Poster (After Call)

FZJ-2023-05701

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Mathematical Modelling of Oxygen Membrane Reactors

Bittner, K. (Corresponding author)FZJ* ; Büddefeld, B. ; Margaritis, N.FZJ* ; Schulze-Küppers, F.FZJ* ; Wolters, J.FZJ* ; Natour, G.FZJ*

2023

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Please use a persistent id in citations: doi:10.34734/FZJ-2023-05701

Abstract: Oxygen Membrane Reactors offer an opportunity towards the transition to renewable energies and defossilized economies by efficiently coupling chemical reactions and heat utilization. Typically, an oxygen conducting membrane is used to separate a chamber with an oxygen releasing reaction from a chamber with an oxygen consuming reaction. This establishes a gradient in oxygen partial pressure across the membrane, which serves as the driving force for the oxygen transport. To identify viable processes, mathematical models are needed that allow a straightforward assessment. In this work, a generalized model is presented that can be applied to arbitrary oxygen membrane reactor concepts. The model assumes chemical equilibrium which is realized by minimizing the Gibbs free energy in the individual reaction chambers. Both reaction chambers are coupled by the Wagner equation to account for the oxygen ion flux through the membrane. The model allows to investigate various process parameters such as oxygen flux and gas compositions, making the model particularly suitable for feasibility studies and initial design iterations for new reactor developments.

Keyword(s): Energy (1st)

Note: This work was supported by the Federal Ministry of Education and Research (Germany) [grant 03SF0648].

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Contributing Institute(s):

1. Zentralinstitut für Technologie (ZEA-1)

Research Program(s):

1. 1232 - Power-based Fuels and Chemicals (POF4-123) (POF4-123)

Appears in the scientific report 2023

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