Waynesburg chemistry professor receives patent

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LaCount

The U.S. Patent and Trademark Office has assigned Patent No. 8,440,015 to Robert LaCount, chemistry professor at Waynesburg University, as well as Douglas Kern, 1990 and 2006 Waynesburg University alumnus, and John Baltrus, a research chemist at the National Energy Technology Laboratory (NETL), for a thermal method that retains yet passivates carbon and/or other components in fly ash. The research resulted from a project sponsored by the Combustion Byproducts Recycling Consortium (CBRC), which is funded by NETL.


Waynesburg University President Douglas G. Lee expressed his pride and support of LaCount's commitment to continued education, research and the environment as evidenced by this new patent.


“Dr. LaCount is a fine example of how Waynesburg University faculty and staff live out the University's mission of 1849,” said President Lee. “His long-standing dedication to academic excellence in the field of chemistry serves as an excellent example to our students.”


Fly ash is the finely divided residue resulting from the combustion of ground or powdered coal and is a major by-product of coal-fired electric generating plants. Finding alternate uses for this byproduct benefits the environment by diverting it from landfills. Fly ash is most popularly used as a component of concrete. Approximately 30 percent of U.S fly ash is recycled this way, replacing a portion of the portland cement normally required. In addition to the direct environmental advantage of utilizing a potential waste stream to substitute for an ingredient that would otherwise have to be produced through an energy-intensive process, incorporation of fly ash improves concrete performance and quality.


Some fly ash is not suitable for use in concrete because its chemical composition, including high carbon content, would require excessive amounts of air entrainment agents–surfactants used to increase the workability of a concrete mixture and its durability through freeze-thaw cycles when cured.


The invention titled, “Fly Ash Carbon Passivation,” provides a means whereby a greater percentage of U.S. fly ash can be recycled by incorporation into concrete mixtures. The patent describes a thermal method for inactivating the carbon and/or other components in fly ash while retaining them in the fly ash. The process, which involves heating the fly ash to between 400