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Arabian Journal for Science and Engineering

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05-08-2021 | Research Article-Mechanical Engineering

Numerical Simulation of Thermal and Mass Behaviors During Pyrolysis Homogeneous Reaction Within a Screw Reactor

Authors: Amal Masmoudi, Moez Hammami, Mounir Baccar

Published in: Arabian Journal for Science and Engineering | Issue 12/2021

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Abstract

In this study, a three-dimensional numerical analysis has been presented to simulate pyrolysis process involving transfer phenomena within a tubular reactor equipped with a rotating screw. A specific computational fluid dynamics code based on the finite volume method is developed in order to solve the general governing equations of momentum, energy and species concentration coupled with the thermochemical reaction of pyrolysis. The developed model aims to simulate the interaction between the kinetics of pyrolysis and transfer phenomena. Besides, the influence of various dimensionless numbers which are axial Reynolds number (Re_a), mass Damköhler number (Da_m), thermal Damköhler number (Da_th), dimensionless activation energy (E*) and preheat parameter (τ) on the temperature and species concentration fields has been studied. It was found that the decrease in the axial Reynolds number, the thermal Damköhler number and the activation energy enhances the rate of conversion of the cellulose. However, the results of the numerical simulation have shown that the increase in the mass Damköhler number and the inlet temperature improves the cellulose conversion rate.

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Title: Numerical Simulation of Thermal and Mass Behaviors During Pyrolysis Homogeneous Reaction Within a Screw Reactor
Authors: Amal Masmoudi
Moez Hammami
Mounir Baccar
Publication date: 05-08-2021
Publisher: Springer Berlin Heidelberg
Published in: Arabian Journal for Science and Engineering / Issue 12/2021
Print ISSN: 2193-567X
Electronic ISSN: 2191-4281
DOI: https://doi.org/10.1007/s13369-020-05295-8

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