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- W2951865023 abstract "Molten oxide electrolysis (MOE) has been identifiedby the American Iron and Steel Institute (AISI) as one of fourpossible breakthrough technologies to alleviate the environmentalimpact of iron and steel production. This process has also beenidentified by the National Aeronautics and Space Administration(NASA) as a means to produce oxygen gas, as well as iron andsilicon raw materials on the Moon. MOE produces iron byelectrolysis of an iron oxide containing electrolyte. Theelectrolysis results in the production of pure iron metal at thecathode and pure oxygen gas at the anode. Because of the low vaporpressure of the electrolyte at temperatures above 1538°C, MOE canbe performed above the melting temperature of iron. The productionof liquid metal, ready for continuous casting, is a prerequisitefor any industrial-scale extractive metallurgical process.Therefore, if an inert anode can be identified, MOE could provide aan industrial process to produce iron from its ore with pure oxygengas as the only direct emission. The feasibility of MOE as acarbon-neutral process hinges on the identification of an inertanode material. Therefore, the scope of this study was to determinethe criteria of an inert anode for MOE, identify candidatematerials, and evaluate the performance of these materials.Previous studies of MOE at MIT found iridium, a platinum groupmetal, to be an excellent candidate for an inert anode. The highcost of iridium makes it an unlikely candidate for a commercialiron production process. However, iridium provides a likelycandidate for lunar production of oxygen, or high-purity ironproduction. Furthermore, the use of iridium on the laboratory-scaleprovides a widely available inert anode material to facilitate thestudy of other areas of MOE. Therefore, unique anode morphologieswere evaluated as a means to reduce the economical strain of usingan iridium anode. In addition to iridium, a wide array of readilyavailable, high-temperature electrode materials were tested. Due tothe highly corrosive environment of MOE, none of the readilyavailable materials tested are compatible with the process. It isbelieved that the most likely candidate for an inert anode lies inan engineered material, composed of a refractory substrate and anoxide passivation layer. Therefore, the criteria for such amaterial were determined and likely candidates arediscussed." @default.
- W2951865023 created "2019-06-27" @default.
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- W2951865023 date "2010-01-01" @default.
- W2951865023 modified "2023-09-23" @default.
- W2951865023 title "Candidate anode materials for iron production by moltenoxide electrolysis; Candidate anode materials for iron production byMOE" @default.
- W2951865023 hasPublicationYear "2010" @default.
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