Results 1 to 10 of about 1,318,053 (287)

Hydrogen reduction of spent lithium-ion battery cathode material for metal recovery: Mechanism and kinetics [PDF]

open access: yesFrontiers in Chemistry, 2022
Hydrogen reduction is becoming a promising method for recycling lithium-ion battery cathode materials. However, the reaction mechanism and kinetics during hydrogen reduction are unclear, requiring further investigation.
Zhu Huang   +10 more
doaj   +2 more sources

Chemical and mineralogical characterization of Kahnuj ilmenite concentrate and investigation of its reduction behavior in pure hydrogen gas [PDF]

open access: yesمواد نوین, 2023
Introduction: Ilmenite is considered the most important source of titanium and its oxide and is usually processed by sulfate, chloride, and smelting processes. In all these processes, incomplete removal of iron combined with titanium is the main problem.
Leila Ghasemi   +3 more
doaj   +1 more source

A Robust Recovery of Ni From Laterite Ore Promoted by Sodium Thiosulfate Through Hydrogen-Thermal Reduction

open access: yesFrontiers in Chemistry, 2021
Laterite ore is one of the important sources of nickel (Ni). However, it is difficult to liberate Ni from ore structure during reduction roasting. This paper provided an effective way for a robust recovery of Ni from laterite ore by H2 reduction using ...
Shoujun Liu   +16 more
doaj   +1 more source

Ti/Co co-doped O3-Na(Ni0.3Fe0.2Mn0.5)0.85Ti0.1Co0.05O2 with high rate and durable cathode material for sodium-ion batteries

open access: yesMaterials Research Express, 2023
O3-type layered oxides are widely investigated as cathodes for Na-ion batteries (SIBs) due to their high theoretical capacities and splendid initial Coulombic efficiency.
Jiangfeng Wang   +5 more
doaj   +1 more source

Plasma-Chemical Disposal of Silicon and Germanium Tetrachlorides Waste by Hydrogen Reduction

open access: yesSci, 2023
The processes of hydrogen reduction of silicon and germanium chlorides under the conditions of high-frequency (40.68 MHz) counteracted arc discharge stabilized between two rod electrodes are investigated.
Roman Kornev   +9 more
doaj   +1 more source

Kinetics of the hydrogen reduction process of nickel oxide nanopowder in non-isothermal conditions [PDF]

open access: yesМеталознавство та обробка металів, 2020
In this work the kinetics of the hydrogen reduction process of nickel oxide nanopowder in non-isothermal conditions were studied. NiO nanopowder was prepared in advance by thermal decomposition at 300°C of nickel hydroxide Ni(OH)2. Ni(OH)2 nanopowder was
Tien Hiep Nguyen
doaj   +1 more source

Preparation of ultrafine Mo powders by MoO3 pre-reduction with insufficient carbon and hydrogen deep reduction

open access: yesFenmo yejin jishu, 2021
The pre-reduction molybdenum powders containing minor amount of MoO2 were prepared by the carbothermic reduction of MoO3, using the carbon black as the reducing agent, then the obtained pre-reduction molybdenum powders were deep reduced by hydrogen to ...
ZHANG Yong, ZHANG Guo-Hua, CHOU Kuo-Chih
doaj   +1 more source

Effect of an External Magnetic Field on the Hydrogen Reduction of Magnetite Nanoparticles in a Polymer Matrix

open access: yesMagnetochemistry, 2023
A hybrid electromagnetic nanomaterial, which is a matrix based on a conjugated polymer of poly-3-amine-7-methylamine-2-methylphenazine with dispersed magnetite nanoparticles immobilized on multi-walled carbon nanotubes, has been synthesized.
Petr Chernavskii   +4 more
doaj   +1 more source

Effect of cathodic hydrogen charging on the surface of duplex stainless steel [PDF]

open access: yes, 1993
The effect of cathodic hydrogen charging on the mechanical properties of steels has been extensively investigated (1-5). There is a general agreement, that cathodic harging during a tensile test leads to reduction in ductility, and embrittlement (5-7 ...
Gadgil, V.J., Geijselaers, H.J.M.
core   +14 more sources

Reduction of Industrial Nickel Oxides with a Hydrogen Bearing Gas Between 523 and 673 K [PDF]

open access: yesArchives of Metallurgy and Materials, 2016
Reduction of three industrial nickel oxides (Goro, Tokyo and Sinter 75) with a hydrogen bearing gas was revisited in the temperature interval from 523 to 673 K (250 to 400°C). A pronounced incubation period is observed in the temperature interval tested.
G. Plascencia
doaj   +1 more source

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