I D
× COMMENTARYCOVER STORYIN THE NEWSNEWSFRONTSCHEMENTATOR + Show More
Chemical Engineering MagazineChementator Briefs
PDH catalyst Last month, Clariant's Catalyst business (Munich, Germany; www.clariant.com)…
BUSINESS NEWSTECHNICAL & PRACTICALFEATURE REPORTFACTS AT YOUR FINGERTIPSTECHNOLOGY PROFILESOLIDS PROCESSINGENGINEERING PRACTICEEQUIPMENT & SERVICESFOCUS
Focus on Pumps
Self-priming, liquid-ring pumps enable hygienic operation The CFS AS/ASH Series…
NEW PRODUCTS + Show More

Comment Water Treatment

CNT membrane aids distillation of brine

By Chemical Engineering |

Membrane distillation (MD) — a thermal desalination technique used for recovering pure water from concentrated salt solutions — is hampered by high energy consumption, low single-pass recovery rates and by the need to use expensive heat exchangers to handle the high corrosivity of hot brines. A newly developed membrane based on carbon nanotubes (CNTs) layered with polyvinyl alcohol (PVA) can significantly simplify MD system design by eliminating heat exchangers, while also improving the water recovery rates by almost an order of magnitude. The new membrane, developed by a research group at the University of California at Riverside (www.ucr.edu) led by David Jassby, could allow much more effective and efficient MD of brines, such as those from reverse osmosis waste and produced water from hydraulic fracturing operations. The researchers recently published details of the membrane in the journal Nature Nanotechnology. Conventional MD works when hydrophobic membranes allow passage of salt-free water vapor, while preventing the passage of liquid water and salt. But the single-pass water recovery rates for membrane distillation are limited to 10% or lower, the researchers say. Also, MD’s reliance on a constant stream of hot brine…
Related Content
Facts at your Fingertips: Distillation
Computer-generated simulations of distillation processes are often validated experimentally. This reference discusses three concepts that influence comparisons between experimental results…

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
Quadruple Sensor Lifetime with a Retractable Housing
Minimizing Explosion Risk Where Other Solutions Cannot
Minimizing Corrosion with Fast, Robust Gas Analysis
Lower Measurement Point Costs with Automatic pH Sensor Cleaning
Reduce the Risk of Corrosion in Fertilizer Production

View More

Live chat by BoldChat