Calculation of Copper, Nickel, and Cobalt Reduction Rate With Carbon Monoxide Out of Oxide Melts

Лямкин, С. А.; Selivanov, E. N.; Semenova, N. S.

doi:10.17073/0021-3438-2014-2-26-29

Izv.VUZ. Tsvet. Met.

2015

DOI: 10.17073/0021-3438-2014-2-26-29

|View full text |Cite

Calculation of Copper, Nickel, and Cobalt Reduction Rate With Carbon Monoxide Out of Oxide Melts

С. А. Лямкин¹,

E. N. Selivanov²,

N. S. Semenova³

Abstract: Взаимодействие газа-восстановителя (СО) с оксидным расплавом протекает в ряде технологических процессов. Однако в литературе отсутствует метод расчета скорости восстановления металлов монооксидом углерода из жидких шлаков. В настоящей работе выведено кинетическое уравнение для расчета скорости восстановительного процесса в кинетическом режиме, учитывающее влияние концентраций реагирующих компонентов в контактирующих фазах. КАЧЕСТВЕННАЯ КАРТИНА ВЗАИМОДЕЙСТВИЯ ОКСИДНОГО РАСПЛАВА С ГАЗОВОЙ ФАЗОЙ Взаимодействие ок… Show more

Help me understand this report

Search citation statements

Order By: Relevance

Paper Sections

Select...

Citation Types

Supporting

Mentioning

Contrasting

Year Published

2021

2023

Publication Types

Select...

Article2

Relationship

Self Cite0

Independent2

Authors

Journals

Cited by 2 publications

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

Study on the kinetics of process for obtaining cobalt nanopowder by hydrogen reduction under isothermal conditions

Tien

2021

Izv.VUZ. Tsvet. Met.

View full text Add to dashboard Cite

The kinetics of metallic cobalt nanopowder synthesizing by hydrogen reduction from Co(OH)2 nanopowder under isothermal conditions were studied. Co(OH)2 nanopowder was prepared in advance by chemical deposition from aqueous solutions of Co(NO3)2 cobalt nitrate (10 wt.%) and NaOH alkali (10 wt.%) at room temperature, pH = 9 under continuous stirring. The hydrogen reduction of Co(OH)2 nanopowder under isothermal conditions was carried out in a tube furnace in the temperature range from 270 to 310 °C. The crystal structure and composition of powders was studied by X-ray phase analysis. The specific surface area of samples was measured using the BET method by low-temperature nitrogen adsorption. The average particle size of powders was determined by the measured specific surface area. Particles size characteristics and morphology were investigated by transmission and scanning electron microscopes. Kinetic parameters of Co(OH)2 hydrogen reduction under isothermal conditions were calculated using the Gray–Weddington model and Arrhenius equation. It was found that the rate constant of reduction at t = 310 °C is approximately 1.93 times higher than at 270 °C, so the process accelerates by 1.58 times for 40 min of reduction. The activation energy of cobalt nanopowder synthesizing from Co(OH)2 by hydrogen reduction is ~40 kJ/mol, which indicates a mixed reaction mode. It was shown that cobalt nanoparticles obtained by the hydrogen reduction of its hydroxide at 280 °C are aggregates of equiaxed particles up to 100 nm in size where individual particles are connected to several neighboring particles by contact isthmuses.

show abstract

Study on the kinetics of process for obtaining cobalt nanopowder by hydrogen reduction under isothermal conditions

Tien

2021

Izv.VUZ. Tsvet. Met.

View full text Add to dashboard Cite

show abstract

A comparative study on the influence of heating modes on the properties of cobalt and nickel nanopowders produced by the chemical-metallurgy method

Nguyên

Nguyen²,

Nguyen

et al. 2023

EJSI

View full text Add to dashboard Cite

The effect of heating modes on the properties of Co and Ni nanopowders obtained by the chemical-metallurgy method was compared. It was shown that all established heating modes (isothermal, non-isothermal and mixed) ensure the production of Co and Ni nanopowders with an average size of less than 100 nm, while the mixed regime makes it possible to obtain reduction products with the best characteristics in terms of dispersion and morphology.

show abstract

scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.

Contact Info

hi@scite.ai

10624 S. Eastern Ave., Ste. A-614

Henderson, NV 89052, USA

Blog Terms and Conditions API Terms Privacy Policy Contact Cookie Preferences Do Not Sell or Share My Personal Information

Made with 💙 for researchers

Part of the Research Solutions Family.

Calculation of Copper, Nickel, and Cobalt Reduction Rate With Carbon Monoxide Out of Oxide Melts

Cited by 2 publications

References 0 publications

Study on the kinetics of process for obtaining cobalt nanopowder by hydrogen reduction under isothermal conditions

Study on the kinetics of process for obtaining cobalt nanopowder by hydrogen reduction under isothermal conditions

A comparative study on the influence of heating modes on the properties of cobalt and nickel nanopowders produced by the chemical-metallurgy method

Contact Info

Product

Resources

About