VOCs Recovery Membrane

Product Overview

The VOCs Recovery Membrane is a high-efficiency gas separation system using rubbery polymer membrane technology. It effectively separates organic vapors (VOCs) from light gas components.

The compact membrane system is easy to operate and is suitable for chemical, petrochemical, and gas processing industries. Under a pressure differential, the incoming gas is divided into permeate gas and retentate gas, allowing concentrated recovery of organic vapors and purification of light gas components.

Working Principle

The VOCs recovery membrane operates based on selective solubility. Heavier, higher-boiling molecules (such as ethylene, propylene, chloromethane, vinyl chloride, butadiene, and other light hydrocarbons) dissolve easily in the membrane and permeate quickly. Lighter, lower-boiling gases (such as H₂, N₂, CH₄) permeate more slowly.

Under the pressure differential across the membrane, the gas stream separates into:

· Permeate gas: enriched in organic vapors

· Retentate gas: purified light components

Membrane modules are available in spiral-wound and stacked configurations to suit different processing needs.

Key Features

· High Recovery Efficiency: Typically exceeds 90%

· Low Investment, Quick Payback: Approximately 3–12 months

· Flexible Operation: Adjustable range of 50–200%

· Minimal Maintenance: No moving or rotating parts

· Low Energy Consumption: Main power usage is for compression

· Compact Skid-Mounted Design: Small footprint, easy to expand

· Easy Integration: Can couple with other processes for clean, zero-emission operation

Applications

· Recovery of propylene monomer from polypropylene vent gas

· Recovery of propylene derivatives (e.g., acrylonitrile, butanol, propylene oxide)

· Recovery of ethylene, butene, pentane, and hexane from polyethylene vent gas

· Recovery of ethylene derivatives (ethylene oxide, ethylene glycol, PVC)

· Recovery of chloromethane monomers in siloxane quaternary ammonium salt production

· Recovery of light hydrocarbons from catalytic reforming off-gas and refinery gases

· Recovery of tail gas during loading/unloading at stations and bridges

· Gas recovery at gas stations and gasoline storage tanks

· Natural gas dew point reduction and treatment