Kinetics and mechanism of the chalcopyrite-pyrite concentrate oxidation process

The results of investigation of kinetics and mechanism for synthetic a-CoS oxidation process are presented in this paper. Based on experimental data obtained using DTA and XRD analysis and constructed PSD diagrams for Co-S-O system, mechanism of synthetic a-CoS oxidation process is suggested. Characteristic kinetic parameters were obtained for experimental isothermal investigations of desulfurization degree using Sharp method.

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Effect of advanced/hybrid oxidation process involving ultrasonication and ultraviolet radiation (sonophotolysis) on anthocyanin stability: degradation kinetics and mechanism

Food Chemistry ◽

10.1016/j.foodchem.2021.131083 ◽

2021 ◽

pp. 131083

Author(s):

Xiaohan Wu ◽

Qianwei Lin ◽

Tarun Belwal ◽

Hao Huang ◽

Ligen Zou ◽

...

Keyword(s):

Ultraviolet Radiation ◽

Oxidation Process ◽

Degradation Kinetics ◽

Kinetics And Mechanism ◽

Anthocyanin Stability

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Kinetics and mechanism of Sb2S3 oxidation process

Thermochimica Acta ◽

10.1016/s0040-6031(01)00688-8 ◽

2002 ◽

Vol 383 (1-2) ◽

pp. 137-143 ◽

Cited By ~ 23

Author(s):

Ž Živković ◽

N Štrbac ◽

D Živković ◽

D Grujičić ◽

B Boyanov

Keyword(s):

Oxidation Process ◽

Kinetics And Mechanism

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Oxidation process of MoOxCy to MoO3: kinetics and mechanism

Journal of Solid State Chemistry ◽

10.1016/j.jssc.2004.05.035 ◽

2004 ◽

Vol 177 (10) ◽

pp. 3281-3289 ◽

Cited By ~ 14

Author(s):

L.O. Aleman-Vázquez ◽

E. Torres-Garcı́a ◽

G. Rodrı́guez-Gattorno ◽

J. Ocotlán-Flores ◽

M.A. Camacho-López ◽

...

Keyword(s):

Oxidation Process ◽

Kinetics And Mechanism

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Control of Metal Alloy Oxidation with Electric Fields

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100071260 ◽

1973 ◽

Vol 31 ◽

pp. 164-165

Author(s):

R. R. Dils ◽

P. S. Follansbee

Keyword(s):

Electric Fields ◽

Oxidation Process ◽

Base Alloy ◽

Oxide Surface ◽

Platinum Electrodes ◽

Insulating Layer ◽

Iron Base Alloy ◽

Alloy Oxidation ◽

Aluminum Oxide Layer ◽

And Control

Electric fields have been applied across oxides growing on a high temperature alloy and control of the oxidation of the material has been demonstrated. At present, three-fold increases in the oxidation rate have been measured in accelerating fields and the oxidation process has been completely stopped in a retarding field.The experiments have been conducted with an iron-base alloy, Pe 25Cr 5A1 0.1Y, although, in principle, any alloy capable of forming an adherent aluminum oxide layer during oxidation can be used. A specimen is polished and oxidized to produce a thin, uniform insulating layer on one surface. Three platinum electrodes are sputtered on the oxide surface and the specimen is reoxidized.

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Structural Imperfections in thin Oxide Films Formed on Some Fe- and Ni-Base Alloys

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100069545 ◽

1970 ◽

Vol 28 ◽

pp. 510-511

Author(s):

L. P. Lemaire ◽

D. E. Fornwalt ◽

F. S. Pettit ◽

B. H. Kear

Keyword(s):

Oxide Scale ◽

Oxidation Process ◽

Short Circuit ◽

Protective Oxide ◽

Protective Oxide Scale ◽

Thin Oxide Films ◽

Diffusion Paths ◽

Oxidation Resistant ◽

Structural Imperfections ◽

Short Circuit Diffusion

Oxidation resistant alloys depend on the formation of a continuous layer of protective oxide scale during the oxidation process. The initial stages of oxidation of multi-component alloys can be quite complex, since numerous metal oxides can be formed. For oxidation resistance, the composition is adjusted so that selective oxidation occurs of that element whose oxide affords the most protection. Ideally, the protective oxide scale should be i) structurally perfect, so as to avoid short-circuit diffusion paths, and ii) strongly adherent to the alloy substrate, which minimizes spalling in response to thermal cycling. Small concentrations (∼ 0.1%) of certain reactive elements, such as yttrium, markedly improve the adherence of oxide scales in many alloy systems.

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