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Monitoring, Feedback and Control of Urea SCR Dosing Systems for NOx Reduction: Utilizing an Embedded Model and Ammonia Sensing

From Delphi
 

 

This paper presents a monitoring, feedback and control system for SCR urea dosing utilizing an embedded model and NH3 sensing after the SCR for loop closing control.

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Branch Environmental Corp. - Selective Catalytic Reduction (SCR) System
Where large volumes must be handled, we can provide a solvent concentration stage using a special media which captures the VOC and then is regenerated. This allows the released VOC gas to be sent to a... (read more)
Branch Environmental Corp. - Selective Catalytic Reduction (SCR) Systems
Selective Catalytic Reduction (SCR) uses ammonia injected at elevated temperatures to react with oxides of nitrogen (NOx) in the air or gas. The NOx and ammonia are converted to harmless nitrogen and... (read more)
Research, Inc. (RI) /Precision Control Systems, Inc. (PCS) - ControlIR® Power Controllers and Systems
The ControlIR® Series of power controllers and systems are designed to provide safe, high-precision voltage control in a variety of applications. The control systems are designed to meet the needs of... (read more)
Eurotherm/Action Instruments - Injection Molding with the MACO® Compact
Injection Molding with the MACO® Compact from Eurotherm. The MACO® Compact is a cost competitive general-purpose programmable logic controller with the advantages of integrated, total machine... (read more)
Topics of Interest
This paper presents a model-based control system for SCR urea dosing employing an embedded real-time SCR chemistry model and a NH3 sensor. The control algorithm consists of a number of control... (Read More)
Selective Catalytic Reduction (SCR) is the dominant solution for meeting future NOx reduction regulations for heavy-duty diesel powertrains. SCR systems benefit from closed-loop control if an... (Read More)
As the on-highway vehicle industry begins looking ahead to the 2010 exhaust emissions standards, many engine and exhaust system manufacturers are looking at urea-injected selective catalytic reduction... (Read More)
The need for improved emissions control in lean exhaust to meet tightening, world-wide NOx emissions standards has led to the development of selective catalytic reduction of NOx with ammonia as a... (Read More)
The primary requirements of exhaust after treatment systems are low back pressure, low system weight, better emission performance and lower cost. Combinations of these properties provide better engine... (Read More)
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