Zero-Direct-Carbon-Emission Aluminum Production by Solid Oxide Membrane-Based Electrolysis Process

Su, Shizhao; Pal, Uday B.; Guan, Xiaofei

doi:10.1007/978-3-319-48769-4_83

Cited by 3 publications

(3 citation statements)

References 36 publications

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“…• an inert metal if the desired metal is produced in the form of a gas and subsequently condensed in a separate chamber (e.g., Mg (g) produced on a steel cathode) [19,21,50], • an inert electronic conductor such as TiB 2 (e.g., for Al production) [27,51], • the desired metal itself (e.g., Ta) [20,31],…”

Section: Cathodementioning

confidence: 99%

“…A decade ago, Pal's pioneering work on new molten salt compositions increased solubility of many oxides, e.g., CaF 2 -MgF 2 eutectic molten salt dissolves *10 wt% MgO, decreased zirconia corrosion rate, and has generated new interest in commercialization of the process for metals production [19,20]. The SOM process has been applied to reduce various metal oxides or oxide compounds to the respective metals or alloys, including Mg [19,[21][22][23][24][25][26], Al [27], Ti [28], Ca [29,30], Fe [22], Cu [31], Ta [20], Cr [20], Nb [20,32], Yb [33], Nd, Pr, Dy, Si [34], CeNi 5 , and La x Ce 1-x Ni 5 [35], Ti-Fe alloy [36,37], Ti-Si intermetallics [38,39]. A series of the metals produced by the SOM process are highlighted in the periodic table presented in Fig.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Clean Metals Production by Solid Oxide Membrane Electrolysis Process

Guan

Pal

Jiang

et al. 2016

J. Sustain. Metall.

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This paper reviews a clean metals, production technology that utilizes an oxygen-ion-conducting solid oxide membrane (SOM) to directly electrolyze metal oxides dissolved in a non-consumable molten salts. During the SOM electrolysis process, the desired metal such as magnesium, aluminum, silicon, or a rare earth is produced at the cathode while pure oxygen gas evolves at the anode. Compared with current state-of-the-art metal production processes, such as a chloride-based electrolysis process for magnesium production and the Hall-Héroult process for smelting aluminum, the SOM process brings various advantages such as simplified design, lower cost, lower energy use, and zero emissions. It provides a general route for producing various metals and has great potential to replace current metals, production processes. This paper examines the past and present progress of the SOM process, the challenges faced in commercialization, and the directions for future work.

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Section: Cathodementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Clean Metals Production by Solid Oxide Membrane Electrolysis Process

Guan

Pal

Jiang

et al. 2016

J. Sustain. Metall.

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“…Molten halide salts have been used as catalysts in a number of chemical processes, , and the unit operations and system management are well understood. Molten salt catalysts have been used in extraction of ores, metal production, − catalytic coal gasification, Wacker oxidation of ethylene, diesel soot catalytic oxidation, and oxidative dehydrogenation of alkanes. ,, …”

Section: Introductionmentioning

confidence: 99%

Chlorine Production by HCl Oxidation in a Molten Chloride Salt Catalyst

Mannini

Metiu

et al. 2018

Ind. Eng. Chem. Res.

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A molten salt mixture containing 45 mol % KCl and 55 mol % CuCl2 was investigated as a catalyst for the reaction of HCl with O2 to produce Cl2. The HCl conversion for an HCl:O2 molar feed ratio of 1:2 at 450 °C and a total pressure of 1 atm was 80% at a residence time of less than 1 s in a lab scale bubble column reactor. The equilibrium conversion at this temperature and pressure is 84%. The catalyst system was found to remain stable throughout a continuous 24-h experiment. The use of a mixed transition metal/alkali metal molten salt catalyst for HCl oxidation reduces the volatility of supported chlorides and may avoid the mechanical stability limitations of solid catalysts caused by volume changes between the halide and the oxide.

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