Many manufacturing processes currently emit large quantities of gas effluent into the atmosphere or dispose of by techniques such as thermal oxidation or bio-filtration (which both consume auxiliary fuel and produce CO2). These are usually carrier gases that contain dilute concentrations of organic gas (contaminants). This invention is a new device process for separating dilute gas(es) (e.g. organic gases) from gas streams for reuse as a liquid or other useful purposes (e.g. auxiliary fuel or chemical manufacturing). 

The invention provides gas purification methods and systems for the recovery and liquefaction of low boiling point organic and inorganic gases, such as methane, propane, CO.sub.2, NH.sub.3, and chlorofluorocarbons. Many such gases are in the effluent gas of industrial processes and the invention can increase the sustainability and economics of such industrial processes. In a preferred method of the invention, low boiling point gases are adsorbed with a heated activated carbon fiber material maintained at an adsorption temperature during an adsorption cycle. During a low boiling point desorption cycle the activated carbon fiber is heated to a desorption temperature to create a desorption gas stream with concentrated low boiling point gases. The desorption gas stream is actively compressed and/or cooled to condense and liquefy the low boiling point gases, which can then be collected, stored, re-used, sold, etc. Systems of the invention include an active condensation loop that actively cools and/or compresses a desorption gas stream from said vessel to liquefy low boiling point gases.

Applications

• Packaging Material
• Gas purification (O2/N2 Separation, Ethane/Butane/Propane Separation)
• Chemical Manufacturing
• Petrochemical
• Printing & Painting
• Natural Gas

Benefits

• Converts waste gas stream into 1) useful liquid (close to 100% pure) and/or 2) purified gas stream
• Generate auxiliary fuel by recycling purified carrier gas
• Closed loop system (reduces operating cost, energy, and material consumption)
• Reduces CO2 gas production (thousands of metric tons per year)
• Uses gas, not vapor (therefore boiling point is not an issue)

To license the entire Vapor Phase Removal and Recovery System portfolio, click here [2].