Insight into CO induced degradation mode of Pd/SSZ-13 in NOx adsorption and release: Experiment and modeling
Artikel i vetenskaplig tidskrift, 2022

Passive NOx adsorption (PNA) on Pd zeolites is an important technique to remove NOx during the cold start of the engine. However, the stability of Pd zeolites under high concentrations of CO is still challenging in multiple cold starts of an engine. Herein, we illustrate the CO-induced degradation mechanism of Pd zeolite by combining experiments and kinetic models. Pd/SSZ-13 has been used in multicycle processes containing NOx adsorption at low temperature and temperature programmed desorption, which represents the PNA degradation in multiple cold start periods. A kinetic model was developed to describe the NOx storage and degradation behavior of Pd/SSZ-13. Both experimental and modelling observations suggested that two Pd sintering modes are occurring under high CO concentration (4000 ppm), namely Ostwald ripening and particle migration. Apart from the degradation behavior, this model is also adequate for describing multi-cycle NOx storage and release behavior under low CO concentration.

Kinetic model

Particle migration

Passive NO adsorber (PNA) x

Pd sintering

Ostwald ripening


Dawei Yao

Chalmers, Kemi och kemiteknik, Kemiteknik

Rojin Feizie Ilmasani

Chalmers, Kemi och kemiteknik, Kemiteknik

Johann C. Wurzenberger


Thomas Glatz


Joonsoo Han

Chalmers, Kemi och kemiteknik, Kemiteknik

Hoang Phuoc Ho

Chalmers, Kemi och kemiteknik, Kemiteknik

Derek Creaser

Chalmers, Kemi och kemiteknik, Kemiteknik

Louise Olsson

Chalmers, Kemi och kemiteknik, Kemiteknik

Chemical Engineering Journal

1385-8947 (ISSN)

Vol. 439 135714

Development of efficient and environmental friendly LONG distance powertrain for heavy dUty trucks aNd coaches

Europeiska kommissionen (EU) (EC/H2020/874972), 2020-01-01 -- 2023-06-30.


Fysikalisk kemi

Annan kemiteknik

Annan materialteknik



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