Hydrogen Sulfide Removal Applications

Sour gas constituents in natural gas, such as hydrogen sulfide (H2S), create special challenges when removal is required to meet final product specifications. Depending upon the concentration, handling of the H2S often requires special materials of construction and safety procedures. In addition, the technologies typically used to remove H2S from natural gas are both complex and expensive.

Air Liquide Advanced Separations' (ALaS) PEEK-Sep P-Guard technology is ideal for bulk removal of H₂S from natural gas. A simple P-Guard membrane skid with pre-treatment consisiting of only a coalesing filter, can efficiently remove 90-95% of H₂S with a very low stage cut. This means that the low pressure permeate stream, concentrated in H₂S, will be a small percentage of the feed steam, and can be either re-injected or flared. In the case of high H₂S concentrations and high feed flow conditions, this permeate stream can be sent to a sulphur recovery facility.

To date, Air Liquide Advanced Separations' (ALaS) operating reference units process 4% H₂S or less in the feed stream. Air Liquide is constantly creating innovative solutions in our operations systems, including working to provide a membrane solution for high levels of H₂S (20-30%).