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首页> 外文会议>3rd International Symposium on Reaction Kinetics and the Development and Operation of Catalytic Processes, Apr 22-25, 2001, Oostende, Belgium >Harmonization of the empirical information on the de-NO_x catalysts for the comparison of the catalyst performance through reaction modeling
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Harmonization of the empirical information on the de-NO_x catalysts for the comparison of the catalyst performance through reaction modeling

机译：协调脱硝催化剂的经验信息，以通过反应建模比较催化剂性能

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摘要

In an effort to rationally design a monolith catalytic converter, data harmonization and converter analyses were performed on model reactors. The empirical data presented in the literature on CO and hydrocarbon oxidation over various catalysts were harmonized for space times through a simple model reaction. The model parameters on CO and hydrocarbon oxidation were used along with the reported temperature and velocity profiles to analyze the axial and radial conversion behavior in a cylindrical monolith geometry. The axial conversion behavior was investigated via a multiple CSTR reactor model. In order to investigate the radial effects, the reactor was divided into one central cylinder and three doughnut shaped subsections. The division points were based on the shape of the velocity profile. During this analysis the diffusional and mass transfer effects were neglected. Analyses were performed for net oxidizing and net reducing exhaust atmospheres. The temperature and flow non-uniformities present in the catalytic converters resulted in unique conversion profiles: The velocity maximum in the central part of the reactor resulted in lower conversions than the intermediate parts. The lowest conversions occurred at the peripheral annular region. With this information, it will be possible to tailor the metal loading as a function of radial coordinate to improve the conversion non-uniformities and the precious metal economy.
机译：为了合理设计整体式催化转化器，在模型反应器上进行了数据协调和转化器分析。通过简单的模型反应，协调了各种催化剂上一氧化碳和碳氢化合物在多种催化剂上的氧化反应的经验数据。使用关于CO和碳氢化合物氧化的模型参数以及所报告的温度和速度曲线，来分析圆柱整体几何形状中的轴向和径向转化行为。通过多个CSTR反应器模型研究了轴向转化行为。为了研究径向影响，将反应堆分为一个中央圆柱体和三个甜甜圈形子部分。分割点基于速度曲线的形状。在此分析中，忽略了扩散和传质的影响。进行了净氧化和净还原排气气氛的分析。催化转化器中存在的温度和流量不均匀性导致了独特的转化曲线：反应器中心部分的最大速度导致的转化率低于中间部分。最低的转化率发生在周边的环形区域。有了这些信息，就有可能根据径向坐标调整金属负载，以改善转化不均匀性和贵金属经济性。

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