[CCoE Notice] [CCOE Notice] MS Thesis Presentation

[Abercrombie, Irene F]

MS Thesis Defense
Modeling and Control of a Hydrocarbon Selective Catalytic Reduction System for Diesel Exhaust
Oliver Rivera
Date: Thursday, August 2, 2012

Location: Mechanical Engineering Conference Room - 202
Time: 1:00 PM

Committee Chair: Matthew Franchek


Diesel vehicles are continually being regulated each year by tighter restrictions on exhaust emissions. Nitrogen Oxides (NOx) form one of the more difficult emissions to control. Urea based selective catalytic reduction (SCR) of NOx emissions is an evolving technology that has seen widespread implementation on over the road vehicles. However, this technology requires on-board reductant to function properly. Hydrocarbon based SCR (HC-SCR) technology eliminates the need for an additional on-board liquid by using diesel fuel as the reductant. A review of aftertreatment systems including HC-SCR is provided in this work. This review is followed by an experimental investigation of a HC-SCR aftertreatment system fitted to a marine diesel engine. A model of the HC-SCR outlet NOx concentration is developed and validated for several operating conditions. A sensitivity analysis of the model parameters is performed, demonstrating the most influential model parameters. A controller is successfully implemented in simulation and in the laboratory environment.


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