Exploratory Studies on Electrolysis of AlN Dissolved in Molten Salts

Bonomi, Antonio; Hadate, M.; Breda, F.; Gentaz, C.

doi:10.1149/1.2123727

Cited by 9 publications

(2 citation statements)

References 4 publications

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“…In the case of AlN electrolysis, the problem includes finding the appropriate electrolytes that can dissolve the very stable AlN (s) . There was a cursory study (Bonomi et al , 1982) which suggested the use of Li 3 N.3AlN.4LiCl electrolyte to dissolve AlN (s) , but no further results have been forthcoming.…”

Section: Thermodynamic Analyses Of Al Extraction From Intermediate Co...mentioning

confidence: 99%

Alternative Al production methods

Dewan

Rhamdhani

Brooks

et al. 2013

Mineral Processing and Extractive Metallurgy

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It has been widely claimed that direct and indirect carbothermic reduction of alumina for the production of aluminium have the potential to consume less energy, generate fewer perfluorocarbons and have lower total greenhouse gas emissions compared to the Hall-Hé roult process. A review of alternative aluminium production techniques focusing on the indirect carbothermal reduction routes has been presented in the Part 1 paper. In this Part 2 paper, systematic thermodynamic analyses of indirect carbothermal reduction routes are presented. These include the analyses of the Stage 1 of the process where alumina is converted to intermediate aluminium compounds before they are further reduced to aluminium metal in the subsequent stages. The results suggested that in the Stage 1, high alumina conversion at the process conditions studied can be achieved through three process routes: halide (chloride), nitride and sulphide routes. Thermodynamic analyses were also carried out for the Stage 2 where the intermediate aluminium nitride, chlorides or sulphides are reduced to aluminium through thermal dissociation, thermal disproportionation and/or electrolysis. Analysis of the results suggests aluminium may be extracted from AlN using thermal dissociation, while disproportionation and electrolysis are more suitable for AlCl 3 and Al 2 S 3 .

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Section: Thermodynamic Analyses Of Al Extraction From Intermediate Co...mentioning

confidence: 99%

Alternative Al production methods

Dewan

Rhamdhani

Brooks

et al. 2013

Mineral Processing and Extractive Metallurgy

View full text Add to dashboard Cite

show abstract

“…One of the major challenges is to find the appropriate electrolytes that can dissolve the very stable AlN (s) . Bonomi et al (1982) carried out a limited study on the solubility and the electrolysis of AlN in molten salt (Li 3 N-LiCl) bath at 660-700uC. The current efficiency for this system was 83% with a cathodic current density of y1?5 A cm 2 .…”

Section: Extraction Of Al From Al Nitridementioning

confidence: 99%

Alternative Al production methods

Rhamdhani

Dewan

Brooks

et al. 2013

Mineral Processing and Extractive Metallurgy

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The production of Al from its ores at present relies on the Bayer (alumina production) and the Hall-Heroult (Al production) process. The cost associated with alumina production and apparent disadvantages of the Hall-Heroult process have led to intensive research to find alternative routes for Al production. The direct carbothermal reduction process has been thoroughly investigated as an alternative technique. Another alternative includes the indirect carbothermal reduction route where alumina (or aluminous ores) is first reduced to intermediate Al compounds before reduced further to Al. The present study reviews and provides systematic thermodynamic analyses of alternative Al production routes. In this paper (Part 1), a comprehensive review of alternative Al production techniques focusing on the indirect carbothermal reduction routes is presented. These include carbochlorination, carbonitridation and carbosulphidation routes for the formation of intermediate Al compounds, followed by various Al extraction processes.

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