Evaluation of hydrogen production and internal resistance in forward osmosis membrane integrated microbial electrolysis cells. (July 2015)

• Record Type: Journal Article
• Authors: Lee, Mi-Young; Kim, Kyoung-Yeol; Yang, Euntae; Kim, In S.
• Is Part Of: Bioresource technology. Volume 187(2015)
• Page Start: 106
• Page End: 112
• Publication Date: 2015-07
• Subjects: Forward osmosis membrane integrated microbial electrolysis cell -- Hydrogen production -- Electrochemical impedance spectroscopy -- Internal resistance; Biomass -- Periodicals; Biomass energy -- Periodicals; Bioremediation -- Periodicals; Agricultural wastes -- Periodicals; Factory and trade waste -- Periodicals; Organic wastes -- Periodicals; Bioénergie -- Périodiques; Déchets agricoles -- Périodiques; Déchets industriels -- Périodiques; Déchets organiques -- Périodiques; Déchets (Combustible) -- Périodiques; 662.88
• DOI: 10.1016/j.biortech.2015.03.079
• Languages: English
• ISSNs: 0960-8524

Abstract

Abstract : Highlights: A combined system of MEC and FO process was proposed. Enhanced hydrogen production rate was achieved by applying FO process in MEC. The internal resistance was reduced by replacement of CEM to FO membrane. The resistance for transport across FO membrane was significantly low in MEC. 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 (72 h). 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 (90.3 Ω and 133.4 Ω 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 0.069 Ω m 2 to 5.99 × 10 −4 Ω m 2 .