I D
× COMMENTARYIN THE NEWSNEWSFRONTSCHEMENTATOR + Show More
Chemical EngineeringChementator briefs
CO2 Separation Conventional DDR-type zeolite membranes are well suited for…
BUSINESS NEWSTECHNICAL & PRACTICALFEATURE REPORTFACTS AT YOUR FINGERTIPSTECHNOLOGY PROFILEENGINEERING PRACTICEEQUIPMENT & SERVICESFOCUSNEW PRODUCTS + Show More

Comment uncategorized

Membrane productivity springs forward with new degradation-control method

By Mary Page Bailey |

The ability to precisely control the molecular structure of polymer membranes could expand their use in challenging separations, such as the purification of xylene isomers. Using highly selective membranes that can be operated at ambient conditions to separate such hydrocarbons has been proposed as an alternative to energy-intensive distillation, but membrane productivity has limited their use in such large-scale hydrocarbon separations. Building on previous work from the Georgia Institute of Technology (Georgia Tech; Atlanta; www.gatech.edu) and Exxon Mobil Corp. (Irving, Tex.; www.exxonmobil.com) focused on separating xylene isomers using hollow-fiber membranes, researchers have recently demonstrated an enormous increase in membrane productivity while still maintaining a high selectivity. In this project, polymer membranes undergo pyrolysis treatment, where they are degraded in a controlled manner to yield the desired final structure. “What we discovered is that you can expose the polymer to different gaseous atmospheres while it is degrading. In our case, we used hydrogen, so while the polymer is degrading, it’s being exposed to low levels of H2. The H2 changes the degradation reaction chemistry, resulting in dramatic increases…
Related Content
Chemical-resistant membranes for electrolysis
Forblue S-Series ion-exchange membranes (photo) are designed for electrolysis and electrodialysis applications that require robust chemical-resistance performance. Because they are…

Chemical Engineering publishes FREE eletters that bring our original content to our readers in an easily accessible email format about once a week.
Subscribe Now
SICK Solutions for Cleaner Industries - Powerful Transitions
Gain a Digital Line of Sight Across the Whole Lifecycle of the Plant with a Digital Twin
Granulating High Viscous Melts in the Food Industry
How to Select a Pump for Industrial Applications
Temperature Instruments Improve Operations

View More