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Related Experiment Videos

De-icers derived from corn steep water.

Byung Yun Yang1, Rex Montgomery

  • 1Department of Biochemistry, College of Medicine, University of Iowa, Iowa City, IA 52242, USA.

Bioresource Technology
|October 25, 2003
PubMed
Summary
This summary is machine-generated.

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Corn steep water (CSW) is enhanced as a de-icer by generating biodegradable organic acid salts from reducing sugars and alkali metal hydroxides. This method avoids chlorides, increasing ionic strength for effective freezing point depression.

Area of Science:

  • Green Chemistry
  • Materials Science
  • Chemical Engineering

Background:

  • Corn steep water (CSW) and fermentation byproducts are used in de-icing materials.
  • Current de-icers often require high ionic concentrations for freezing point depression.
  • CSW alone is not an efficient de-icer.

Purpose of the Study:

  • To develop an effective, chloride-free de-icing solution using CSW.
  • To enhance the de-icing properties of CSW by increasing its ionic strength.
  • To utilize biodegradable organic acid salts generated in situ.

Main Methods:

  • Alkaline degradation of reducing sugars (e.g., glucose) added to CSW.
  • In situ generation of hydroxy carboxylic acids and their subsequent salt formation with alkali metal hydroxides.

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  • Controlled addition of sugars and alkali metal hydroxides to achieve desired ionic strength and near-neutral pH.

    • Main Results:

    • The process generates biodegradable organic acid salts, increasing solution ionic strength.
    • Each sugar molecule yields approximately two acid molecules, enhancing freezing point depression.
    • Monovalent metal hydroxides proved more efficient than divalent ones for de-icer solution preparation.
    • CSW's anti-corrosive properties are maintained or utilized in the final de-icer formulation.

    Conclusions:

    • Biodegradable organic acid salts derived from reducing sugars offer an effective, chloride-free method to enhance CSW as a de-icer.
    • The in situ salt generation method successfully increases ionic strength for significant freezing point depression.
    • This approach provides a sustainable alternative to traditional de-icing agents, leveraging byproduct streams.