Capture and Recovery of Volatile Organic Compounds Vapors Using Membrane Technology

The problem of separation and recovery of volatile organic compounds (VOC) vapors is important both from the point of view of reducing the negative anthropogenic impact on the environment and from the point of view of resource conservation. The main classes of VOCs are, first of all, aliphatic, aromatic and oxygen-containing hydrocarbons. A significant source of VOC emissions of various natures are waste gas process flows (or off-gases) of petrochemical industries (polymerization processes, hydrotreating, isomerization, dehydrogenation, etc.). The capture and recovery of VOC vapors is implemented mainly using recovery technology and decomposition technology. This review is devoted to a brief overview of modern technologies for the removal and recovery of VOCs from vapor-gas mixtures. The technology of membrane separation of vapor-gas mixtures, including promising membrane materials, is considered in detail. This technology allows for the selective separation of VOCs, and the purified main gas flow can be returned to the production cycle, if necessary, without additional preparation.