Deterioration Analysis of Real-world SCR Catalysts in Diesel Vehicles

Tongliang Zhang; Yu Sun; Xusheng Xiang; Wenqing Ding; Zhen Chen; Caiyue Dong; Yating Li; Yulong Shan; Yunbo Yu; Hong He

doi:10.53941/ijamm.2024.100023

Open Access

Article

Deterioration Analysis of Real-world SCR Catalysts in Diesel Vehicles

Tongliang Zhang^{1, 2, 3}

,

Yu Sun³

,

Xusheng Xiang⁴

,

Wenqing Ding^{2, 3}

,

Zhen Chen⁴

,

Caiyue Dong⁴

,

Yating Li³

,

Yulong Shan^{3, *}

,

Yunbo Yu^{2, 3}

,

Hong He^{1, 2, 3}

Author Information

Submitted: 12 Aug 2024 | Revised: 22 Oct 2024 | Accepted: 24 Oct 2024 | Published: 28 Nov 2024

Abstract

To investigate the real-world poisoning of Cu-SSZ-13 NH₃-SCR (Selective Catalytic Reduction with NH₃) catalysts in diesel vehicles, three used catalysts from vehicles that have traveled different distances were analyzed. The deterioration observed in these catalysts significantly differs from laboratory simulations due to the combined effect of multiple poisoning factors. The degree of catalyst deterioration is positively correlated not only with driving distance but also with the specific types of poisoning encountered. In real-world conditions, hydrothermal aging is not the primary poisoning factor. Instead, the main cause of Cu-SSZ-13 deactivation is the poisoning by chemical elements such as sulfur and iron. Sulfur poisoning reduces catalytic activity, and the regeneration of the catalyst depends on the species formed. This study reveals that the accumulation of chemical poisons is the primary reason for the deterioration of Cu-SSZ-13 catalysts in real-world conditions. Therefore, reducing toxic components in diesel engine exhaust is essential for maintaining catalyst performance.

Keywords

diesel emission | SCR catalysts | Cu-SSZ-13 zeolite | deterioration

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DOI

10.53941/ijamm.2024.100023

Issue

Volume 3, lssue 4

How to Cite

Zhang, T., Sun, Y., Xiang, X., Ding, W., Chen, Z., Dong, C., Li, Y., Shan, Y., Yu, Y., & He, H. (2024). Deterioration Analysis of Real-world SCR Catalysts in Diesel Vehicles. International Journal of Automotive Manufacturing and Materials, 3(4), 5. https://doi.org/10.53941/ijamm.2024.100023

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