At this year’s Achema in Frankfurt am Main (Germany), Evonik presented its latest membrane product development Sepuran NG for natural gas processing.
Frankfurt/Germany — This membrane is a robust, hollow-fiber membrane, which is based on a high-performance plastic that can withstand extreme pressure and temperatures. This enables particularly selective separation of the sour gases from the natural gas, high tolerance of the higher hydrocarbons contained in the natural gas, and consistently high performance of the membrane throughout its lifetime. According to the manufacturer, this separation technology features significantly increased recovery of methane, which had a corresponding effect on the profitability of natural gas processing plants.
The modular structure of the membrane has been designed for conventional, membrane-based natural gas processing plants so that, during the membrane exchange, no further adaptations are required to the existing equipment. For this purpose, the supplier is working together with established gas separation companies that support plant operators in process implementation.
The membrane is designed for the challenging process conditions of natural gas processing with complex gas compositions and typical pressure and temperature conditions up to 70 °C. It can be used effectively in natural gas sources with a high concentration of carbon dioxide because, under these conditions, the separating properties of the membrane remain intact.
The Sepuran product family includes membranes for biogas upgrading, nitrogen generation, and helium and hydrogen processing. They are produced at the Evonik site in Schörfling (Austria). The basic material — the high performance plastic — is manufactured in the neighboring site in Lenzing.