Tag Archives: Mary Carroll

Frozen smoke from Union College (New York state)

I’m always a sucker for a good metaphor or analogy and this February 3, 2014 news item on ScienceDaily nicely fit the bill,

One day, Union College’s [New York state] 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.”

It seems the researchers have developed a new technique for fabricating aerogel which they are wanting to commercialize (from a Feb. 2014 [?] news release originally published as an article in the Union College Magazine’s Fall 2013 issue),

Together with Brad Bruno, Mary Carroll 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.”

Indeed, the surface area of one 0.5-gram bit of aerogel equals 250 square meters.

“That’s a lot of surface area for gases to come in contact with, facilitating very efficient pollution mitigation,” Anderson said.

I have mentioned aerogel before in several postings including this Aug. 20, 2012 posting titled: Solid smoke; a new generation of aerogels.