Home > W.S. Winston Ho: New Membranes for CO2 Separation and Water Purification

W.S. Winston Ho: New Membranes for CO2 Separation and Water Purification


10/3/2017 at 12:30PM


10/3/2017 at 1:30PM


138 DeBartolo hall


College of Engineering close button

Ruilan Guo

Ruilan Guo

VIEW FULL PROFILE Email: rguo@nd.edu
Phone: 574-631-3453
Office: 121C Cushing Hall


College of Engineering Assistant Professor
Research in the Guo group combines engineering and chemistry principles for the design, synthesis and characterization of functional polymer and polymer-based membrane materials with applications in the areas impacting both energy and the environment.  Topics of the group’s research span several ...
Click for more information about Ruilan
Add to calendar:
iCal vCal

This presentation covers new advances in membranes for carbon dioxide separation and water purification.  The membranes for carbon dioxide separation include CO2-selective membranes for hydrogen purification for fuel cells and post-combustion carbon capture from flue gas in coal- and/or natural gas-fired power plants.  Highly CO2-selective membranes comprise fixed-site and mobile carriers and involve the facilitated transport mechanism based on reversible CO2 reactions with amine carriers.  The membranes remove H2S even faster than CO2 (~3 times).  In general, the membranes need to be tailor-made and tuned specifically for those applications.  For example, hydrogen purification for fuel cells demands the membrane with a very high CO2/H2 selectivity of 100 along with a modest CO2 permeance of about 100 GPU (1 GPU = 10-6 cm3 (STP)/(cm2 · s · cmHg)).  On the other hand, post-combustion carbon capture requires a high CO2/N2 selectivity of 140 together with a very high CO2 permeance of about 700 GPU or higher in order to use a stand-alone membrane process.  In order to achieve the membrane performance, highlighted are composite membranes comprising a high-selectivity layer on a highly permeable polymeric or inorganic/polymer support; the latter with zeolite nanoparticles can be used as the seed layer for continuous roll-to-roll fabrication of zeolite membranes.  Also highlighted are the effects of amine steric hindrance and SO2 on membrane performance as well as the scale-up of the membranes through continuous roll-to-roll fabrication.  On water purification, novel interfacially polymerized reverse osmosis (RO) membranes have been synthesized with the new concept of incorporating hydrophilic groups chemically into membrane structure to provide an additional pathway for water transport and to overcome the low hydrophilicity/flux issue inherent in interfacially polymerized membranes.  This has resulted in about 100% increase in water flux vs. the industry standard membrane while maintaining a high NaCl rejection of >99% for desalination of seawater and brackish water, in addition to improving fouling resistances.

Seminar Speaker:

W.S. Winston Ho

W.S. Winston Ho

The Ohio State University

Dr. W.S. Winston Ho is a Distinguished Professor of Engineering in the William G. Lowrie Department of Chemical and Biomolecular Engineering and the Department of Materials Science and Engineering at The Ohio State University.  Before teaching for 18 years, he had over 28 years of industrial R&D experience in membranes and separation processes, working for Allied Chemical, Xerox and Exxon, and serving as Senior Vice-President of Technology at Commodore Separation Technologies.  He was elected to the National Academy of Engineering, USA in 2002 in recognition of his distinguished contributions to engineering.  A New Jersey Inventor of the Year (1991), Dr. Ho holds more than 55 U.S. patents, generally with foreign counterparts, in membranes and separation processes.  He received the 2006 Institute Award for Excellence in Industrial Gases Technology from the American Institute of Chemical Engineers (AIChE), and he was the 2007 recipient of Clarence G. Gerhold Award, from the AIChE Separations Division, one of the highest honors bestowed to those working on separations.  He received the 2012 Lawrence B. Evans Award in Chemical Engineering Practice from AIChE.  In 2014, he was elected to Academia Sinica, the highest form of academic recognition in the Republic of China in Taiwan.  He obtained his B.S. degree from National Taiwan University and his M.S. and Ph.D. degrees from the University of Illinois at Urbana-Champaign, all in Chemical Engineering.