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Title: Efficient W and Mo deposition and separation with simultaneous hydrogen production in stacked bioelectrochemical systems
Authors: Huang, Liping
Li, Ming
Pan, Yuzhen
Shi, Yong
Quan, Xie
Li Puma, Gianluca
Keywords: Bioelectrochemical system
Stackable reactor
Tungsten and molybdenum deposition
Separation factor
Hydrogen production
Issue Date: 2017
Publisher: © Elsevier
Citation: HUANG, L. ...et al., 2017. Efficient W and Mo deposition and separation with simultaneous hydrogen production in stacked bioelectrochemical systems. Chemical Engineering Journal, 327, pp. 584-596.
Abstract: © 2017 Elsevier B.V. Efficient deposition and separation of W(VI) and Mo(VI) with simultaneous hydrogen production, without external energy input, is achieved in stacked bioelectrochemical systems (BESs) composed of microbial fuel cells (MFCs) and microbial electrolysis cells (MECs). The stacked BES-3-1 made of one MEC unit (1#) serially connected with three parallel connected MFC units (2#) outperformed other modules, achieving depositions of 27.6 ± 1.2% (W) and 75.4 ± 2.1% (Mo) with a separation factor of 8.1 ± 0.2 and hydrogen production of 0.34 ± 0.01 m 3 /m 3  d in the 1# unit, compared to 12.3 ± 0.9% (W), 52.6  ± 2.2% (Mo) and 7.9 ± 0.5 (separation factor) in the 2# unit. The control experiments with W(VI) only deposited 6.8 ± 1.3% in 1# and 3.3 ± 0.4% in 2#, compared to 65.1 ± 3.2% in 1# and 45.2 ± 0.9% in 2# with Mo(VI) only. The control experiments with either the 1# or 2# unit and a mixture of W(VI) and Mo(VI) deposited 15.3 ± 1.7% (W) and 60.1 ± 1.6% (Mo) (1# only), and 12.9 ± 1.3% (W) and 56.1 ± 2.0% (Mo) (2# only). Reuse of the catholyte after acidification achieved complete separation of W and Mo from one another. This study demonstrates the feasibility of stacked BESs for W and Mo deposition and separation with simultaneous hydrogen production. The dual benefits of W(VI) and Mo(VI) species, and the favorable impact of the 2# unit on the 1# unit in the stacked BES module were critical to achieve efficient performance.
Description: This paper was accepted for publication in the journal Chemical Engineering Journal and the definitive published version is available at http://dx.doi.org/10.1016/j.cej.2017.06.149
Sponsor: The authors gratefully acknowledge financial support from the National Natural Science Foundation of China (No. 51578104), and the Programme of Introducing Talents of Discipline to University (B13012).
Version: Accepted for publication
DOI: 10.1016/j.cej.2017.06.149
URI: https://dspace.lboro.ac.uk/2134/26137
Publisher Link: http://dx.doi.org/10.1016/j.cej.2017.06.149
ISSN: 1385-8947
Appears in Collections:Published Articles (Chemical Engineering)

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