Process modeling and analysis of the parameters for oxidation of cyclohexane into cyclohexanone

LI Xiuxi; CAO Liqi; WANG Xing

doi:10.16511/j.cnki.qhdxxb.2018.25.027

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Journal of Tsinghua University(Science and Technology) ›› 2018, Vol. 58 ›› Issue (5) : 523-528. DOI: 10.16511/j.cnki.qhdxxb.2018.25.027

CHEMISTRY AND CHEMICAL ENGINEERING

Process modeling and analysis of the parameters for oxidation of cyclohexane into cyclohexanone

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Abstract

Uncatalysed oxidation of cyclohexane into cyclohexanone is dangerous since the process will explode when the tail oxygen volume fraction reaches a critical limit. Thus, the tail oxygen volume fraction needs to be well characterized for various operating parameters for safe production. A mathematical model of the reaction is given here as a function of the mass transfer rate, hydraulics and cyclohexane volatilization. The reaction kinetics and material balance model are also given. Simulations are then in good agreement with actual production data. The results show that when the gas phase oxygen volume fraction is 28% and the feed gas flow rate is 6 750 Nm³·h^-1, the oxygen tail gas volume fraction increases to 3%, which will cause an explosion. The reaction temperature, the gas phase oxygen volume fraction and the feed gas flow rate are the most sensitive parameters in the reaction process, with the model providing a theoretical basis for controlling safe production of cyclohexanone.

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production safety / cyclohexane oxidation / process simulation / parameter analytic

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LI Xiuxi, CAO Liqi, WANG Xing. Process modeling and analysis of the parameters for oxidation of cyclohexane into cyclohexanone[J]. Journal of Tsinghua University(Science and Technology). 2018, 58(5): 523-528 https://doi.org/10.16511/j.cnki.qhdxxb.2018.25.027

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