کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
41723 | 45897 | 2011 | 9 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Kinetic modelling of the SO2-oxidation with Pt in a microstructured reactor Kinetic modelling of the SO2-oxidation with Pt in a microstructured reactor](/preview/png/41723.png)
In terms of tons per day SO3 is one of the most important chemicals in the world. It is produced via the contact process in a gas phase catalytic oxidation reaction. The contact process consists of multiple catalyst beds, inter-stage cooling and an absorption step in the case of sulphuric acid production. Transferring this process to a microstructured reactor with its unique heat and mass transport properties should make it possible to develop a small scale one pass synthesis well suited for on-site SO3 production, e.g., for surfactant making. In a test reactor experiments were performed with different molar ratios of sulphur dioxide to oxygen, hydrodynamic residence time and reaction temperature. Numerical simulations with ANSYS FLUENT 12.0 were performed for a single channel configuration. For this purpose a detailed model of the flow, the heat distribution and the surface chemistry was used. For the surface chemistry a detailed kinetic model based on elementary steps occurring on the catalyst surface was used. The assumed multi-step mechanism involves coordination of SO2 on two surface sites. The simulations are compared to the experimental results. Good agreement between the model predictions and the experimental results is achieved. A sensitivity analysis was performed to get an idea of the rate determining steps.
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► SO2 oxidation experiments in a microstructured test reactor.
► Numerical simulations were performed for a single channel configuration.
► For the surface chemistry a kinetic model based on elementary steps was developed.
► The assumed multi-step mechanism involves coordination of SO2 on two surface sites.
► Model predictions and the experimental results are in good agreement.
Journal: Applied Catalysis A: General - Volume 397, Issues 1–2, 30 April 2011, Pages 209–217