Perflourocarbon Generation during Electrolysis in Molten Fluorides

Guihua Wang, Xiangsheng Wang, Hongmin Zhu

Research output: Chapter in Book/Report/Conference proceedingChapter

1 Citation (Scopus)

Abstract

The anode process of carbon electrode in fluoride melt was studied by voltammetry and chronoamperometry. Anode gases were analyzed by gas chromatography on-line during controlled-potential electrolysis. Two peaks were observed on the cyclic voltammograms. According to the results of gas chromatography, the first peak was corresponded to the discharge of residual oxide ions, with the formation of CO and CO2. Discharge of fluoride ions occurred at 4.1 V vs. Li+/Li, and leading to the anode effect. With the occurrence of anode effect, small amount of CF4 was detected. As the potential reached 4.5 V, CF4 and C2F6 gas evolution occurred, and the current increased to form the second peak.

Original languageEnglish
Title of host publicationEnergy Technology 2011
Subtitle of host publicationCarbon Dioxide and Other Greenhouse Gas Reduction Metallurgy and Waste Heat Recovery
PublisherJohn Wiley and Sons
Pages131-135
Number of pages5
ISBN (Print)9781118036518
DOIs
Publication statusPublished - 2011 Apr 19
Externally publishedYes

Keywords

  • Electrochemical methods
  • Fluoride
  • Gas chromatography
  • PFC emission

ASJC Scopus subject areas

  • Materials Science(all)

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