A structured packed-bed reactor designed for exothermic hydrogenation of acetone |
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Authors: | Yanjun Duan ;Min Xu ;Xiaoming Zhou ;Xiulan Huai |
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Institution: | [1]Institute of Engineering Thermophysics, Chinese Academy of Sciences, Beijing 100190. China; [2]University of Chinese Academy of Sciences. Beijing 100049 China, Chinese Academy of Sciences, Beijing 100190. China; |
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Abstract: | Fixed-bed reactors randomly packed with catalysts have many disadvantages that may adversely affect the desired chemical reaction.The increasingly used monolithic reactor,in contrast,has many operational advantages;however,for a kinetically-controlled reaction,it does not contain sufficient catalyst to sustain the reaction.To address the problems associated with both randomly packed-bed reactor and the monolithic reactor,a structured packed-bed reactor was proposed and mathematical models were built for randomly packed-bed reactor and structured packed-bed reactor.Their respective performances were compared when applied to the exothermic reaction of the isopropanol-acetone-hydrogen chemical heat pump system.The results showed that the structured packed-bed reactor performed better in terms of pressure drop and heat transfer capacity,and had a lower radial temperature gradient,indicating that this reactor had a higher effective heat conductivity.Isopropanol on the catalyst particle surfaces was more concentrated near the tube wall because a wall effect existed in the boundary layer around the particle-wall contact points. |
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Keywords: | Chemical heat pump Structured packed-bed reactor Acetone hydrogenation CFD simulation |
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