论文部分内容阅读
Catalytic oxidation of NO by O2 over La0.8Sr0.2MnO3 was tested in a tubular reactor.The reaction temperature ranged from 373 to 473 K,space time from 0.090 to 0.720 s,inlet NO concentration from 300 to 2000μL/L, and O2 volume fraction from 3%to 9%.The steady-state conversion of NO was increased significantly with increasing reaction temperature and the space time,slightly with increasing the O2 concentration but decreased with increasing the inlet NO concentration at a lower temperature.Under the conditions of 0.720 s space time,500μL/L NO concentration, 5%O2 volume fraction and 473 K,NO conversion reached 90%.A kinetic model including a network of 12 elementary reactions with the desorption of NO2 as the rate-limiting step is established and fits the experimental data well.The activation energy of NO2 desorption from the catalyst surface is determined to be 101 kJ/mol.
Catalytic oxidation of NO by O2 over La0.8Sr0.2MnO3 was tested in a tubular reactor. The reaction temperature ranged from 373 to 473 K, space time from 0.090 to 0.720 s, inlet NO concentration from 300 to 2000 μL / L, and O2 volume fraction from 3% to 9%. steady-state conversion of NO was increased significantly increased increasing reaction temperature and the space time, slightly with increasing the O2 concentration but decreased with increasing the inlet NO concentration at a lower temperature. Unit of the conditions of 0.720 s space time, 500 μL / L NO concentration, 5% O2 volume fraction and 473 K, NO conversion reached 90%. A kinetic model including a network of 12 elementary reactions with the desorption of NO2 as the rate-limiting step is established and fits the experimental data well. The activation energy of NO2 desorption from the catalyst surface is determined to be 101 kJ / mol.