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Science 15 June 1973:
Vol. 180. no. 4091, pp. 1168 - 1169
DOI: 10.1126/science.180.4091.1168
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Articles

Fine Particles Produced from Automotive Emissions-Control Catalysts

William D. Balgord 1

1 New York State Department of Environmental Conservation, Albany 12201

High concentrations of metal-containing condensation nuclei have been thermally induced from stabilized catalysts containing chromium, copper, and nickel under conditions closely resembling those found in automobile exhaust. Commercial and developmental catalyst formulations have been found to emit fine particles under a broad range of controlled conditions at temperatures ranging from 185° to 800°C, in filtered air, in a mixture of 3 percent carbon monoxide in molecular nitrogen, and in the product stream of a pulsed flame combustor.


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