Item


Assessment of biotic and abiotic graphite cathodes for hydrogen production in microbial electrolysis cells

Hydrogen represents a promising clean fuel for future applications. The biocathode of a two-chambered microbial electrolysis cell (biotic MEC) was studied and compared with an abiotic cathode (abiotic MEC) in order to assess the influence of naturally selected microorganisms for hydrogen production in a wide range of cathode potentials (from -400 to -1800 mV vs SHE). Hydrogen production in both MECs increased when cathode potential was decreased. Microorganisms present in the biotic MEC were identified as Hoeflea sp. and Aquiflexum sp. Supplied energy was utilized more efficiently in the biotic MEC than in the abiotic, obtaining higher hydrogen production respect to energy consumption. At -1000 mV biotic MEC produced 0.89 ± 0.10 m3 H2 d-1 m-3NCC (Net Cathodic Compartment) at a minimum operational cost of 3.2 USD kg-1 H2. This cost is lower than the estimated market value for hydrogen (6 USD kg-1 H 2)

This research was financially supported by the Spanish Government (CTQ 2011-23632, CTQ 2011-24114)

© International Journal of Hydrogen Energy, 2014, vol. 39, núm. 3, p. 1297-1305

Elsevier

Author: Batlle Vilanova, Pau
Puig Broch, Sebastià
González Olmos, Rafael
Vilajeliu Pons, Anna
Bañeras Vives, Lluís
Balaguer i Condom, Maria Dolors
Colprim Galceran, Jesús
Date: 2014 January 16
Abstract: Hydrogen represents a promising clean fuel for future applications. The biocathode of a two-chambered microbial electrolysis cell (biotic MEC) was studied and compared with an abiotic cathode (abiotic MEC) in order to assess the influence of naturally selected microorganisms for hydrogen production in a wide range of cathode potentials (from -400 to -1800 mV vs SHE). Hydrogen production in both MECs increased when cathode potential was decreased. Microorganisms present in the biotic MEC were identified as Hoeflea sp. and Aquiflexum sp. Supplied energy was utilized more efficiently in the biotic MEC than in the abiotic, obtaining higher hydrogen production respect to energy consumption. At -1000 mV biotic MEC produced 0.89 ± 0.10 m3 H2 d-1 m-3NCC (Net Cathodic Compartment) at a minimum operational cost of 3.2 USD kg-1 H2. This cost is lower than the estimated market value for hydrogen (6 USD kg-1 H 2)
This research was financially supported by the Spanish Government (CTQ 2011-23632, CTQ 2011-24114)
Format: application/pdf
ISSN: 0360-3199
Document access: http://hdl.handle.net/10256/13783
Language: eng
Publisher: Elsevier
Collection: MICINN/PN 2012-2014/CTQ2011-23632
MICINN/PN 2012-2015/CTQ2011-24114
Reproducció digital del document publicat a: http://dx.doi.org/10.1016/j.ijhydene.2013.11.017
Articles publicats (D-EQATA)
Is part of: © International Journal of Hydrogen Energy, 2014, vol. 39, núm. 3, p. 1297-1305
Rights: Tots els drets reservats
Subject: Hidrogen -- Biotecnologia
Hydrogen -- Biotechnology
Bioelectrònica
Bioelectronics
Title: Assessment of biotic and abiotic graphite cathodes for hydrogen production in microbial electrolysis cells
Type: info:eu-repo/semantics/article
Repository: DUGiDocs

Subjects

Authors