Manufacturing Industry
Catalyst helps eliminate NOx from diesel exhaust.(EMERGING TECHNOLOGY)(United States. Department of Energy. Argonne National Laboratory develops Cu-ZSM-5 zeolite catalyst)(Brief article)
Advanced Materials & Processes, July, 2007
A catalyst that could help diesel truck manufacturers eliminate harmful nitrogen-oxide emissions from diesel exhausts has been developed by researchers at Argonne National Laboratory, Argonne, Ill. Cu-ZSM-5 is a zeolite with copper ions attached within its micropore structure. Zeolites are common catalysts, but do not work well at removing NOx from diesel exhaust.
They require temperatures higher than normal diesel exhaust temperatures and don't work well in the presence of water vapor, which is almost always found in engine exhausts. According to Christopher Marshall, "Our new cerium-oxide additive is the breakthrough that makes it work. When it's combined with Cu-ZSM-5, the resulting catalyst works at normal exhaust temperatures and is actually more effective...
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