Towards synthesis of an optimal thermal cracking reactor |
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Authors: | MWM Van Goethem S Barendregt J Grievink JA Moulijn PJT Verheijen |
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Affiliation: | aTechnip Benelux B.V., Boerhaavelaan 31, 2700AB Zoetermeer, The Netherlands;bDelftChemTech, Delft University of Technology, Julianalaan 136, 2628 BL Delft, The Netherlands;cBiotechnology Department, Delft University of Technology, Julianalaan 67, 2628 BC Delft, The Netherlands |
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Abstract: | To develop new reactor options for thermal cracking of ethane or other light hydrocarbons to lower olefins a fundamental process synthesis approach is taken. Firstly, an optimal reaction path and conditions are targeted, starting from a mechanistic reaction network. Secondly, to implement the optimal reaction path the reactor geometry and equipment are designed. This contribution focuses on the development of a targeting approach, for which a new distributive reaction-mixing synthesis model is formulated and applied. The mixing kernel in the model provides freedom to redistribute the reaction mixture along a continuous reaction coordinate to optimize product yield. The model was validated for two applications. It reproduces the results for the Van de Vusse reaction network as obtained by the attainable region theory. When applied to a small reaction network for the conversion of ethane into ethylene, it reconfirms the existing result that for this network the plug flow mode at maximum temperature and minimum pressure gives the optimal olefin yield. |
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Keywords: | Reactor synthesis Targeting Distributive reaction-mixing Attainable region Thermal cracking |
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