title: Evaluation of hydrogen production and internal resistance in forward osmosis membrane integrated microbial electrolysis cells.
abstract: In order to enhance hydrogen production by facilitated proton transport through a forward osmosis (FO) membrane, the FO membrane was integrated into microbial electrolysis cells (MECs). An improved hydrogen production rate was obtained in the FO-MEC (12.5±1.84×10(-3)m(3)H2/m(3)/d) compared to that of the cation exchange membrane (CEM) - MEC (4.42±0.04×10(-3)m(3)H2/m(3)/d) during batch tests (72h). After an internal resistance analysis, it was confirmed that the enhanced hydrogen production in FO-MEC was attributed to the smaller charge transfer resistance than in the CEM-MEC (90.3Ω and 133.4Ω respectively). The calculation of partial internal resistance concluded that the transport resistance can be substantially reduced by replacing a CEM with a FO membrane; decrease of the resistance from 0.069Ωm(2) to 5.99×10(-4)Ωm(2).
authors.affiliation: School of Environmental Science and Engineering Gwangju, Institute of Science and Technology (GIST), 123 Cheomdan-gwagiro, Buk-gu, Gwangju 500-712, South Korea.
authors.forename: Mi-Young
authors.initials: MY
authors.lastname: Lee
authors.affiliation: Department of Civil & Environmental Engineering, The Pennsylvania State University, University Park, PA 16802, United States.
authors.forename: Kyoung-Yeol
authors.initials: KY
authors.lastname: Kim
authors.affiliation: School of Environmental Science and Engineering Gwangju, Institute of Science and Technology (GIST), 123 Cheomdan-gwagiro, Buk-gu, Gwangju 500-712, South Korea.
authors.forename: Euntae
authors.initials: E
authors.lastname: Yang
authors.affiliation: School of Environmental Science and Engineering Gwangju, Institute of Science and Technology (GIST), 123 Cheomdan-gwagiro, Buk-gu, Gwangju 500-712, South Korea. Electronic address: iskim@gist.ac.kr.
authors.forename: In S
authors.initials: IS
authors.lastname: Kim
mesh_terms: D001674:Bioelectric Energy Sources / Q000382:microbiology*; D019149:Bioreactors / Q000382:microbiology*; D004572:Electrolysis / Q000295:instrumentation*; D004867:Equipment Design; D019544:Equipment Failure Analysis; D006859:Hydrogen / Q000302:isolation & purification* / Q000378:metabolism*; D008567:Membranes, Artificial; D009995:Osmosis; D012212:Rheology / Q000295:instrumentation; D018511:Systems Integration
chemical_list: D008567:Membranes, Artificial; D006859:Hydrogen
keywords: Electrochemical impedance spectroscopy; Forward osmosis membrane integrated microbial electrolysis cell; Hydrogen production; Internal resistance