Volatile organic compounds

PuraMem® VOC Membranes for efficient recovery of volatile organic compounds (VOC) or natural gas liquids (NGL)

With PuraMem® VOC, Evonik offers an innovative polymer-based membrane technology for efficient recovery of long-chain hydrocarbons from a natural gas or nitrogen mixture.


The spiral-wound membrane module has been optimized for specialty applications such as natural gas treatment, emission control in tank farms, and in the chemical and process industries. It is distinguished by consistently high selectivity over a long period under demanding operating conditions.

The design of PuraMem® VOC has been specially conceived to allow the new membrane from Evonik to be incorporated flexibly into the existing infrastructure of the system. The standard dimension of an 8” diameter and the flexible gasket or integrated Kwik-Flange adapter make it possible to easily plug-in as well as drop in replacement of PuraMem® VOC modules into existing system installations.

How does VOC recovery with Evonik's PuraMem® membrane work?

Applications of PuraMem® VOC membranes for efficient recovery of volatile organic compounds or natural gas liquids

- Natural gas treatment
- Emission control in tank farms
- Chemical and process industries

Technical parameters

PuraMem® VOC

8” Cartridge

Module materials

Stainless Steel (1.4404/316L & 1.4571) and HNBR sealing

Trans membrane pressure

25 bar / 360 psi
80 bar / 1160 psi


0 - 50 °C / 32 - 122 °F


Evonik is the world’s only fully backward-integrated producer of high-selectivity separation membranes. Thanks to the group's many years of expertise in polymer chemistry, Evonik is able to adjust the membrane properties already at the development stage of the base material—the high-performance polymer—to produce especially selective and robust membranes that can withstand extreme pressures and temperatures.