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Hitz Dehydration System HDS® by Zeolite Membrane Element

Low-energy chemical separation is an indispensable technology for reducing CO2 emissions and boosting economic viability. One of the most promising forms of this technology is the dehydration system using zeolite separation membrane. The HDS® (Hitz Dehydration System) from Hitachi Zosen uses a specially designed high-performance zeolite membrane to extract high-purity dehydrated ethanol from moisture ethanol. The first HDS® was installed at Hokkaido Bioethanol Co., Ltd. in March 2009 and is still operating smoothly today.
Hitachi Zosen has developed a range of zeolite membranes to suit different applications, including several designed to remove moisture content from organic solvents other than ethanol.

Hitz Dehydration System for Hokkaido Bioethanol Co.,Ltd


1. Features of the system

  1. Separates water from ethanol to achieve a purity of over 99%.
  2. At least 20% more energy efficient than conventional distillation and PSA (adsorption) methods.
  3. Can be adapted for recycling applications through organic solvent regeneration.
  4. Rapid transmission through membrane virtually eliminates contamination by impurities.

Mechanizm of separation

2. Features of the Hitachi Zosen dehydration membrane

  1. Combination of all-ceramic (inorganic) materials and seal-less design improves durability and minimizes operating costs.
  2. Unique design achieves nearly five times faster dehydration than conventional systems with lower initial set-up costs.

Element of HDS®
( diameter of 14.14 mm, Length of 1,150 mm)


  1. Suitable for dehydration of non-alcohol chemicals such as:
    • Ethers
    • Ketones
    • Aromatic hydrocarbons
    • Aliphatic hydrocarbons
  2. Zeolite membrane can be used to separate out CO2 as well as water content.
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