Li
Y. X. Zhao and L. Xiao, "Kinetic Study of NO Oxidation over Pt/γ-Al2O3 and La0.8 Sr 0.2MnO3", Advanced Materials Research, Vols. 347-353, pp. 862-869, 2012