Conversion of CO2 to CO by electrolysis of molten lithium carbonate

Valery Kaplan; Ellen Wachtel; Konstantin Gartsman; Yishay Feldman; Igor Lubomirsky

doi:10.1149/1.3308596

Conversion of CO₂ to CO by electrolysis of molten lithium carbonate

Valery Kaplan, Ellen Wachtel, Konstantin Gartsman, Yishay Feldman, Igor Lubomirsky

Weizmann Institute of Science, Israel

Research output: Contribution to journal › Article › peer-review

84 Citations (Scopus)

Abstract

The conversion of CO₂ to CO by electrolysis of molten Li ₂ CO₃ was investigated. Using a cell comprising a Ti cathode, a graphite anode and a source of CO₂ allows the continuous electrolysis of the melt at 900°C with current densities at the electrodes higher than 100 mA/ cm². The faradaic efficiency of the process is close to 100%, and the thermodynamic efficiency at 100 mA/ cm² is >85%. The proposed method has several advantages: (i) No precious metal is required, (ii) no hazardous or toxic by-products are produced, and (iii) the method may operate continuously, producing pure CO rather than a mixture of CO and CO₂. Therefore, the process described here has a potential application for converting electrical energy into fuel.

Original language	English
Pages (from-to)	B552-B556
Journal	Journal of the Electrochemical Society
Volume	157
Issue number	4
DOIs	https://doi.org/10.1149/1.3308596
Publication status	Published - Mar 26 2010

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Renewable Energy, Sustainability and the Environment
Surfaces, Coatings and Films
Electrochemistry
Materials Chemistry

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abstract = "The conversion of CO2 to CO by electrolysis of molten Li 2 CO3 was investigated. Using a cell comprising a Ti cathode, a graphite anode and a source of CO2 allows the continuous electrolysis of the melt at 900°C with current densities at the electrodes higher than 100 mA/ cm2. The faradaic efficiency of the process is close to 100%, and the thermodynamic efficiency at 100 mA/ cm2 is >85%. The proposed method has several advantages: (i) No precious metal is required, (ii) no hazardous or toxic by-products are produced, and (iii) the method may operate continuously, producing pure CO rather than a mixture of CO and CO2. Therefore, the process described here has a potential application for converting electrical energy into fuel.",

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T1 - Conversion of CO2 to CO by electrolysis of molten lithium carbonate

AU - Kaplan, Valery

AU - Wachtel, Ellen

AU - Gartsman, Konstantin

AU - Feldman, Yishay

AU - Lubomirsky, Igor

PY - 2010/3/26

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N2 - The conversion of CO2 to CO by electrolysis of molten Li 2 CO3 was investigated. Using a cell comprising a Ti cathode, a graphite anode and a source of CO2 allows the continuous electrolysis of the melt at 900°C with current densities at the electrodes higher than 100 mA/ cm2. The faradaic efficiency of the process is close to 100%, and the thermodynamic efficiency at 100 mA/ cm2 is >85%. The proposed method has several advantages: (i) No precious metal is required, (ii) no hazardous or toxic by-products are produced, and (iii) the method may operate continuously, producing pure CO rather than a mixture of CO and CO2. Therefore, the process described here has a potential application for converting electrical energy into fuel.

AB - The conversion of CO2 to CO by electrolysis of molten Li 2 CO3 was investigated. Using a cell comprising a Ti cathode, a graphite anode and a source of CO2 allows the continuous electrolysis of the melt at 900°C with current densities at the electrodes higher than 100 mA/ cm2. The faradaic efficiency of the process is close to 100%, and the thermodynamic efficiency at 100 mA/ cm2 is >85%. The proposed method has several advantages: (i) No precious metal is required, (ii) no hazardous or toxic by-products are produced, and (iii) the method may operate continuously, producing pure CO rather than a mixture of CO and CO2. Therefore, the process described here has a potential application for converting electrical energy into fuel.

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