Kinetic modeling of Fe-BEA as NH3-SCR catalyst – Effect of Phosphorous
Journal article, 2015

The focus of this work is to investigate whether a previously developed micro-kinetic deactivation model for hydrothermally treated Fe-BEA as NH3-SCR catalyst can be applied to describe chemical deactivation of Fe-BEA due to phosphorous exposure. The model describes the experiments well for Fe-BEA before and after phosphorous exposure by decreasing the site density, representing deactivation of sites due to formation of metaphosphates blocking the active iron sites, while the kinetic parameters are kept constant. Furthermore, the results show that the activity for low-temperature SCR is very sensitive to loss of active monomeric iron species due to phosphorous poisoning compared to high-temperature SCR. Finally, the ammonia inhibition simulations show that exposure to phosphorous may affect the internal transport of ammonia between ammonia storage sites buffering the active iron sites which results in a lower SCR performance during transient conditions.


Micro-kinetic model


Phosphorous exposure




Soran Shwan

Chalmers, Chemistry and Chemical Engineering, Applied Chemistry

Competence Centre for Catalysis (KCK)

Jonas Jansson

Volvo Group

Louise Olsson

Chalmers, Chemistry and Chemical Engineering, Chemical Technology

Competence Centre for Catalysis (KCK)

Magnus Skoglundh

Competence Centre for Catalysis (KCK)

Chalmers, Chemistry and Chemical Engineering, Applied Chemistry

AICHE Journal

0001-1541 (ISSN) 1547-5905 (eISSN)

Vol. 61 1 215-223

Driving Forces

Sustainable development

Areas of Advance

Nanoscience and Nanotechnology (SO 2010-2017, EI 2018-)



Materials Science

Subject Categories

Physical Chemistry

Chemical Process Engineering

Chemical Engineering



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