Electrowinning Magnesium Metal from MgCl2-NdOCl Melt Using Solid-Oxide Oxygen-Ion-Conducting Membrane Technology

The reaction mechanism of electrochemical extraction of FexTi alloys direct from natural ilmenite in molten CaCl2has been investigated. The electrochemical deoxidation experiment process was carried out at 1000 °C and 3.8 V, and a solid oxide oxygen-ion-conducting membrane (SOM) filled with carbon-saturated liquid metal was served as the inert anode of the electrolytic cell. The macro-/micro-structure variations of the samples during electrolysis were investigated. The reaction routes from natural ilmenite to FexTi alloys are proposed and discussed. It is found that element Fe is reduced firstly from ilmenite and thus serves as electronic conductor to accelerate subsequent deoxidation, FexTi alloys can be produced directly from natural ilmenite by electrolysis in molten salt. It is suggested that FexTi phase can be formed directly from FexTiOycompounds and/or from deoxidation-generated Ti and Fe through various reaction routes.

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Green Electrochemical Process Solid-Oxide Oxygen-Ion-Conducting Membrane (SOM): Direct Extraction of Ti-Fe Alloys from Natural Ilmenite

Metallurgical and Materials Transactions B ◽

10.1007/s11663-012-9633-7 ◽

2012 ◽

Vol 43 (3) ◽

pp. 503-512 ◽

Cited By ~ 45

Author(s):

Xionggang Lu ◽

Xingli Zou ◽

Chonghe Li ◽

Qingdong Zhong ◽

Weizhong Ding ◽

...

Keyword(s):

Electrochemical Process ◽

Solid Oxide ◽

Direct Extraction ◽

Oxygen Ion ◽

Fe Alloys ◽

Ion Conducting

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Enhanced Sulfur Tolerance of Nickel-Based Anodes for Oxygen-Ion Conducting Solid Oxide Fuel Cells by Incorporating a Secondary Water Storing Phase

Environmental Science & Technology ◽

10.1021/es503603w ◽

2014 ◽

Vol 48 (20) ◽

pp. 12427-12434 ◽

Cited By ~ 18

Author(s):

Feng Wang ◽

Wei Wang ◽

Jifa Qu ◽

Yijun Zhong ◽

Mose O. Tade ◽

...

Keyword(s):

Fuel Cells ◽

Solid Oxide Fuel Cells ◽

Solid Oxide ◽

Oxide Fuel ◽

Sulfur Tolerance ◽

Oxygen Ion ◽

Ion Conducting

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Direct synthesis of methane from CO2/H2O in an oxygen-ion conducting solid oxide electrolyser

Energy & Environmental Science ◽

10.1039/c1ee01035b ◽

2011 ◽

Vol 4 (6) ◽

pp. 2218 ◽

Cited By ~ 118

Author(s):

Kui Xie ◽

Yaoqing Zhang ◽

Guangyao Meng ◽

John T. S. Irvine

Keyword(s):

Direct Synthesis ◽

Solid Oxide ◽

Oxygen Ion ◽

Ion Conducting

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Electro-Reduction of Ilmenite to FexTi Alloys in Molten CaCl2

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.548-549.172 ◽

2014 ◽

Vol 548-549 ◽

pp. 172-176

Author(s):

Xing Li Zou ◽

Xiong Gang Lu ◽

Wei Xiao ◽

Shan Lin Gu ◽

Bin Shen

Keyword(s):

Phase Composition ◽

Reaction Mechanism ◽

Reduction Process ◽

Solid Oxide ◽

Particle Sizes ◽

Green Method ◽

Oxygen Ion ◽

Ti Alloys ◽

Reduction Experiment ◽

Ion Conducting

This paper reports the preparation of FexTi alloys from natural ilmenite by electro-reduction in molten CaCl2. The electro-reduction experiment was carried out at 1000 °C and potential of 3.8 V, and an inert solid oxide oxygen-ion-conducting membrane (SOM) anode system was used to control the electrochemical experiment. The phase composition and morphology of the final product were investigated. The reaction mechanism involved in the electro-reduction process is discussed based on our experimental results and thermodynamic analysis. It is suggested that FexTi alloys powder with different Fe contents (FexTi, 0 ≤ x ≤ 2) and particle sizes can be obtained by controlling electrolysis conditions strictly. The result implies that the SOM process is a promising green method for the preparation of ferrotitanium alloys direct from natural ilmenite.

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