Issue 20, 2022

Numerical analysis on a catalytic pyrolysis reactor design for plastic waste upcycling using CFD modelling

Abstract

Catalytic pyrolysis technologies are a current trend to address plastic waste upcycling, offering lower energy consumption and higher value products when compared to conventional thermal pyrolysis. In this study, catalytic pyrolysis of HDPE was simulated using computational fluid dynamics (CFD) in order to analyze the physical behaviour of a designed fluidized bed reactor unit on a pilot scale. Dimensionless numbers were used for heat and mass transfer assessment to provide useful insights for the scale-up of this technology. A fluidized bed reactor configuration was selected for its effective heat/mass transfer and compatibility with ZSM-5 catalyst. Calculations were performed on a set of temperatures (300–500 °C) and feed rates (0.5–1 kg m−2 s−1) to determine the best performing conditions. Tradeoffs between conversion, production rate and heat consumption were discussed. The key results of this study indicate that a feed rate of 1 kg m−2 s−1 at 500 °C yields the best gasoline production while consuming the lowest amount of energy per kilogram of product.

Graphical abstract: Numerical analysis on a catalytic pyrolysis reactor design for plastic waste upcycling using CFD modelling

Supplementary files

Article information

Article type
Paper
Submitted
03 mar 2022
Accepted
15 apr 2022
First published
25 apr 2022
This article is Open Access
Creative Commons BY-NC license

RSC Adv., 2022,12, 12436-12445

Numerical analysis on a catalytic pyrolysis reactor design for plastic waste upcycling using CFD modelling

L. A. De la Flor-Barriga and U. F. Rodríguez-Zúñiga, RSC Adv., 2022, 12, 12436 DOI: 10.1039/D2RA01407F

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