Membrane solution replacing molecular sieves by dehydrating distillates to the final product.


Molecular Sieve Dehydration is a Pressure Swing Adsorption (PSA) technology commonly used in ethanol production.

  • Operation is cyclical with a variety of recycle streams, creating bottlenecks in Distillation, Dehydration & Evaporation (DD&E)
  • The conventional MSU dehydration method is energy intensive as 184 – 190 Proof is required as the MSU feed


Whitefox ICE® XL is a proprietary integrated solution which fully replaces the existing molecular sieves, establishes continuous dehydration and reduces the energy consumption per gallon of ethanol produced.

It does this through:

  • Reconfiguration of existing distillation
  • Installation of a 100% energy neutral ICE XL system
  • Reducing energy consumption by up to 50% which is close to 7 carbon intensity (CI) points

  • Elimination of 190P condensation and revaporization steps
  • Steam reduction in evaporation due to 25% lower water load
  • Better use of capital employed by avoiding cost associated with broken or cracked MSU

The Benefits

  • Reduce steam consumption of DD&E to 8,000 BTU/gal
  • Stable, continuous operation (no pressure swings)

  • Cooling water reduction
  • Elimination of molecular sieve dust contamination
  • Diversify to lower moisture for export
  • Cooling water reduction dust contamination
  • Reduce natural gas consumption by up to 8,000 BTU/gallon 

  • Emission saving – Carbon Intensity (CI) point reduction up to 7 points
  • Reduction in operational and maintenance cost

Whitefox membrane technology provides the following benefits

Capacity increase up to 25%

Diversify to lower moisture for export

Energy saving up to 50%

Cooling Water reduction up to 15%

Reduction in operational and maintenance cost

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