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Poisoning Deactivations of Automotive Catalysts by Lead and Phosphorus
Technical Paper
852219
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English
Abstract
The deactivation process of automotive catalysts by lead and phosphoruos were studied. The accelerated poisoning test were performed. The activity evaluation and characterisation of poisoned pellet oxidation catalysts showed the following origin of poisoning deactivations. Lead interacts with active materials and phosphorus covers over catalysts to reduce these catalytic performance. In the case of phosphorus and lead co-existence, the activity decreases rapidly because leadphosphate plugges pores of the support. In monolithic catalysts, highly axial distributions of poisons was obserbed. This characteristic distribution is advantageous for the durability of the catalyst.
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Citation
Miyoshi, N., "Poisoning Deactivations of Automotive Catalysts by Lead and Phosphorus," SAE Technical Paper 852219, 1985.Also In
References
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