Catalytic Oxidation of NO over La_(0.8)Sr_(0.2)MnO_3 Perovskite |
| |
Authors: | ZHAO Ying-xian WEI Feng YU Ying Ningbo Institute of Technology Zhejiang University Ningbo PRChina |
| |
Institution: | Ningbo Institute of Technology Zhejiang University, Ningbo 315100, P. R. China |
| |
Abstract: | 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%.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,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. |
| |
Keywords: | Catalytic oxidation Nitric oxide La0 8Sr0 2MnO3 catalyst Kinetics |
本文献已被 CNKI 维普 万方数据 ScienceDirect 等数据库收录! |
|