Abstract：The oxidation of NO catalyzed by silicon-rich molecular sieves ZSM-5 with strong hydrophobicity at ambient temperature was investigated. The experimental results showed that NO was oxidized to NO2, which adsorbed on ZSM-5 surface and desorbed after saturation. Water vapor concentration in the NOx waste gas did not have significant effect on NO oxidation using ZSM-5, as opposed to that using activated carbon. The steady-state NO conversion in saturated wet gas decreased slightly by 6% compared to that in the dry gas at 303K over ZSM-5 due to its strong hydrophobicity. The intrinsic kinetics of NO oxidation was studied in an isothermal integral fixed-bed reactor, assuming that the effects of internal and external diffusion in the ZSM-5 catalyst pellet were negligible. The X~W/FA0 values and NO partial pressure at different temperatures were measured to evaluate the reaction rates. A simplified exponential kinetic model was established. The NO oxidation kinetic equation was determined by non-linear regression, and it fitted the experimental data well.
李玉芳, 刘华彦, 黄海凤, 卢晗锋, 陈银飞. NO在分子筛ZSM-5催化剂上催化氧化动力学研究[J]. 中国环境科学, 2010, 30(2): 161-166.
LI Yu-Fang, LIU Hua-Yan, HUANG Hai-Feng, LU Han-Feng, CHEN Yin-Fei. Performance and intrinsic kinetics of molecular sieves ZSM-5 in NO catalytic oxidation. CHINA ENVIRONMENTAL SCIENCECE, 2010, 30(2): 161-166.
