Výsledky vyhledávání - "Ralf Kriegel"

Testing of high performance asymmetric tubular BSCF membranes under pressurized operation – A proof-of-concept study on a 7 tube module

Autor: Qiang Hu, Stéven Pirou, Kurt Engelbrecht, Ralf Kriegel, Ute Pippardt, Lutz Kiesel, Qinglei Sun, Ragnar Kiebach

Publikováno v: Hu, Q, Pirou, S, Engelbrecht, K, Kriegel, R, Pippardt, U, Kiesel, L, Sun, Q & Kiebach, R 2022, ' Testing of high performance asymmetric tubular BSCF membranes under pressurized operation – A proof-of-concept study on a 7 tube module ', Journal of Membrane Science, vol. 644, 120176 . https://doi.org/10.1016/j.memsci.2021.120176

Oxygen transport membranes are a possible low-cost alternative to cryogenic air separation units or pressure swing adsorption for oxygen production, and could facilitate carbon capture by oxy-fuel combustion processes. In this work, a proof-of-concep

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8a801d0bed2feed12dbd2b470ab2919f
https://orbit.dtu.dk/en/publications/ae81e756-f8f8-42e9-91eb-5c38bba0d14f

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Asymmetric Ba0.5Sr0.5Co0.8Fe0.2O3-Δ Membrane for Oxygen Permeation: Synergetic Fabrication By Magnetron Sputtering Deposition and Selective Laser Annealing

Autor: Basma Mewafy, Blanca I. Arias Serrano, Jan Wallis, Martin Rohloff, Javier Silva, Olga Ravkina, Robert Kircheisen, Ralf Kriegel, Jens Wartmann, Angela Kruth

Publikováno v: ECS Meeting Abstracts. :871-871

The Ba0.5Sr0.5Co0.8Fe0.2O3-δ (BSCF) mixed ionic electronic conductor (MIEC) is considered to be one of the most promising perovskite-based materials for oxygen transport exhibiting high oxygen permeability. Such oxygen-permeable perovskite membrane

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::108a4698842e4a3d771116cef651d44b
https://doi.org/10.1149/ma2022-0218871mtgabs

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Impact of extrusion parameters on the mechanical performance of tubular BSCF-supports for asymmetric oxygen transporting membranes

Autor: R. Hoffmann, U. Pippardt, Ralf Kriegel

Publikováno v: Journal of Membrane Science. :61-68

Tubular asymmetric membranes based on BSCF (Ba0.5Sr0.5Co0.8Fe0.2O3-δ) are well-known for high O2 permeability, but there use in first pilot plants for small scale O2 production is constricted by low fracture strength. Therefore, ceramic shaping of p

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7a58dacce25d01f3263ed34eeb3b4364
https://doi.org/10.1016/j.memsci.2018.10.019

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57Fe Mössbauer study into oxygen vacancy disorder in (Ba0.5Sr0.5)(Co0.8Fe0.2)O3−

Autor: Piotr Gaczynski, A. Harpf, R. Kircheisen, Ralf Kriegel, Klaus-Dieter Becker, J. Böer

Publikováno v: Solid State Ionics. 316:59-65

A 57 Fe Mossbauer study of mixed ionic electronic conducting (Ba 0.5 Sr 0.5 )(Co 0.8 57 Fe 0.08 Fe 0.12 )O 3− δ (BSCF) has been made on samples of different oxygen content. The room-temperature spectra are found to depend strongly on oxygen stoich

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::dd0730a223d9a8f83fba7d22fa7ffab3
https://doi.org/10.1016/j.ssi.2017.12.005

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Roadmap for Sustainable Mixed Ionic‐Electronic Conducting Membranes

Publikováno v: Advanced Functional Materials. 32:2105702

Mixed ionic-electronic conducting (MIEC) membranes have gained growing interest recently for various promising environmental and energy applications, such as H2 and O2 production, CO2 reduction, O2 and H2 separation, CO2 separation, membrane reactors

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d6a48b9aefd95c81e1ad1314a6616c7c
https://doi.org/10.1002/adfm.202105702

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A high-temperature 57Fe Mössbauer study of (Ba0.5Sr0.5)(Co0.8Fe0.2)O3−

Autor: R. Kircheisen, Piotr Gaczynski, J. Böer, Klaus-Dieter Becker, A. Harpf, Ralf Kriegel

Publikováno v: Solid State Ionics. 369:115659

An in-situ 57Fe Mossbauer study of mixed ionic electronic conducting (Ba0.5Sr0.5)(Co0.857Fe0.08Fe0.12)O3−δ (BSCF5582) has been made at temperatures up to 1000 °C. In the paramagnetic high-temperature phase (T ≥ 315 °C), quadrupolar interaction

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::9bd3ff2d0cde7c633e1a126c14963f40
https://doi.org/10.1016/j.ssi.2021.115659

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Impact of sintering temperature on permeation and long-term development of support structure and stability for asymmetric oxygen transporting BSCF membranes

Autor: U. Pippardt, R. Hoffmann, Ralf Kriegel

Mechanical stability of asymmetric Ba0.5Sr0.5Co0.8Fe0.2O3-d (BSCF) membrane tubes was improved by adaption of extrusion parameters and sintering conditions. The development of pore network and microstructure was investigated after long-term exposure

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::66579210fdc8a39db6128d128611888b
https://publica.fraunhofer.de/handle/publica/257128

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Joining of ceramic Ba0.5Sr0.5Co0.8Fe0.2O3 membranes for oxygen production to high temperature alloys

Autor: Jens Kluge, Kurt Engelbrecht, Ragnar Kiebach, Ralf Kriegel, Kawai Kwok, Peter Vang Hendriksen, Falk Schulze-Küppers, Patrick Niehoff, Sebastian Molin, Martin Søgaard

Publikováno v: Journal of membrane science 506, 11-21 (2016). doi:10.1016/j.memsci.2016.01.050

The possibility of joining dense ceramic BCSF tubular membranes to metal alloys using a silver braze was investigated. Four different alloys (Crofer 22 APU®, Kanthal APM®, Haynes 214® and EN 1.4841) were considered and the influence of their oxide

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ff1776986eac749494cc9d4986f42d44
https://doi.org/10.1016/j.memsci.2016.01.050

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