Open AccessPreparation procedure to obtain iron nanopowder under non-isothermal conditions
Author(s) -
Тиен Хиеп Нгуен,
Ван Минь Нгуен,
Мань Хунг Нгуен,
Виталий Николаевич Данчук
Publication year - 2021
Publication title -
žurnal belorusskogo gosudarstvennogo universiteta. himiâ
Language(s) - English
Resource type - Journals
eISSN - 2617-3980
pISSN - 2520-257X
DOI - 10.33581/2520-257x-2021-1-28-35
Subject(s) - isothermal process , materials science , activation energy , kinetics , nanoparticle , reduction (mathematics) , chemical engineering , hydrogen , metallurgy , nanotechnology , thermodynamics , chemistry , mathematics , organic chemistry , physics , geometry , quantum mechanics , engineering
The kinetics for the procedure of preparing iron nanopowder from α-FeOOH by hydrogen reduction under non-isothermal conditions were studied. The reduction of α-FeOOH nanopowder was shown to occur within the temperature range from 180 to 550 °С, with a maximum specific rate value attained at 500 °С. The activation energy for the reduction process α-FeOOH nanopowder was measured to be ~43 kJ/mol, evidencing a mixed reaction mode. Performing the reduction of α-FeOOH at 500 °С accelerated the process while ensuring the required properties of the product obtained. The Fe nanoparticles thus prepared were of rounded shape, the size ranging from 70 to 100 nm.