Reverse electrodialysis(RED)is an emerging membrane-based technology for the production of renewable energy from mixing waters with different salinities.Herein,the impact of the stack configuration on the Ohmic and non-Ohmic resistances as well as the performance of RED were systematically studied by using in situ electrochemical impedance spectroscopy(EIS).Three different parameters(membrane type,number of cell pairs and spacer design)were controlled.The Ohmic and non-Ohmic resistances were evaluated for RED stacks equipped with two types of commercial membranes(Type Ⅰ and Type Ⅱ)supplied by Fujifilm Manufacturing Europe B.V:Type Ⅰ Fuji membranes displayed higher Ohmic and non-Ohmic resistances than Type Ⅱ membranes,which was mainly attributed to the difference in fixed charge density.The output power of the stack was observed to decrease with the increasing number of cell pairs mainly due to the increase in ionic shortcut currents.With the reduction in spacer thickness from 750 to 200 μm,the permselectivity of membranes in the stack decreased from 0.86 to 0.79 whereas the energy efficiency losses increased from 31％to 49％.Overall,the output of the present study provides a basis for understanding the impact of stack design on internal losses during the scaling-up of RED.

Wenjuan Zhang;Bo Han;Ramato Ashu Tufa;Chuyang Tang;Xunuo Liu;Ge Zhang;Jing Chang;Rui Zhang;Rong Mu;Caihong Liu;Dan Song;Junjing Li;Jun Ma;Yufeng Zhang

Tianjin Key Laboratory of Aquatic Science and Technology,School of Environmental and Municipal Engineering,Tianjin Chengjian University,Tianjin 300384,China;State Key Laboratory of Urban Water Resource and Environment,Harbin Institute of Technology,Harbin 150090,China;Department of Inorganic Technology,University of Chemistry and Technology Prague,Technicka 5,166 28,Prague 6,Czech Republic;Department of Civil Engineering,the University of Hong Kong,Hong Kong,China;Key Laboratory of Eco-environments in Three Gorges Reservoir Region(Ministry of Education),School of Urban Construction and Environmental Engineering,Chongqing University,Chongqing 400044,China;School of Environmental Science and Engineering,Tianjin Polytechnic University,Tianjin 300387,China

环境科学与工程前沿

[1]Wenjuan Zhang;Bo Han;Ramato Ashu Tufa;Chuyang Tang;Xunuo Liu;Ge Zhang;Jing Chang;Rui Zhang;Rong Mu;Caihong Liu;Dan Song;Junjing Li;Jun Ma;Yufeng Zhang-.Tracing the impact of stack configuration on interface resistances in reverse electrodialysis by in situ electrochemical impedance spectroscopy)[J].环境科学与工程前沿,2022(04):69-80

Fujifilm,permselectivity

Tracing,impact,configuration,interface,resistances,reverse,electrodialysis,by,situ,electrochemical,impedance,spectroscopy,Reverse,RED,emerging,technology,production,renewable,energy,from,mixing,waters,different,salinities,Herein,Ohmic,well,performance,were,systematically,studied,using,EIS,Three,parameters,number,cell,pairs,spacer,design,controlled,evaluated,stacks,equipped,two,types,commercial,membranes,Type,supplied,Manufacturing,Europe,displayed,higher,than,which,was,mainly,attributed,difference,fixed,charge,density,output,power,observed,increasing,due,ionic,shortcut,currents,With,reduction,thickness,decreased,whereas,efficiency,losses,increased,Overall,present,study,provides,basis,understanding,internal,during,scaling

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