NGL 3200 – West Karoun Area, Gas Sweetening and Sulphur Recovery Units

The NGL 3200 Project in the West Karoun Area is a strategic development for Iran’s energy sector, supporting both natural gas processing and petrochemical production. Managed by the Petroleum Engineering Development Company, a subsidiary of the Iranian Ministry of Petroleum, this large-scale initiative has been awarded to SADAF Company through an EPCF (Engineering, Procurement, Construction, and Financing) contract.

The project’s main goal is to process 500 MMSCFD (million standard cubic feet per day) of sour gas sourced from major oil fields in West Karoun, including Darquain, Yadavaran, Jofeir, Bande Karkhe, South Azadegan, and North Azadegan. This advanced plant is designed to extract valuable C2+ NGL cuts (natural gas liquids), produce lean gas for distribution or further processing, and recover elemental sulfur as a key byproduct. Each product stream supports Iran’s domestic energy supply and international exports, while also contributing to environmental management and operational efficiency.

Engineering and Procurement Contracts

Tehran Raymand Consulting Engineers has been selected for the engineering and procurement of two critical process units within the NGL 3200 plant: the Gas Sweetening Unit (Unit 200) and the Sulfur Recovery Unit (Unit 600).

• Gas Sweetening Unit (Unit 200):
  • Designed and engineered by Tehran Raymand, the Gas Sweetening Unit reduces the content of hydrogen sulfide (H₂S) and carbon dioxide (CO₂) in the sour feed gas. This treatment ensures the gas meets safety, environmental, and process requirements before it enters the NGL recovery unit.
  • The plant configuration includes two identical gas sweetening trains, each operating in separate gas flow sections. This design provides operational flexibility, reliability, and ease of maintenance.
  • Advanced absorption and regeneration processes are used to remove acid gases, ensuring minimal emissions and maximizing resource recovery.
• Sulfur Recovery Unit (Unit 600):
  • Tehran Raymand is also responsible for the Sulfur Recovery Unit, which converts acid gases from the sweetening unit into liquid sulfur. This is achieved through high-efficiency catalytic reaction and condensation stages.
  • The unit includes a dedicated sulfur solidification package, transforming liquid sulfur into a stable, transportable solid form for safe handling, storage, and export.
  • Off-gases generated during the sulfur recovery process are treated in an advanced incinerator package, which is engineered to meet strict environmental regulations and minimize emissions, supporting Iran’s environmental stewardship commitments.

The integration of these units enhances the overall efficiency and sustainability of the NGL 3200 project, providing reliable gas sweetening, sulfur recovery, and emissions control in one of Iran’s key petrochemical hubs.

Related Links

• Tehran Raymand Projects
• Petroleum Engineering Development Company
• SADAF Company
• National Iranian Oil Company (NIOC)