Blar i SINTEF Open på forfatter "Bredesen, Rune"
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Investigation of La1−xSrxCrO3−∂ (x ~ 0.1) as Membrane for Hydrogen Production
Larring, Yngve; Vigen, Camilla Kaori; Ahouanto, Florian; Fontaine, Marie-Laure; Peters, Thijs; Smith, Jens Bragdø; Norby, Truls; Bredesen, Rune (Peer reviewed; Journal article, 2012)Various inorganic membranes have demonstrated good capability to separate hydrogen from other gases at elevated temperatures. Hydrogen-permeable, dense, mixed proton-electron conducting ceramic oxides offer superior ... -
Nanocomposites of few-layer graphene oxide and alumina by density functional theory calculations
Polfus, Jonathan M.; Løvvik, Ole Martin; Rørvik, Per Martin; Bredesen, Rune (Peer reviewed; Journal article, 2016)The atomistic and electronic structure and oxygen stoichiometry of nanocomposites between alumina and graphene oxide were investigated by density functional theory calculations. The nanocomposite was described as interfaces ... -
New insight to the effects of heat treatment in air on the permeation properties of thin Pd77%Ag23% membranes
Vicinanza, Nicla; Svenum, Ingeborg-Helene; Peters, Thijs; Bredesen, Rune; Venvik, Hilde Johnsen (Peer reviewed; Journal article, 2018)Sputtered Pd77%Ag23% membranes of thickness 2.2–8.5 µm were subjected to a three-step heat treatment in air (HTA) to investigate the relation between thickness and the reported beneficial effects of HTA on hydrogen transport. ... -
Oxygen permeation and creep behavior of Ca1-xSrxTi0.6Fe0.15Mn0.25O3-δ (x=0, 0.5) membrane materials
Polfus, Jonathan M.; Xing, Wen; Pecanac, Goran; Fossdal, Anita; Hanetho, Sidsel Meli; Larring, Yngve; Malzbender, Jürgen; Fontaine, Marie-Laure; Bredesen, Rune (Peer reviewed; Journal article, 2016)Oxygen permeation measurements were performed on dense symmetric samples of Ca0.5Sr0.5Ti0.6Fe0.15Mn0.25O3−δ and compared to CaTi0.6Fe0.15Mn0.25O3−δ in order to assess the influence of the perovskite lattice volume on oxygen ... -
Palladium (Pd) membranes as key enabling technology for precombustion CO2 capture and hydrogen production
Peters, Thijs; Rørvik, Per Martin; Sunde, Tor Olav Løveng; Stange, Marit Synnøve Sæverud; Roness, Frode; Reinertsen, Torkild; Ræder, Henrik; Larring, Yngve; Bredesen, Rune (Peer reviewed; Journal article, 2017)Palladium (Pd) membranes are a promising enabling technology for power generation and hydrogen production with CO2 capture. SINTEF has developed and patented a flexible technology to produce Pd-alloy membranes that ... -
Proton segregation and space-charge at the BaZrO3 (0 0 1)/MgO (0 0 1) heterointerface
Polfus, Jonathan M.; Norby, Truls Eivind; Bredesen, Rune (Peer reviewed; Journal article, 2016)Y-doped BaZrO3 (BZY) can be deposited epitaxially on MgO (0 0 1) and the considered interface serves as a model system for studying heterointerface properties of protonic conductors. In this study, the defect chemistry of ... -
Protons in Oxysulfates, and Sulfides: A First-Principles Study of La2O2S, La2O2SO4, SrZrS3, and BaZrS3
Polfus, Jonathan M.; Norby, Truls; Bredesen, Rune (Peer reviewed; Journal article, 2015)Sulfur-containing materials may be of importance in devices such as proton conducting fuel cells for energy conversion involving fossil or bioderived fuels. First-principles calculations were employed to elucidate the ... -
Stability investigation of micro-configured Pd-Ag membrane modules - Effect of operating temperature and pressure
Peters, Thijs; Stange, Marit Synnøve Sæverud; Sunding, Martin Fleissner; Bredesen, Rune (Peer reviewed; Journal article, 2015)The long-term stability over a period of up to 50 days has been reported for various designs of microstructured Pd77Ag23 membrane modules for H2 production and purification. Even though microchannels provide sufficient ... -
Thickness dependent effects of solubility and surface phenomena on the hydrogen transport properties of sputtered Pd77%Ag23% thin film membranes
Vicinanza, Nicla; Svenum, Ingeborg-Helene; Næss, Live Nova; Peters, Thijs; Bredesen, Rune; Borg, Anne; Venvik, Hilde Johnsen (Peer reviewed; Journal article, 2015)The hydrogen solubility and permeation in Pd77%Ag23% membranes have been determined as a function of temperature and membrane thickness. Unexpectedly, the solubility of hydrogen is found to systematically increase as the ... -
Vacancy diffusion in palladium hydrides
Polfus, Jonathan; Peters, Thijs; Bredesen, Rune; Løvvik, Ole Martin (Peer reviewed; Journal article, 2021)The self-diffusion coefficients of palladium in PdHx (x = 0, 0.25, 0.5, 0.75, 1) were studied using density functional theory to obtain the required thermodynamic and kinetic parameters. The enthalpy of migration decreased ...