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Experimental and Computational Multiphase Flow 2022, 4(4): 360-376 https://doi.org/10.1007/s42757-021-0105-7
Research Article | Issue | Published: 17 May 2021

Numerical analysis of multiphase flow in chemical looping reforming process for hydrogen production and CO2 capture

Show Author's Information Akash Chavda1,  Pranav Mehta2,  Atal Harichandan3( )
Department of Mechanical Engineering, Christ Polytechnic Institute, Rajkot, Gujarat, India
Department of Mechanical Engineering, Dharmsinh Desai University, Nadiad, Gujarat, India
Department of Mechanical Engineering, Kalinga Institute of Industrial Technology, Bhubneswar, Odisha, India
Keywords:
CO2 capture, H2 production, bubble hydrodynamics, chemical looping reforming
Cite this article:
Chavda A, Mehta P, Harichandan A. Numerical analysis of multiphase flow in chemical looping reforming process for hydrogen production and CO2 capture. Experimental and Computational Multiphase Flow, 2022, 4(4): 360-376. https://doi.org/10.1007/s42757-021-0105-7
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Abstract Full text About this article

The unsteady characteristics of bubble dynamics inside the air reactor within the first 0–40 s of reforming has always been studied for defining the design criteria of the reactor. In the study, a temporal aspect of the hydrodynamics and chemical kinetics in the reactor of a chemical looping reforming system in form of volume fraction contours of solid species and molar fraction of H2O has been numerically simulated by considering manganese (Mn) and iron (Fe) based metal oxides as oxygen carriers. The Finite Volume Method based approach has been employed to simulate the steam reactor model by encompassing it as a fluidized bed reactor. The granular flow under kinetic theory has been employed using a multiphase Eulerian-based approach for both gas and solid phases in the form of a shrinking core model. An influence of various operating parameters such as particle size of the oxygen carriers, steam inlet velocity, and temperature of the steam reactor on an overall conversion rate of iron-based oxide (FeO) and manganese-based oxide (MnO). The maximum steam conversion rate for FeO and MnO was observed at 32% and 34% at 0.6 m/s steam velocity, 48% and 60% at a maximum temperature of 1273 K, and 47% and 64% at a particle size of 100 µm, respectively.


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About this article

Numerical analysis of multiphase flow in chemical looping reforming process for hydrogen production and CO2 capture

Show Author's information Akash Chavda1, Pranav Mehta2, Atal Harichandan3( )
Department of Mechanical Engineering, Christ Polytechnic Institute, Rajkot, Gujarat, India
Department of Mechanical Engineering, Dharmsinh Desai University, Nadiad, Gujarat, India
Department of Mechanical Engineering, Kalinga Institute of Industrial Technology, Bhubneswar, Odisha, India

Abstract

The unsteady characteristics of bubble dynamics inside the air reactor within the first 0–40 s of reforming has always been studied for defining the design criteria of the reactor. In the study, a temporal aspect of the hydrodynamics and chemical kinetics in the reactor of a chemical looping reforming system in form of volume fraction contours of solid species and molar fraction of H2O has been numerically simulated by considering manganese (Mn) and iron (Fe) based metal oxides as oxygen carriers. The Finite Volume Method based approach has been employed to simulate the steam reactor model by encompassing it as a fluidized bed reactor. The granular flow under kinetic theory has been employed using a multiphase Eulerian-based approach for both gas and solid phases in the form of a shrinking core model. An influence of various operating parameters such as particle size of the oxygen carriers, steam inlet velocity, and temperature of the steam reactor on an overall conversion rate of iron-based oxide (FeO) and manganese-based oxide (MnO). The maximum steam conversion rate for FeO and MnO was observed at 32% and 34% at 0.6 m/s steam velocity, 48% and 60% at a maximum temperature of 1273 K, and 47% and 64% at a particle size of 100 µm, respectively.

Keywords: CO2 capture, H2 production, bubble hydrodynamics, chemical looping reforming

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Publication history
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Publication history

Received: 17 August 2020
Revised: 15 February 2021
Accepted: 04 March 2021
Published: 17 May 2021
Issue date: December 2022

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