Feed Gas TreatmentIntermediate

Acid Gas Removal in LNG Pretreatment

Study the removal of carbon dioxide and hydrogen sulfide from feed gas to meet LNG process specifications and protect cryogenic equipment.

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 CO2 and H2S are controlled before liquefaction.
Describe the absorber-regenerator concept used in common solvent systems.
Recognize key operating variables affecting solvent performance.

Technical scope

Equipment, concepts and terminology

Absorber
Regenerator
Lean and rich solvent
Reboiler
Reflux system
Filtration
Solvent circulation
Acid-gas disposition

Operating context

How the topic connects to plant operation

Solvent circulation monitoring
Absorber temperature and pressure awareness
Regenerator duty
Product-gas specification monitoring

Safeguards and controls

Protection and risk-control context

H2S exposure controls where applicable
Pressure relief
Solvent containment
Corrosion monitoring

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

AGR PFD
P&ID
Solvent specification
Analyzer data