Natural Gas Dehydration for LNG
Understand why water must be removed to very low levels before cryogenic liquefaction and how adsorption-based dehydration systems are operated and regenerated.
System context
Pretreatment
Technical topic pages show the knowledge scope behind LNG University learning. Course, assessment and credential availability depends on the applicable program.
Relevant roles
Liquefaction operators · Process engineers · Control-room personnel
Prerequisites
Gas-processing fundamentals
Knowledge level
Intermediate technical coverage with system and operational context.
Learning outcomes
What this topic is intended to help you understand
- Explain why residual water is unacceptable in cryogenic equipment.
- Describe adsorption and regeneration cycles.
- Recognize the importance of sequencing, temperature and breakthrough monitoring.
Technical scope
Equipment, concepts and terminology
- Molecular sieve beds
- Adsorption
- Regeneration gas
- Heating and cooling
- Switching valves
- Water breakthrough
- Bed sequencing
Operating context
How the topic connects to plant operation
- Bed changeover awareness
- Regeneration monitoring
- Temperature-profile interpretation
- Feed-quality verification
Safeguards and controls
Protection and risk-control context
- High-temperature protection
- Valve sequencing
- Feed specification monitoring
- Pressure equalization controls
Technical learning does not replace site procedures, OEM documentation, engineering calculations, permits, supervision or facility-specific authorization.
Engineering documents
Documents commonly connected to this subject
- Dehydration PFD
- Switching sequence
- P&ID
- Analyzer data