Deciphering SO2 poisoning mechanisms for passive NOx adsorption: A kinetic modeling approach and development of a high-resistance catalyst
Artikel i vetenskaplig tidskrift, 2024

Passive NOx adsorption (PNA) is a promising technology aimed at reducing NOx emissions from vehicles during the cold start phase of the engine. This work investigated the SO2 poisoning mechanism of PNA through a combination of experimental research and kinetic modeling, leading to the development of a novel PNA sample with high resistance to SO2 poisoning. Pd/SSZ-13 samples were synthesized using different drying conditions, revealing that samples dried at room temperature showed lower degradation (10 %) compared to those dried at 80 °C (26 %). Investigation into the degradation revealed that ion-exchanged Pd sites with a hydroxyl group were more resistant to SO2 poisoning than other Pd sites. It is also found that SO2 aids in NOx storage on Pd sites, enhancing the PNA performance. A kinetic model was developed to describe the SO2 poisoning behavior and its influence on NOx storage. The model, which was verified under various conditions, effectively simulated the PNA behavior and SO2 poisoning of Pd/SSZ-13.

Pd/SSZ-13

Kinetic modelling

Synthesis method

Passive NOx adsorption (PNA)

Sulfur poisoning

Författare

Dawei Yao

Chalmers, Kemi och kemiteknik, Kemiteknik

Hoang Phuoc Ho

Chalmers, Kemi och kemiteknik, Kemiteknik

Johann C. Wurzenberger

AVL

Thomas Glatz

AVL

Wei Di

Chalmers, Kemi och kemiteknik, Kemiteknik

Rojin Feizie Ilmasani

Chalmers, Kemi och kemiteknik, Kemiteknik

Derek Claude Creaser

Chalmers, Kemi och kemiteknik, Kemiteknik

Louise Olsson

Chalmers, Kemi och kemiteknik, Kemiteknik

Chemical Engineering Journal

13858947 (ISSN)

Vol. 487 150406

Ämneskategorier

Kemiska processer

Annan kemiteknik

Annan materialteknik

DOI

10.1016/j.cej.2024.150406

Mer information

Senast uppdaterat

2024-04-03