Analysis of the overall pressure balance loop for a methanol-to-olefins dual fluidized bed reactor-regenerator--颗粒学报PARTICUOLOGY

Hejazi, B., & Shabany, N. (2023). Analysis of the overall pressure balance loop for a methanol-to-olefins dual fluidized bed reactor-regenerator. Particuology, 82, 13-24. https://doi.org/10.1016/j.partic.2023.01.008

Analysis of the overall pressure balance loop for a methanol-to-olefins dual fluidized bed reactor-regenerator

Bijan Hejazi ^a *, Neda Shabany ^b

a Chemical Engineering Department, Faculty of Engineering, Ferdowsi University of Mashhad, Mashhad, 9177948944, Iran
b Petrochemical Research and Technology Co., Tehran, Iran

10.1016/j.partic.2023.01.008

Volume 82, November 2023, Pages 13-24

Received 12 August 2022, Revised 3 January 2023, Accepted 12 January 2023, Available online 23 January 2023, Version of Record 2 February 2023.

E-mail: b.hejazi@ferdowsi.um.ac.ir; bijanhejazi@gmail.com

Highlights

• Full-loop pressure balance analysis was performed on methanol-to-olefins (MTO) dual fluidized bed reactor.

• MTO dual fluidized bed reactor model was coupled with overall pressure balance.

• Geometric dimensions of a demo-scale reactor configuration were determined.

• Catalyst mass distribution was calculated throughout the entire system.

• This analysis provides the basis for CFD, scale-up and process optimization studies.

Abstract

Development of a comprehensive reactor model is of paramount importance for design and scale-up of methanol-to-olefins (MTO) process in a dual fluidized bed reactor (DFB). These models must integrate suitable reaction kinetic expressions with hydrodynamic models properly descriptive of gas-solid contact in fluidized bed reactors. In this modeling study, our previously developed kinetic models of MTO fluidized bed reactor and regenerator are coupled with overall mass, energy and pressure balances to ensure smooth circulation of catalyst particles between the two fluidized beds. This integrated model was then applied to determine geometric dimensions of a demo-scale MTO DFB configuration and to obtain the mass distribution of catalyst particles throughout the entire system including the pipes connecting the two reactors. Our model is capable of being integrated into simulation software such as Aspen Plus for plant-wide optimization and scale-up studies.

Graphical abstract

Keywords

Pressure balance loop; Methanol-to-olefins; Dual fluidized bed; SAPO-34 catalyst

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