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%).