Molecular Sieve Dehydration Units work on the principle of adsorption. Molecular Sieve Dehydration units typically have higher initial capital investments than comparable glycol units but also are able to achieve very low dew points which are required for cryogenic plants. Additionally, Molecular Sieve Units can also handle large flow variations as well as higher inlet gas temperatures.
Process DescriptionTypically Molecular Sieve Units consist of the following equipment:
- Inlet Filter Separators
- Adsorption Towers (Usually a minimum of two are used: one adsorbing and one regenerating)
- Regeneration Gas Heater
- Regeneration Gas Cooler
- Regeneration Gas Cooler and Separator
- Lots of Piping, Switching Valves and instrumentation