Extruded HC Traps: Experiments and Simulations

Manish  Sharma, Ford Motor Company

ORAL PRESENTATION: Extruded Catalyzed Hydrocarbon Traps are being developed for improving the performance of the automotive after-treatment systems during the cold start of a vehicle engine. The majority of unburned hydrocarbon (HCs) emissions from vehicles occur during cold start operation of the vehicle before the catalyst system has heated to the point where it has reached high operating efficiency. This talk will present the results of a laboratory and modeling study of the performance of extruded HC traps. A brief introduction of the mathematical model will be followed by simulation results showing the effects of parameters like the cell density and zeolite content. The mathematical model helps understand the effect of zeolite capacity, diffusion and thermal mass on the performance of extruded traps. Lab experiments conducted on zeolites to study the competitive adsorption of various HCs and water will also be presented.

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