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Title: Electrolyte chemistry control in electrodialysis processing

Methods for controlling electrolyte chemistry in electrodialysis units having an anode and a cathode each in an electrolyte of a selected concentration and a membrane stack disposed therebetween. The membrane stack includes pairs of cationic selective and anionic membranes to segregate increasingly dilute salts streams from concentrated salts stream. Electrolyte chemistry control is via use of at least one of following techniques: a single calcium exclusionary cationic selective membrane at a cathode cell boundary, an exclusionary membrane configured as a hydraulically isolated scavenger cell, a multivalent scavenger co-electrolyte and combinations thereof.
Inventors:
;
Issue Date:
OSTI Identifier:
1415031
Assignee:
Gas Technology Institute (Des Plaines, IL) NETL
Patent Number(s):
9,849,426
Application Number:
14/616,262
Contract Number:
AC26-07NT42677
Resource Relation:
Patent File Date: 2015 Feb 06
Research Org:
National Energy Technology Lab. (NETL), Pittsburgh, PA, and Morgantown, WV (United States)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY

Works referenced in this record:

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Transport properties of a commercial cation-exchange membrane in contact with divalent cations or proton-divalent cation solutions during electrodialysis
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