Understanding NOx SCR and soot oxidation processes on multi-functional SCR-based materials
EMSL Project ID
49537
Abstract
The objective of this project is to develop a strategy for the integration of catalytic NOX emission control and particulate matter emission control into a single device for the successful application to heavy-duty on-road diesel engine exhaust aftertreatment.This project will develop a strategy for the integration of SCR and DPF technologies into a single device (herein referred to as SCRF) for the successful application to heavy-duty on-road diesel engine exhaust aftertreatment. The key technical accomplishments to be pursued in this work are as follows:
1. Integration of a DPF with a binary catalyst system consisting of an SCR phase and a selective catalytic oxidation (SCO) phase to enable sufficient passive soot oxidation capacity within the device.
2. The SCR-SCO binary catalyst system will be successful in enabling the availability of NO2 for achieving the necessary passive soot oxidation capacity within the integrated device while retaining high NOX reduction efficiency and minimizing the parasitic oxidation of NH3 (with O2).
3. Fundamental understanding of the interaction of the SCR and SCO catalyst phases will be achieved to lead to an optimized binary catalyst system, identifying the necessary engineering requirements and system limitations for their integration, with a view to proper function and optimal integration.
4. Develop the necessary understanding of aging and poisoning behavior of the binary catalyst system as it compares to current state-of-the-art SCR catalysts for determining the impacts of the SCO phase and mitigating of those that adversely impact aging behavior of the system.
Project Details
Start Date
2016-08-25
End Date
2016-09-30
Status
Closed
Released Data Link
Team
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