Electrochemical reduction of CO2 at temperatures below 300°C

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Abstract

Reduction of CO2 at intermediate temperatures (T<300°C) is a tempting way to produce hydrocarbons. One benefit of performing CO2 reduction below 300°C is that it would possibly allow a single process for production of hydrocarbons. CsH2PO4, BaHPO4 and a composite thereof have been investigated as electrolyte materials both with respect to thermal stability and to conductivity. BaHPO4 showed an improved thermal stability compared to CsH2PO4, but it did at the same time exhibit a low conductivity (1·10-6 S cm-1 at 304°C). CsH2PO4 started to dehydrate at 249°C, but this dehydration was shown to be reversible. Its conductivity was measured to be 2·10-2 S cm-1 at 240°C. Full cells with copper as the CO2 reduction catalyst have been manufactured and tested in CO2 containing atmospheres. Initial performance of 34 mA cm-2 at 245°C has been achieved. ©The Electrochemical Society.

Original languageEnglish
JournalE C S Transactions
Volume41
Issue number33
Pages (from-to)61-73
ISSN1938-5862
DOIs
Publication statusPublished - 2012
Event220th ECS Meeting - Boston, MA, United States
Duration: 9 Oct 201114 Oct 2011
Conference number: 220
http://www.electrochem.org/meetings/biannual/220/220.htm

Conference

Conference220th ECS Meeting
Number220
CountryUnited States
CityBoston, MA
Period09/10/201114/10/2011
Internet address

Bibliographical note

1st International Symposium on Electrochemical Synthesis of Fuels (ESF 2011)

Keywords

  • Electrolytic reduction
  • Hydrocarbons
  • Thermodynamic stability
  • Carbon dioxide

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