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Oral Presentation 7-04
Development of a New Wafer Based Process for
Electrodeionization of High Fructose Corn
Syrup
Michael P. Henry1,
Paula R. Moon1, Yupo J. Lin1, Carl D. Landahl1,
James R. Frank1,
Seth W. Snyder1, Rathin Datta2,
Dennis Burke2, Robert Moore3, James Cornelissen4 1Argonne National Laboratory Chemical and Biological Technology Energy Systems Division Argonne, IL 60439
2ED Sep, Inc.
3The Purolite Company
4A. E. Staley Telephone: (630) 252-7939; Fax: (630) 252-9281; E-mail: seth@anl.gov
Salt
removal can be one of the most energy intensive and costly processes in the
chemical, pharmaceutical, agriprocessing, water conditioning, and environmental
remediation industries. Typically, salt is removed by ion exchange (IX)
columns, which require the use of acids and bases to regenerate the resins —
thereby generating a significant amount of chemical waste. Electrodeionization
(EDI) has long been recognized as a potential replacement for ion exchange in a
variety of processes. Traditionally EDI
has employed loosely packed ion exchange resins placed between ionic membranes
and an electrical current is used to drive the salt separation from the desired
product. This approach leads to extensive leaking, product loss, and
inefficient electrical current utilization. We developed a technology to mold
the ion exchange resin into porous wafers, and engineered new EDI flow and
sealing systems. This wafer-based EDI
allows rapid separation of the salt with almost no leakage and efficient
electrical current utilization. The new
EDI system was demonstrated at the laboratory and pilot scales with dextrose
feed. The demonstration revealed desalting performance equivalent to that of
commercial ion exchange, with ~ 90% reduction in chemical and process water
usage in comparison to IX, and product loss of less than 0.1% (as good or
better than IX). Other applications of
wafer-based EDI in process industries are under consideration.
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