Co-electrolysis of Biohythane using Solid Oxide Fuel Cell Technology

Activity: Talk or presentationOral presentation

Description

Two-stage anaerobic digestion enables the production of
biohythane, which is composed of 60/30/10 vol% CH4/CO2/H2 and
is easier and more beneficial to utilize than conventional biogas
(60/40 vol% CH4/CO2). This study has investigated co-electrolysis
of biohythane with H2O and CO2 using an anode-supported solid
oxide fuel cell. The kinetic performance of the cell was
characterized using I-V curves and electrochemical impedance
spectroscopy. The output gases from the anode were characterized
using quadrupole mass spectrometry. The work has shown that
addition of 10 vol% H2 to CH4/CO2 feedstocks markedly improves
the overall performance of the cell in electrolysis mode. Coelectrolyzing
with H2O gave the highest performance, highest
syngas (H2 + CO) yield (87%) and highest H2/CO ratio (2.69). Coelectrolyzing
with CO2 decreased the catalytic and electrochemical
conversion of reactants, giving lower performance, lower syngas
yields (79%) and lower H2/CO ratios (0.87). Enhanced
performance with H2O was due to a mixture of increased catalytic
and electrochemical conversion of reactants.
PeriodSep 2019
Event title16th International Symposium on Solid Oxide Fuel Cells (SOFC-XVI)
Event typeConference
Conference number16
LocationKyoto, Japan
Degree of RecognitionInternational