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首页> 外文期刊>Chemical Engineering Research & Design: Transactions of the Institution of Chemical Engineers >Numerical modelling and performance studies of the original and advanced TEMKIN reactor in laboratory scale testing of industrial egg shell catalysts for the selective hydrogenation of acetylene
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Numerical modelling and performance studies of the original and advanced TEMKIN reactor in laboratory scale testing of industrial egg shell catalysts for the selective hydrogenation of acetylene

机译：原始和先进TEMKIN反应器在工业规模蛋壳催化剂用于乙炔选择性加氢的实验室规模测试中的数值模拟和性能研究

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Strong interactions between reaction kinetics and transport phenomena force the use of specialised reactors for catalysis experiments. Our working group developed an advanced version of the so called TEMKIN reactor by Temkin and Kulkova (1969), intended for the direct testing of industrial catalysts, e.g. egg shell catalysts used for the selective hydrogenation of acetylene. This work is dealing with modelling of the complex mass and heat transport to investigate and evaluate the influence on the reaction kinetics. Modelling was done using the commercial modelling software COMSOL Multiphysics (R) and was successfully validated by pulse tagging as well as catalysis experiments. Due to the flexible coupling possibilities in COMSOL, modelling distinguishes between the free gas phase, catalytically active porous shell and inert porous core of the catalyst pellets, ab initio depicting inner as well as outer mass transport limitations. Simulations confirmed good isothermal conditions in both reactor versions, but point out significant transport limitations in the original TEMKIN reactor due to dead zones near the catalyst pellets. Although direct numerical modelling is still challenging due to high computational demands, this work was able to show up its potential in studying laboratory scale reactor designs and catalytic systems. (C) 2014 The Institution of Chemical Engineers. Published by Elsevier B.V. All rights reserved.
机译：反应动力学和传输现象之间的强相互作用迫使将专门的反应器用于催化实验。我们的工作组开发了Temkin和Kulkova（1969）开发的所谓TEMKIN反应器的高级版本，旨在直接测试工业催化剂，例如蛋壳催化剂用于乙炔的选择性加氢。这项工作是处理复杂的质量和热传递的模型，以研究和评估对反应动力学的影响。使用商业建模软件COMSOL Multiphysics（R）进行了建模，并已通过脉冲标记和催化实验成功进行了验证。由于COMSOL中灵活的耦合可能性，因此建模可以区分催化剂颗粒的游离气相，催化活性多孔壳和惰性多孔核，从头开始描述内部和外部质量传输的局限性。模拟结果证实了两种反应器均具有良好的等温条件，但指出由于催化剂颗粒附近的死区，原始TEMKIN反应器存在明显的运输限制。尽管由于较高的计算要求，直接数值建模仍然具有挑战性，但这项工作能够显示其在研究实验室规模的反应器设计和催化系统方面的潜力。 （C）2014化学工程师学会。由Elsevier B.V.发布。保留所有权利。

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