ISSN 2594-5327
75° Congresso Anual da ABM — vol. 75, num.75 (2022)
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IN THE INDUSTRIAL PRODUCTION OF RARE EARTH METALS, THE DISSOLUTION RATE OF THEIR OXIDES IN MOLTEN FLUORIDE SALTS IS A CRUCIAL PARAMETER FOR THE MINIMIZATION OF BOTH PERFLUOROCARBON EMISSIONS AND THE FORMATION OF SCALE IN ELECTROLYTIC CELLS. THIS WORK DESCRIBES A NEW METHODOLOGY DEVELOPED AT IPT TO DETERMINE THE DISSOLUTION RATE, BASED ON LOW VOLTAGE CHRONOAMPEROMETRY, FAR FROM CONDITIONS OF CRITICAL CURRENT DENSITY. THIS METHODOLOGY DIFFERS FROM THE VOLTAMETRIC TECHNIQUES FROM LITERATURE BECAUSE IT CAN BE IMPLEMENTED WITH EQUIPMENT RATED FOR LOW CURRENT AND VOLTAGE AMPLITUDES. RESULTS SHOW THAT THE MAGNITUDE OF THE MEASUREMENT UNCERTAINTY WAS SIMILAR TO THAT OF THE METHODS BASED ON VOLTAMMETRY, HOWEVER WITH A MORE SCALABLE AND LESS EXPENSIVE SYSTEM
IN THE INDUSTRIAL PRODUCTION OF RARE EARTH METALS, THE DISSOLUTION RATE OF THEIR OXIDES IN MOLTEN FLUORIDE SALTS IS A CRUCIAL PARAMETER FOR THE MINIMIZATION OF BOTH PERFLUOROCARBON EMISSIONS AND THE FORMATION OF SCALE IN ELECTROLYTIC CELLS. THIS WORK DESCRIBES A NEW METHODOLOGY DEVELOPED AT IPT TO DETERMINE THE DISSOLUTION RATE, BASED ON LOW VOLTAGE CHRONOAMPEROMETRY, FAR FROM CONDITIONS OF CRITICAL CURRENT DENSITY. THIS METHODOLOGY DIFFERS FROM THE VOLTAMETRIC TECHNIQUES FROM LITERATURE BECAUSE IT CAN BE IMPLEMENTED WITH EQUIPMENT RATED FOR LOW CURRENT AND VOLTAGE AMPLITUDES. RESULTS SHOW THAT THE MAGNITUDE OF THE MEASUREMENT UNCERTAINTY WAS SIMILAR TO THAT OF THE METHODS BASED ON VOLTAMMETRY, HOWEVER WITH A MORE SCALABLE AND LESS EXPENSIVE SYSTEM
Palavras-chave
Dissolution rate; Neodimium oxide; Chronoamperometry; Voltammetry
Dissolution rate; Neodimium oxide; Chronoamperometry; Voltammetry
Como citar
Fusco, Filipe;
Nahat, Rafael Augusto Theodoro Pereira de Souza;
Santos, Celia Aparecida Lino dos;
Silva, André Luiz Nunis da;
Araujo, Rogério de Melo Ribeiro de.
METHODOLOGY OF DETERMINATION OF THE DISSOLUTION RATE OF RARE EARTH OXIDES IN MOLTEN FLUORIDES
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p. 263-273.
In: 75° Congresso Anual da ABM,
São Paulo,
2022.
ISSN: 2594-5327
, DOI 10.5151/2594-5327-34303
