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Engine dynamometer experiments: Platinum emissions from differently aged three-way catalytic converters

: Artelt, S.; Kock, H.; König, H.-P.; Levsen, K.; Rosner, G.


Atmospheric environment 33 (1999), S.3559-3567
ISSN: 0004-6981
ISSN: 1352-2310
Fraunhofer ITA ( ITEM) ()
platinum emission; emission factor; platinum; catalytic converter; automobile catalyst; particle

Depending on the operating conditions and the age of the converter, mean platinum emissions ranged from 7 to 123 ng m-3 corresponding to emission factors between 9 and 124 ng km-1. There were no statistically significant differences between the four converter brands tested. The data from new (12-90nm km-1) and old catalytic converters (9-26 ng km-1) installed on a medium-powered gasoline engine (1.8 l 66 kW) showed a tendency towards decreasing platinum emission with increasing use. The platinum emissions increased with rising simulated speed and exhaust temperature. The lowest mean emission from new converters (12 ng km-1) was found at a constant speed of 80 km h-1, the highest (90 ng km-1) at 130 km h-1.