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- W2903016570 abstract "Ammonia storage nonuniformity has a significant impact on the emission reduction performance of urea-based selective catalytic reduction (SCR) systems. In this paper, a unique SCR platform with two catalysts in a parallel configuration was created for investigating the impact of ammonia storage nonuniformity on the emission reduction performance in a simulation environment. The established two-cell SCR platform allows users to independently control the ammonia-to-NOx ratio (ANR) for each catalyst using two independent urea solution injectors. Simulation results over US06 cycle demonstrate that, compared to the case without ammonia storage nonuniformity, the tailpipe NOx and ammonia emissions can be increased by 6.73% and 22.0%, respectively, due to the nonuniform ammonia storage in the case of an ANR nonuniformity index (NUI) at 0.2. Furthermore, an innovative model-based method was proposed for estimating the ammonia coverage ratio nonuniformity (i.e., ammonia storage nonuniformity if storage capacity is known) by utilizing a control-oriented SCR model and the tailpipe NOx and ammonia measurements at the confluence point. Simulation results proved the effectiveness of the proposed method in estimating the ammonia coverage ratio nonuniformity." @default.
- W2903016570 created "2018-12-11" @default.
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- W2903016570 date "2019-01-07" @default.
- W2903016570 modified "2023-09-26" @default.
- W2903016570 title "Estimation of Ammonia Storage Nonuniformity for Urea-Based Selective Catalytic Reduction Systems" @default.
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- W2903016570 doi "https://doi.org/10.1115/1.4042143" @default.
- W2903016570 hasPublicationYear "2019" @default.
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