Model-Based Fault Diagnosis of Selective Catalytic Reduction Systems for Diesel Engines

2014 ◽  
Vol 7 (2) ◽  
pp. 449-453 ◽  
Author(s):  
Rui Chen ◽  
Xinlei Wang
Keyword(s):  
Fault Diagnosis ◽  
Selective Catalytic Reduction ◽  
Diesel Engines ◽  
Catalytic Reduction ◽  
Model Based

Recent advances in the preparation of zeolites for the selective catalytic reduction of NOx in diesel engines

2019 ◽  
Vol 4 (6) ◽  
pp. 975-985 ◽  
Author(s):  
Ling Zhang ◽  
Qinming Wu ◽  
Xiangju Meng ◽  
Ulrich Müller ◽  
Mathias Feyen ◽  
...  
Keyword(s):  
Selective Catalytic Reduction ◽  
Diesel Engines ◽  
Catalytic Reduction ◽  
Pore Sizes ◽  
Recent Advances ◽  
Small Pore ◽  
Reduction Of Nox ◽  
Scr Of Nox

Metal-exchanged zeolites with small pore sizes have attracted much attention in recent years due to their application in the selective catalytic reduction (SCR) of NOx in diesel engines.

Zonal control for selective catalytic reduction system using a model-based multi-objective genetic algorithm

2019 ◽  
pp. 146808741987459
Author(s):  
Guoyang Wang ◽  
Jinzhu Qi ◽  
Shiyu Liu ◽  
Yanfei Li ◽  
Shijin Shuai ◽  
...  
Keyword(s):  
Genetic Algorithm ◽  
Selective Catalytic Reduction ◽  
Catalytic Reduction ◽  
Optimal Solution ◽  
Utilization Efficiency ◽  
Reduction Model ◽  
Coverage Ratio ◽  
Multi Objective ◽  
Model Based ◽  
Multi Objective Genetic Algorithm

It is challenging for aqueous urea injection control to achieve high NO x conversion efficiency while restricting tailpipe ammonia (NH3) slip. Optimizing the selective catalytic reduction systems can reduce diesel engine emissions, potentially improve fuel economy and urea utilization efficiency, and finally reduce aftertreatment costs. In this article, a model-based multi-objective genetic algorithm is adopted to optimize selective catalytic reduction systems related to trade-off between NO x emission and NH3 slip. Selective catalytic reduction model is a one-state selective catalytic reduction model based on continuous stirred tank reactor theory, which significantly reduces the computational burden. The optimal NH3 coverage ratio map was obtained globally based on world harmonized transient cycle. The effect of temperature on optimal NH3 coverage ratio, Zonal control logics extracted from the optimal solution, and the control problems on different zones were analyzed. The zonal control logics were validated on multiple test cycle with different initial NH3 coverage ratios. Results show that the zonal control achieves high NO x conversion while restricting the tailpipe NH3 slip. With this method, NO x emission and NH3 slip of optimal solution can meet the requirements of the Euro VI emission regulation for heavy-duty diesel engines.

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