CFD Simulation of Hydrogen Generation and Methane Combustion Inside a Water Splitting Membrane Reactor

Hydrogen production from water splitting remains difficult due to the low equilibrium constant (e.g., Kp ≈ 2 × 10<sup>−8</sup> at 900 °C). The coupling of methane combustion with water splitting in an oxygen transport membrane reactor can shift the water splitting equilibrium toward diss...

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Autores principales:	Te Zhao, Chusheng Chen, Hong Ye
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	oxygen transport membrane reactor water splitting methane combustion CFD simulation hydrogen yield Technology T
Acceso en línea:	https://doaj.org/article/1c0b05a594be4d79826d18e44860a6ed
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spelling	oai:doaj.org-article:1c0b05a594be4d79826d18e44860a6ed2021-11-11T15:57:05ZCFD Simulation of Hydrogen Generation and Methane Combustion Inside a Water Splitting Membrane Reactor10.3390/en142171751996-1073https://doaj.org/article/1c0b05a594be4d79826d18e44860a6ed2021-11-01T00:00:00Zhttps://www.mdpi.com/1996-1073/14/21/7175https://doaj.org/toc/1996-1073Hydrogen production from water splitting remains difficult due to the low equilibrium constant (e.g., Kp ≈ 2 × 10<sup>−8</sup> at 900 °C). The coupling of methane combustion with water splitting in an oxygen transport membrane reactor can shift the water splitting equilibrium toward dissociation by instantaneously removing O<sub>2</sub> from the product, enabling the continuous process of water splitting and continuous generation of hydrogen, and the heat required for water splitting can be largely compensated for by methane combustion. In this work, a CFD simulation model for the coupled membrane reactor was developed and validated. The effects of the sweep gas flow rate, methane content and inlet temperature on the reactor performance were investigated. It was found that coupling of methane combustion with water splitting could significantly improve the hydrogen generation capacity of the membrane reactor. Under certain conditions, the average hydrogen yield with methane combustion could increase threefold compared to methods that used no coupling of combustion. The methane conversion decreases while the hydrogen yield increases with the increase in sweep gas flow rate or methane content. Excessive methane is required to ensure the hydrogen yield of the reactor. Increasing the inlet temperature can increase the membrane temperature, methane conversion, oxygen permeation rate and hydrogen yield.Te ZhaoChusheng ChenHong YeMDPI AGarticleoxygen transport membrane reactorwater splittingmethane combustionCFD simulationhydrogen yieldTechnologyTENEnergies, Vol 14, Iss 7175, p 7175 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	oxygen transport membrane reactor water splitting methane combustion CFD simulation hydrogen yield Technology T
spellingShingle	oxygen transport membrane reactor water splitting methane combustion CFD simulation hydrogen yield Technology T Te Zhao Chusheng Chen Hong Ye CFD Simulation of Hydrogen Generation and Methane Combustion Inside a Water Splitting Membrane Reactor
description	Hydrogen production from water splitting remains difficult due to the low equilibrium constant (e.g., Kp ≈ 2 × 10<sup>−8</sup> at 900 °C). The coupling of methane combustion with water splitting in an oxygen transport membrane reactor can shift the water splitting equilibrium toward dissociation by instantaneously removing O<sub>2</sub> from the product, enabling the continuous process of water splitting and continuous generation of hydrogen, and the heat required for water splitting can be largely compensated for by methane combustion. In this work, a CFD simulation model for the coupled membrane reactor was developed and validated. The effects of the sweep gas flow rate, methane content and inlet temperature on the reactor performance were investigated. It was found that coupling of methane combustion with water splitting could significantly improve the hydrogen generation capacity of the membrane reactor. Under certain conditions, the average hydrogen yield with methane combustion could increase threefold compared to methods that used no coupling of combustion. The methane conversion decreases while the hydrogen yield increases with the increase in sweep gas flow rate or methane content. Excessive methane is required to ensure the hydrogen yield of the reactor. Increasing the inlet temperature can increase the membrane temperature, methane conversion, oxygen permeation rate and hydrogen yield.
format	article
author	Te Zhao Chusheng Chen Hong Ye
author_facet	Te Zhao Chusheng Chen Hong Ye
author_sort	Te Zhao
title	CFD Simulation of Hydrogen Generation and Methane Combustion Inside a Water Splitting Membrane Reactor
title_short	CFD Simulation of Hydrogen Generation and Methane Combustion Inside a Water Splitting Membrane Reactor
title_full	CFD Simulation of Hydrogen Generation and Methane Combustion Inside a Water Splitting Membrane Reactor
title_fullStr	CFD Simulation of Hydrogen Generation and Methane Combustion Inside a Water Splitting Membrane Reactor
title_full_unstemmed	CFD Simulation of Hydrogen Generation and Methane Combustion Inside a Water Splitting Membrane Reactor
title_sort	cfd simulation of hydrogen generation and methane combustion inside a water splitting membrane reactor
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/1c0b05a594be4d79826d18e44860a6ed
work_keys_str_mv	AT tezhao cfdsimulationofhydrogengenerationandmethanecombustioninsideawatersplittingmembranereactor AT chushengchen cfdsimulationofhydrogengenerationandmethanecombustioninsideawatersplittingmembranereactor AT hongye cfdsimulationofhydrogengenerationandmethanecombustioninsideawatersplittingmembranereactor
_version_	1718432523933974528

CFD Simulation of Hydrogen Generation and Methane Combustion Inside a Water Splitting Membrane Reactor

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