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Development of An Independently Controlled Urea SCR System for Deep NOx Reduction in Marine Applications
| Sub-Grantees: | M.J. Bradley & Associates, Inc.
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To meet ambient air quality standards in the Houston-Galveston area requires substantial reduction of the NOx inventory. A major source of NOx at the ports is due to operation of marine engines in tugs and towboats. Proposed is the design, development and demonstration of a stand-alone urea-SCR system that can be used reliably to produce over 50% reduction in NOx from marine diesel engines. A major objective is that the system should not require electronic interfacing with the engine, to simplify engine retrofit, to avoid reliance on engine durability, and to accommodate retrofit of mechanically injected engines that are typical in marine applications. The program objectives are to prepare a robust, durable design that provides for NOx mass measurement and NOx abatement, while insuring that ammonia slip is eliminated, to select the best available technologies for inclusion in the design, and to configure a controller to receive sensor signals, manage the urea injection, and monitor the system for faults. The system will be designed and constructed, and then demonstrated using a diesel engine connected in a test cell. The proposers will also develop a strategy for scaling the system so that it can enjoy a wide variety of marine and off-road applications. The pathway to commercialization differs from one that would be used for on-road applications, because there are relatively few tugs and their designs differ. A detailed urea-SCR design will be prepared so that the system can be installed by an integrator.
The proposing team will be led by M.J. Bradley and Associates (MJB&A), with West Virginia University (WVU) as a subcontractor. MJB&A previously have led emissions reduction efforts for the Staten Island ferries, with WVU as a subcontractor, and WVU has a strong record in reduction and characterization of diesel engine emissions.
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| Page Updated/Reviewed: 03/30/2007 10:36 AM |
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