Dehydrogenation of Methylbutenes to Isoprene: A Comparative Mathematical Analysis of the Dehydrogenation of Methylbutenes to Isoprene in Axial and Radial Reactors

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Abstract

Using a mathematical model that describes the process of methylbutene dehydrogenation to isoprene, a comparative analysis of energy efficiency is performed for two upgrading variants: (1) a system of two serially arranged axial fixed-bed reactors and (2) an adiabatic fixed-bed reactor. A mathematical analysis is performed to determine the dependence of yield Y and selectivity S on quantity Q of thermal energy supplied by means of steam in each case. For the two-reactor system, the best performance characteristics (Y = 53.1% and S = 82.9%) are attained at Q = 9.0 MJ/kg and contact time t = 0.8 s. However, the best performance characteristics in the radial reactor (Y = 42.0% and S = 86.1%) are observed at Q = 7.8 MJ/kg and t = 0.8 s. It follows that the thermal energy required for the methylbutenes dehydrogenation reaction in the radial reactor is 13.0% lower than for the axial reactors.

About the authors

B. Sh. Gilmurakhmanov

Kazan (Volga) Federal University

Author for correspondence.
Email: gilmurahmanov@mail.ru
Russian Federation, Kazan, Tatarstan, 420008

P. V. Urtyakov

Kazan (Volga) Federal University

Author for correspondence.
Email: peton_562@mail.ru
Russian Federation, Kazan, Tatarstan, 420008

M. V. Nazarov

Kazan (Volga) Federal University

Author for correspondence.
Email: humic-acid@mail.ru
Russian Federation, Kazan, Tatarstan, 420008

O. S. Roshchina

Kazan (Volga) Federal University

Author for correspondence.
Email: rooss87@mail.ru
Russian Federation, Kazan, Tatarstan, 420008

A. A. Lamberov

Kazan (Volga) Federal University

Author for correspondence.
Email: lamberov@list.ru
Russian Federation, Kazan, Tatarstan, 420008

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