TY - JOUR
T1 - Powering microbial electrolysis cells by capacitor circuits charged using microbial fuel cell
AU - Hatzell, Marta C.
AU - Kim, Younggy
AU - Logan, Bruce E.
N1 - KAUST Repository Item: Exported on 2020-10-01
Acknowledged KAUST grant number(s): KUS-I1-003-13
Acknowledgements: This research was supported by funding through the King Abdullah University of Science and Technology (KAUST) (Award KUS-I1-003-13), and by the National Science Foundation Graduate Research Fellowship Program.
This publication acknowledges KAUST support, but has no KAUST affiliated authors.
PY - 2013/5
Y1 - 2013/5
N2 - A microbial electrolysis cell (MEC) was powered by a capacitor based energy storage circuit using energy from a microbial fuel cell (MFC) to increase MEC hydrogen production rates compared to that possible by the MFC alone. To prevent voltage reversal, MFCs charged the capacitors in a parallel configuration, and then the capacitors were discharged in series to boost the voltage that was used to power the MECs. The optimal capacitance for charging was found to be ∼0.01 F for each MFC. The use of the capacitor charging system increased energy recoveries from 9 to 13%, and hydrogen production rates increased from 0.31 to 0.72 m3 m-3-day-1, compared to coupled systems without capacitors. The circuit efficiency (the ratio of the energy that was discharged to the MEC to the energy provided to the capacitor from the MFCs) was ∼90%. These results provide an improved method for linking MFCs to MECs for renewable hydrogen gas production. © 2012 Elsevier B.V. All rights reserved.
AB - A microbial electrolysis cell (MEC) was powered by a capacitor based energy storage circuit using energy from a microbial fuel cell (MFC) to increase MEC hydrogen production rates compared to that possible by the MFC alone. To prevent voltage reversal, MFCs charged the capacitors in a parallel configuration, and then the capacitors were discharged in series to boost the voltage that was used to power the MECs. The optimal capacitance for charging was found to be ∼0.01 F for each MFC. The use of the capacitor charging system increased energy recoveries from 9 to 13%, and hydrogen production rates increased from 0.31 to 0.72 m3 m-3-day-1, compared to coupled systems without capacitors. The circuit efficiency (the ratio of the energy that was discharged to the MEC to the energy provided to the capacitor from the MFCs) was ∼90%. These results provide an improved method for linking MFCs to MECs for renewable hydrogen gas production. © 2012 Elsevier B.V. All rights reserved.
UR - http://hdl.handle.net/10754/599352
UR - https://linkinghub.elsevier.com/retrieve/pii/S0378775312018289
UR - http://www.scopus.com/inward/record.url?scp=84872080222&partnerID=8YFLogxK
U2 - 10.1016/j.jpowsour.2012.12.006
DO - 10.1016/j.jpowsour.2012.12.006
M3 - Article
SN - 0378-7753
VL - 229
SP - 198
EP - 202
JO - Journal of Power Sources
JF - Journal of Power Sources
ER -