Carl A. Koval
Professor Emeritus • Institute Fellow Emeritus, RASEI
Chemistry • Renewable and Sustainable Energy Institute (RASEI)

Office: Ekeley Science M335
Lab: Ekeley M330, M324, M322
Lab Phone: 303-492-8957
Fax: 303-492-5894


B.S.: Juniata College, summa cum laude, 1974 
California Institute of Technology, 1979 
Postdoctoral Fellow: Purdue University, 1978-80

Areas of Expertise

Renewable Energy, Membranes, Renewable Energy, Physical Inorganic Chemistry

Awards and Honors

ACS Colorado Section Award, 1996.
Faculty Fellowship, Council on Research and Creative Work, 1995/96
Visiting Associate Professor, California Institute of Technology. 1992
National Research Council Senior Research Associate, Solar Energy Research Institute, 1989

Renewable Energy, Electrochemistry and Membranes

Most of my research is related to understanding and/or developing chemical processes that that either produce usable energy from renewable sources, or utilize energy more efficiently.  Over the past 25 years, my research group has investigated a number of fundamental issues related to electron transfer processes at the semiconductor-solution interface.   Understanding these processes is critical for the development of efficient photoelectrochemical cells.  As part of a longstanding collaboration with Prof. Richard Noble in Chemical and Biological Engineering, my group has investigated selective and energy-efficient membrane separation processes, primary through the use of facilitated transport membranes and, more recently, ionic liquid membranes.  Another collaborative research direction involved the development of electrochemically modulated complexation (EMC), an energy efficient process that allows specific components of a mixture to be separated and concentrated.  Recently, we showed that an EMC processes could be used to selectively remove carbon dioxide from gas mixtures. Recently, my group developed a new electrochemical/membrane process for non-mechanical pumping of fluids against high pressures.  This process has potential applications that range from robotics and morphing structures to microfluidics.

In 2006, I was appointed as Interim Faculty Director of a CU Campus Initiative on Renewable and Sustainable Energy.

The Energy Initiative encompasses the activities of students, faculty, and staff from the entire Campus.  The goal of the Initiative is to address the scientific, political, social and economic challenges of developing and implementing renewable and sustainable energy. 

Christine E. Evans, Richard D, Noble, Carl A. Koval, “A nonmechanical, membrane-based liquid pressurization system,” Ind. Eng. Chem. Res. (2006) 45, 472 -475.

Richard D. Noble and Carl A. Koval, “Review of Facilitated Transport Membranes,” Materials Science of Membranes for Gas and Vapor Separation, John Wiley and Sons, Ltd. (2006) 411-435.

Mya A. Norman, Christine E. Evans, Anthony R. Fuoco, Richard D. Noble, Carl A. Koval, “Characterization of a Membrane-Based, Electrochemically Driven Pumping System Using Aqueous Electrolyte Solutions,” Anal. Chem. (2005) 77, 6374-6380..

Paul Scovazzo, Joe Poshusta, Daniel DuBois, Carl Koval, Richard Noble, "Electrochemical Separation and Concentration of <1% Carbon Dioxide from Nitrogen," J. Electrochem. Soc., (2003) 150, D91-98.

Paul Scovazzo, Ann E. Visser, James H. Davis, Jr., Robin D. Rogers, Carl A. Koval, Dan L. DuBois, and Richard D. Noble, " Supported Ionic Liquid Membranes and Facilitated Ionic Liquid Membranes,” ACS Sym. Ser. (2002) 818, 69-87.

Teresa L. Longin, Michelle L. Goyette, Carl A. Koval, "Liquid Membranes with Light Switches," Chemical Innovation (2001) 31, 23-30