Production of C2 hydrocarbons and H2 from CH4 in a proton conducting cell

The production of C2 hydrocarbons and H2 from methane was studied in a proton conducting cell-reactor, at 973–1153K and atmospheric pressure. Under open-circuit, the La0.6Sr0.4Co0.8Fe0.2O3 (LSCF) catalyst (anode) was found to be active towards both, H2 and C2 formation. Under closed-circuit, when protons were “pumped” away from the catalyst, an increase in C2's and H2 production was observed. The fraction of produced H2 that was transported to the cathode reached values as high as 95%. In the fuel cell operation mode and at the maximum power output, the C2 formation rate exceeded the open circuit rate by up to 20%. ► La0.6Sr0.4Co0.8Fe0.2O3 was an adequate electrode for H2/C2 production from CH4. ► Up to 95% of produced H2 separated and transported to the cathode. ► A cogenerative cell producing C2 hydrocarbons from CH4 was demonstrated. ► At highest power density, the C2 rate was 20% higher than the open-circuit rate.