Aerogels could improve some of our favorite machines, such as cars
One day, Union College’s Aerogel Team’s novel way of making “frozen smoke” could improve some of our favorite machines, including cars.
“When you hold aerogel it feels like nothing – like frozen smoke. It’s about 95 to 97 percent air,” said Ann Anderson, professor of mechanical engineering. “Nano-porous, solid and very low density, aerogel is made by removing solvents from a wet-gel. It’s used for many purposes, like thermal insulation (on the Mars Rover), in windows or in extreme-weather clothing and sensors.”
Together with Brad Bruno, associate professor of mechanical engineering, Mary Carroll, professor of chemistry and others, Anderson is studying the feasibility of commercializing their aerogel fabrication process. A time and money-saver, it could appeal to industries already using aerogel made in other ways.
During rapid supercritical extraction (RSCE), chemicals gel together (like Jell-O) in a hot press; the resulting wet-gel is dried by removing solvents (the wet part). The remaining aerogel (dried gel), is created in hours, rather than the days or weeks alternative methods take.
RSCE, Anderson said, is also approximately seven times cheaper, requiring one hour of labor for every 8 hours the other methods need.
A good place for such a process, and Union aerogel, is the automotive industry.
“Our 3-way catalytic aerogels promote chemical reactions that convert the three major pollutants in automotive exhaust – unburned hydrocarbons, nitrogen oxides and carbon monoxide – into less harmful water, nitrogen and carbon dioxide,” Anderson said. “Because aerogels have very high surface areas and good thermal properties, we think they could replace precious metals, like platinum, used in current catalytic converters.”
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