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SCR or EGR?

Published Tuesday, July 01, 2008

There's a lot to like and a lot to dislike about both EGR and SCR technologies,” says Dr. Stephen Ciatti, principal mechanical engineer for Argonne National Laboratory (www.anl.gov), “but they are proven approaches to emissions reduction, and most manufacturers in the U.S. have already done most of the work to implement one solution or the other to meet 2010 requirements.” According to Ciatti, there are two basic ways to reduce oxides of nitrogen (NOx) in diesel exhaust: “either do something to get rid of as much NOx as you can after it is produced by the ...

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