Word: ashli
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...student was trying out various chemicals to see if there was some agent that would allow drills to penetrate coal more easily. When he applied ammonia, explained Keller, the raw coal broke down into fine particles, separating the purer hydrocarbons from rock and pyritic sulfur and significantly reducing its ash content...
There was real promise here, Keller said. Ash and sulfur are the principal pollutants in coal. Without them, the remaining fuel would burn clean, unlike the dirty coal used by many big utility plants in the U.S. If the process Keller was describing could be duplicated on a mass scale, it would provide an attractive alternative...
...formation of acid rain. More than half the nation's electricity is produced by power plants that burn coal. By running finely ground coal through a chemical bath (currently pentane, a hydrocarbon similar to butane), the Otisca process separates out all but 1% of the mineral content, or ash, and 0.5% of the sulfur that forms sulfur oxides when it burns. Because it is half water, Otisca Fuel produces a cooler flame than straight coal does and hence about half the nitrogen oxides...
...states, and by itself produces 3% of the nation's electricity, budgeted $6 million for the project. "We went from a bare field to a fully operational plant within 20 months," recalls Smith proudly. The product of the venture was a powdered coal fuel that was 90% free of ash, a new record for such coal...
...black andwhite poster of Elvis Costello, a piece of artdone by me brother, a photograph of my dog--areremnants of that first year, and so are many of myfriends. I hope to get up to Maine to see Jennythis summer, and maybe down to New York where Amylives. Ash and I are both in Cambridge, as is PatHoy. I discuss my writing with Pat all the timeand he has convinced me that I could give writinga go as a career...