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Wilkner K, Mücke R, Baumann S, Meulenberg WA, Guillon O. Sensitivity of Material, Microstructure and Operational Parameters on the Performance of Asymmetric Oxygen Transport Membranes: Guidance from Modeling. MEMBRANES 2022; 12:membranes12060614. [PMID: 35736321 PMCID: PMC9230686 DOI: 10.3390/membranes12060614] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/17/2022] [Revised: 06/09/2022] [Accepted: 06/11/2022] [Indexed: 02/04/2023]
Abstract
Oxygen transport membranes can enable a wide range of efficient energy and industrial applications. One goal of development is to maximize the performance by the improvement of the material, microstructural properties and operational conditions. However, the complexity of the transportation processes taking place in such commonly asymmetric membranes impedes the identification of the parameters to improve them. In this work, we present a sensitivity study that allows identification of these parameters. It is based on a 1D transport model that includes surface exchange, ionic and electronic transport inside the dense membrane, as well as binary diffusion, Knudsen diffusion and viscous flux inside the porous support. A support limitation factor is defined and its dependency on the membrane conductivity is shown. For materials with very high ambipolar conductivity the transport is limited by the porous support (in particular the pore tortuosity), whereas for materials with low ambipolar conductivity the transport is limited by the dense membrane. Moreover, the influence of total pressure and related oxygen partial pressures in the gas phase at the membrane's surfaces was revealed to be significant, which has been neglected so far in permeation test setups reported in the literature. In addition, the accuracy of each parameter's experimental determination is discussed. The model is well-suited to guiding experimentalists in developing high-performance gas separation membranes.
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Affiliation(s)
- Kai Wilkner
- Forschungszentrum Jülich GmbH, Institute of Energy and Climate Research, Materials Synthesis and Processing (IEK-1), D-52425 Jülich, Germany; (R.M.); (S.B.); (W.A.M.); (O.G.)
- Jülich Aachen Research Alliance: JARA-Energy, D-52425 Jülich, Germany
- Department of Ceramics and Refractory Materials, Institute of Mineral Engineering, RWTH Aachen University, D-52064 Aachen, Germany
- Correspondence:
| | - Robert Mücke
- Forschungszentrum Jülich GmbH, Institute of Energy and Climate Research, Materials Synthesis and Processing (IEK-1), D-52425 Jülich, Germany; (R.M.); (S.B.); (W.A.M.); (O.G.)
- Jülich Aachen Research Alliance: JARA-Energy, D-52425 Jülich, Germany
| | - Stefan Baumann
- Forschungszentrum Jülich GmbH, Institute of Energy and Climate Research, Materials Synthesis and Processing (IEK-1), D-52425 Jülich, Germany; (R.M.); (S.B.); (W.A.M.); (O.G.)
- Jülich Aachen Research Alliance: JARA-Energy, D-52425 Jülich, Germany
| | - Wilhelm Albert Meulenberg
- Forschungszentrum Jülich GmbH, Institute of Energy and Climate Research, Materials Synthesis and Processing (IEK-1), D-52425 Jülich, Germany; (R.M.); (S.B.); (W.A.M.); (O.G.)
- Jülich Aachen Research Alliance: JARA-Energy, D-52425 Jülich, Germany
- Inorganic Membranes, Faculty of Science and Technology, University of Twente, 7500 AE Enschede, The Netherlands
| | - Olivier Guillon
- Forschungszentrum Jülich GmbH, Institute of Energy and Climate Research, Materials Synthesis and Processing (IEK-1), D-52425 Jülich, Germany; (R.M.); (S.B.); (W.A.M.); (O.G.)
- Jülich Aachen Research Alliance: JARA-Energy, D-52425 Jülich, Germany
- Department of Ceramics and Refractory Materials, Institute of Mineral Engineering, RWTH Aachen University, D-52064 Aachen, Germany
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Shestakov KV, Lazarev SI, Khokhlov PA, Polyanskii KK. Predicting the Electrochemical Pressure-Driven Membrane Separation of Industrial Solutions Using Friction Theory. THEORETICAL FOUNDATIONS OF CHEMICAL ENGINEERING 2021. [DOI: 10.1134/s0040579521050304] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Effect of Asymmetric Membrane Structure on Hydrogen Transport Resistance and Performance of a Catalytic Membrane Reactor for Ethanol Steam Reforming. MEMBRANES 2021; 11:membranes11050332. [PMID: 33946242 PMCID: PMC8146230 DOI: 10.3390/membranes11050332] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/11/2021] [Revised: 04/25/2021] [Accepted: 04/27/2021] [Indexed: 12/02/2022]
Abstract
The performance of catalytic membrane reactors (CMRs) depends on the specific details of interactions at different levels between catalytic and separation parts. A clear understanding of decisive factors affecting their operational parameters can be provided via mathematical simulations. In the present paper, main results of numerical studies of ethanol steam reforming, followed by downstream hydrogen permeation through an asymmetric supported membrane, are reported. The membrane module consists of a thin selective layer supported on a substrate with graded porous structure. One-dimensional isothermal reaction–transport model for the CMR has been developed, and its validation has been carried out by using performance data from a lab-scale reactor with a disk-shaped membrane. Simulations demonstrate the model’s capabilities to analyze local concentrations gradients, as required to provide accurate estimates of the relationship between structure–property–performance. It was shown that transport properties of multilayer asymmetric membranes are highly related to the structural properties of each single layer.
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