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Acid Gas Removal

Acid Gas Removal

Removing acid gases by absorption process, permeation, or cryogenic separation

Air Liquide Engineering & Construction has designed numerous acid gas removal plants around the world.

Amine Units

Amine-based solvents are an effective method for processing acid gas, from natural gas, associated gases or unconventional gas sources which have varying compositions of hydrogen sulfide and carbon dioxide. Depending on the composition of raw gas, we implement formulated or generic amine based solvents for an optimal selective processing plant.

 

Acid Gas Removal Amine Wash
Acid Gas Removal Amine Wash

 

Membrane Technology

In case of carbon dioxide rich gas, meeting product specifications requests a particularly efficient method of removing carbon dioxide. In collaboration with Air Liquide Advanced Separations/Porogen, Air Liquide Engineering & Construction offers hollow fiber membrane technology for selective permeation of carbon dioxide while minimizing hydrocarbon losses. This technology combines high permeability with high hydrocarbon resistance, making it an attractive option for bulk carbon dioxide removal. In addition, the operation is highly flexible, it requires little maintenance, making it ideal for remote and offshore locations.

Acid Gas Removal

Cryogenic technology

For natural gas with high CO2 content, Cryogenic technology, alone or in combination with the Air Liquide membrane technology, can produce pipeline specification natural gas. High CO2 partial pressure favors the partial CO2 condensation and making its separation from natural gas even easier. The CO2 and heavy hydrocarbons condense in the cold box and are collected at high pressure. This Air Liquide Engineering & Construction proprietary technology also allows Natural Gas Liquids recovery with almost no additional cost.

CO2 Removal Cryocap
CO2 Removal Cryocap

Advantages

  • Individual or combined solutions can be designed to achieve stringent specifications while optimising economics
  • Very low hydrocarbon losses
  • High energy-efficient processes available

Key figures

Capacity: up to 1.5 million Normal cubic meters per hour (Nm3/h)