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

76 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

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ASJC Scopus subject areas

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

Cite this

Kaplan, V., Wachtel, E., Gartsman, K., Feldman, Y., & Lubomirsky, I. (2010). Conversion of CO₂ to CO by electrolysis of molten lithium carbonate. Journal of the Electrochemical Society, 157(4), B552-B556. https://doi.org/10.1149/1.3308596

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10.1149/1.3308596