Using Flow Electrodes in Multiple Reactors in Series for Continuous Energy Generation from Capacitive Mixing

Handle URI:
http://hdl.handle.net/10754/600150
Title:
Using Flow Electrodes in Multiple Reactors in Series for Continuous Energy Generation from Capacitive Mixing
Authors:
Hatzell, Marta C.; Hatzell, Kelsey B.; Logan, Bruce E.
Abstract:
Efficient conversion of “mixing energy” to electricity through capacitive mixing (CapMix) has been limited by low energy recoveries, low power densities, and noncontinuous energy production resulting from intermittent charging and discharging cycles. We show here that a CapMix system based on a four-reactor process with flow electrodes can generate constant and continuous energy, providing a more flexible platform for harvesting mixing energy. The power densities were dependent on the flow-electrode carbon loading, with 5.8 ± 0.2 mW m–2 continuously produced in the charging reactor and 3.3 ± 0.4 mW m–2 produced in the discharging reactor (9.2 ± 0.6 mW m–2 for the whole system) when the flow-electrode carbon loading was 15%. Additionally, when the flow-electrode electrolyte ion concentration increased from 10 to 20 g L–1, the total power density of the whole system (charging and discharging) increased to 50.9 ± 2.5 mW m–2.
Citation:
Hatzell MC, Hatzell KB, Logan BE (2014) Using Flow Electrodes in Multiple Reactors in Series for Continuous Energy Generation from Capacitive Mixing. Environ Sci Technol Lett 1: 474–478. Available: http://dx.doi.org/10.1021/ez5003314.
Publisher:
American Chemical Society (ACS)
Journal:
Environmental Science & Technology Letters
KAUST Grant Number:
KUS-I1-003-13
Issue Date:
9-Dec-2014
DOI:
10.1021/ez5003314
Type:
Article
ISSN:
2328-8930; 2328-8930
Sponsors:
Funding for this work was provided by a National Science Foundation Graduate Research Fellowship to M.C.H. (Grant DGE1255832) and K.B.H. (Grant DGE1002809) and a grant from the King Abdullah University of Science and Technology (KAUST) (Award KUS-I1-003-13).
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Full metadata record

DC FieldValue Language
dc.contributor.authorHatzell, Marta C.en
dc.contributor.authorHatzell, Kelsey B.en
dc.contributor.authorLogan, Bruce E.en
dc.date.accessioned2016-02-28T06:43:46Zen
dc.date.available2016-02-28T06:43:46Zen
dc.date.issued2014-12-09en
dc.identifier.citationHatzell MC, Hatzell KB, Logan BE (2014) Using Flow Electrodes in Multiple Reactors in Series for Continuous Energy Generation from Capacitive Mixing. Environ Sci Technol Lett 1: 474–478. Available: http://dx.doi.org/10.1021/ez5003314.en
dc.identifier.issn2328-8930en
dc.identifier.issn2328-8930en
dc.identifier.doi10.1021/ez5003314en
dc.identifier.urihttp://hdl.handle.net/10754/600150en
dc.description.abstractEfficient conversion of “mixing energy” to electricity through capacitive mixing (CapMix) has been limited by low energy recoveries, low power densities, and noncontinuous energy production resulting from intermittent charging and discharging cycles. We show here that a CapMix system based on a four-reactor process with flow electrodes can generate constant and continuous energy, providing a more flexible platform for harvesting mixing energy. The power densities were dependent on the flow-electrode carbon loading, with 5.8 ± 0.2 mW m–2 continuously produced in the charging reactor and 3.3 ± 0.4 mW m–2 produced in the discharging reactor (9.2 ± 0.6 mW m–2 for the whole system) when the flow-electrode carbon loading was 15%. Additionally, when the flow-electrode electrolyte ion concentration increased from 10 to 20 g L–1, the total power density of the whole system (charging and discharging) increased to 50.9 ± 2.5 mW m–2.en
dc.description.sponsorshipFunding for this work was provided by a National Science Foundation Graduate Research Fellowship to M.C.H. (Grant DGE1255832) and K.B.H. (Grant DGE1002809) and a grant from the King Abdullah University of Science and Technology (KAUST) (Award KUS-I1-003-13).en
dc.publisherAmerican Chemical Society (ACS)en
dc.titleUsing Flow Electrodes in Multiple Reactors in Series for Continuous Energy Generation from Capacitive Mixingen
dc.typeArticleen
dc.identifier.journalEnvironmental Science & Technology Lettersen
dc.contributor.institutionDepartment of Mechanical and Nuclear Engineering, The Pennsylvania State University, University Park, Pennsylvania 16802, United Statesen
dc.contributor.institutionDepartment of Material Science and Engineering, Drexel University, Philadelphia, Pennsylvania 19104, United Statesen
dc.contributor.institutionDepartment of Civil and Environmental Engineering, 212 Sackett Building, The Pennsylvania State University, University Park, Pennsylvania 16802, United Statesen
kaust.grant.numberKUS-I1-003-13en
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