Results 81 to 90 of about 11,716 (244)

Deposition of FeOOH Layer on Ultrathin Hematite Nanoflakes to Promote Photoelectrochemical Water Splitting

Micromachines
Hematite is one of the most promising photoanode materials for the study of photoelectrochemical (PEC) water splitting because of its ideal bandgap with sufficient visible light absorption and stability in alkaline electrolytes.
Wenyao Zhang, Ya Zhang, Xiao Miao, Ling Zhao, Changqing Zhu   +4 more
doaj   +1 more source

Hydrogen‐Based Reduction of Hematitic Iron Ore in a Fluidized Bed Kinetic Reactor at Elevated Pressures

steel research international, EarlyView.
This study investigates the reduction behavior of two international iron ores, including a synthetic hematite produced by oxidation of magnetite, in a novel fluidized‐bed kinetic reactor at elevated pressures. The reduction takes place at various temperatures (650°C, 700°C, and 750°C), and various hydrogen partial pressures (30, 55, and 80 vol% H2 ...
Valentina Nigitz, Aaron Wieder, Sandra Jezernik, Christoph Ahr, Mark Berchtold, Franz Winter   +5 more
wiley   +1 more source

Experimental and Computational Investigation of Slag–Refractory Interactions Under Conditions Relevant to Hydrogen Plasma Smelting Reduction

steel research international, EarlyView.
This study investigates how slag interacts with magnesia–carbon (MgO–C) refractories under conditions relevant to hydrogen plasma smelting reduction. High‐temperature refractory wear tests are combined with thermodynamic modeling to examine refractory dissolution into slag and slag infiltration into the refractory.
Eeli‐Matti Sassi, Eetu‐Pekka Heikkinen, Tero Vuolio, Riku Mattila, Ville‐Valtteri Visuri   +4 more
wiley   +1 more source

Isothermal Reduction Behavior and Microstructural Evolution of Iron Ore Sinter Under Simulated Radial Blast Furnace Gas Atmospheres With Hydrogen Injection

steel research international, EarlyView.
Commercial iron ore sinter is reduced isothermally under operation‐derived radial blast furnace gas atmospheres with and without 20 kg H2/tHM injection. Hydrogen improves reduction at 900–1100 °C, whereas at 700 °C the high H2O content limits the wüstite‐to‐iron driving force.
Ahmed Abdelrahim, Sherif Hegazy, Mikko Iljana, Aki Koskela, Carmen van der Kroon, Timo Fabritius   +5 more
wiley   +1 more source

Integration of Micro‐CT and XRF Mapping for Multimodal 3D Analysis of Polychrome Wooden Artifacts

X-Ray Spectrometry, EarlyView.
ABSTRACT Over the past 5 years, computer applications have become crucial to archeological research. Since the 1990s, the focus has transitioned from data management tools to the development of virtual models. Recently, digital documentation of cultural heritage has gained considerable focus, with 3D modeling of objects.
Josiane E. Cavalcante, Olga Araujo, Alessandra Machado, Roberta M. P. S. Borges, Isis V. N. S. Franzi, Anderson G. de Paula, Roberta Leitão, Marcelino dos Anjos, Renato Freitas, Ricardo T. Lopes, Davi F. Oliveira   +10 more
wiley   +1 more source

Effect of Magnetized Treated Water on Flotation of Fine Hematite

Kuangchan zonghe liyong
This is an article in the field of mineral processing engineering. In order to promote the application of magnetization treatment in iron ore flotation and provide a certain basis for the construction of magnetization treatment theoretical system, the ...
Fengjiu LI, Yaran KONG, Liucheng ZHAO
doaj   +1 more source

Toward Silica‐Free Compliance: A Low‐Viscosity Sample Pretreatment Methodology for Crystalline Quartz Quantification in Viscous Pastes

X-Ray Spectrometry, EarlyView.
ABSTRACT Crystalline quartz, the most common crystalline silica polymorph, is widely found in industrial products. It is of high regulatory relevance, because its fine fraction, a form of respirable crystalline silica, is classified as an occupational carcinogen, with product‐content thresholds (e.g., 0.1% (w/w) in the European Union) and stringent ...
Giacomo Siviero, Michelle Buoso, Diego Andreola, Giulia Moro   +3 more
wiley   +1 more source

In situ mapping of iron oxidation in laminar metal fuel flames using X‐ray absorption spectroscopy

Journal of Synchrotron Radiation, EarlyView.
For the first time an iron metal flame has been mapped by in situ X‐ray absorption spectroscopy. Strong gradients in oxidation state and phase composition across the metallic core and the flame front were found with FeO peaking at the visible flame front and Fe3O4 forming further beyond.Metal fuels such as iron are promising carbon‐free energy carriers
Lukas Braun, Fabian P. Hagen, Michal Fedoryk, Malte Seitz, Björn Stelzner, Dimosthenis Trimis, Jan-Dierk Grunwaldt, Dmitry E. Doronkin   +7 more
wiley   +1 more source

Reducing acquisition time and radiation damage: data‐driven subsampling for spectro‐microscopy

Journal of Synchrotron Radiation, EarlyView.
Data‐driven sparse acquisition in spectro‐microscopy reduces acquisition time and radiation dose while preserving information.Spectro‐microscopy is an experimental technique which can be used to observe spatial variations in chemical state and changes in chemical state over time or under experimental conditions.
Maike Meier, Lorenzo Lazzarino, Boris Shustin, Hussam Al Daas, Paul Quinn   +4 more
wiley   +1 more source

Soil wetting and drying processes influence stone artefact distribution in clay‐rich soils: A case study from Middle Gidley Island in Murujuga, northwest Western Australia

Archaeometry, EarlyView.
Abstract Soils that contain swelling clay minerals (e.g., montmorillonite) expand and contract during wetting and drying, causing movement within the soil profile. This process, known as argilliturbation, can alter artefact distributions, destroy stratigraphy and complicate the interpretation of archaeological deposits.
Caroline Mather, Matthias Leopold, Kaitlin Sullivan, Kane Ditchfield, Tom Horrocks, Luke Gliganic, Emma Beckett, Diana Patalwala, Emielda Yusiharni, Michael Smirk, William Hiscock, Jo McDonald   +11 more
wiley   +1 more source