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Molecular Sieve Adsorption

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Definition:
A process that uses porous materials to selectively remove water, carbon dioxide, and other contaminants from natural gas.

Key Components:

  • Zeolite-Based Molecular Sieves: Absorb water and impurities at the molecular level.
  • Regeneration Cycle: Uses heat or pressure swings to remove absorbed contaminants.
  • Gas Conditioning Unit: Prepares natural gas for further processing or transport.

Use Cases/Industries:

  • LNG Processing: Prevents ice formation in cryogenic operations.
  • Pipeline Gas Drying: Ensures gas meets transportation moisture limits.
  • Petrochemical Processing: Removes impurities for high-purity hydrocarbon feedstocks.

Advantages:

  • High Purity Output: Removes contaminants down to trace levels.
  • Regenerable Media: Can be reused multiple times before replacement.
  • Stable Performance: Operates effectively across varying gas compositions.

Challenges:

  • High Energy Use: Requires heat or vacuum for regeneration.
  • Media Degradation: Molecular sieves degrade over time and need replacement.
  • Complexity: Requires precise control of temperature and pressure.

Related Terms:
Desiccant Dehydration, Cryogenic Gas Processing, Adsorption Technology

Example:
A molecular sieve system dehydrates natural gas before liquefaction, preventing ice formation in LNG plants.

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Synonyms:
Adsorption Drying, Gas Purification, Desiccant Dehydration
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