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    Optimization of membrane stack configuration for efficient hydrogen production in microbial reverse-electrodialysis electrolysis cells coupled with thermolytic solutions

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    Type
    Article
    Authors
    Luo, Xi
    Nam, Joo-Youn
    Zhang, Fang cc
    Zhang, Xiaoyuan cc
    Liang, Peng
    Huang, Xia
    Logan, Bruce E.
    KAUST Grant Number
    KUS-I1-003-13
    Date
    2013-07
    Permanent link to this record
    http://hdl.handle.net/10754/599100
    
    Metadata
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    Abstract
    Waste heat can be captured as electrical energy to drive hydrogen evolution in microbial reverse-electrodialysis electrolysis cells (MRECs) by using thermolytic solutions such as ammonium bicarbonate. To determine the optimal membrane stack configuration for efficient hydrogen production in MRECs using ammonium bicarbonate solutions, different numbers of cell pairs and stack arrangements were tested. The optimum number of cell pairs was determined to be five based on MREC performance and a desire to minimize capital costs. The stack arrangement was altered by placing an extra low concentration chamber adjacent to anode chamber to reduce ammonia crossover. This additional chamber decreased ammonia nitrogen losses into anolyte by 60%, increased the coulombic efficiency to 83%, and improved the hydrogen yield to a maximum of 3.5mol H2/mol acetate, with an overall energy efficiency of 27%. These results improve the MREC process, making it a more efficient method for renewable hydrogen gas production. © 2013 Elsevier Ltd.
    Citation
    Luo X, Nam J-Y, Zhang F, Zhang X, Liang P, et al. (2013) Optimization of membrane stack configuration for efficient hydrogen production in microbial reverse-electrodialysis electrolysis cells coupled with thermolytic solutions. Bioresource Technology 140: 399–405. Available: http://dx.doi.org/10.1016/j.biortech.2013.04.097.
    Sponsors
    This research was supported by Award KUS-I1-003-13 from the King Abdullah University of Science and Technology (KAUST), the National High Technology Research and Development Program of China (863 Program) (No. 2011AA060907) and a scholarship from the China Scholarship Council (CSC).
    Publisher
    Elsevier BV
    Journal
    Bioresource Technology
    DOI
    10.1016/j.biortech.2013.04.097
    PubMed ID
    23711946
    ae974a485f413a2113503eed53cd6c53
    10.1016/j.biortech.2013.04.097
    Scopus Count
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