Kinetic modeling of Fe-BEA as NH3-SCR catalyst – Effect of Phosphorous
Artikel i vetenskaplig tidskrift, 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.

Deactivation

Micro-kinetic model

Fe-BEA

Phosphorous exposure

NH3-SCR

Poisoning

Författare

Soran Shwan

Chalmers, Kemi och kemiteknik, Tillämpad kemi, Teknisk ytkemi

Kompetenscentrum katalys (KCK)

Jonas Jansson

Volvo Group

Louise Olsson

Chalmers, Kemi och kemiteknik, Kemiteknik, Kemisk reaktionsteknik

Kompetenscentrum katalys (KCK)

Magnus Skoglundh

Kompetenscentrum katalys (KCK)

Chalmers, Kemi och kemiteknik, Tillämpad kemi, Teknisk ytkemi

AICHE Journal

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

Vol. 61 1 215-223

Drivkrafter

Hållbar utveckling

Styrkeområden

Nanovetenskap och nanoteknik (2010-2017)

Transport

Energi

Materialvetenskap

Ämneskategorier

Fysikalisk kemi

Kemiska processer

Kemiteknik

DOI

10.1002/aic.14638

Mer information

Senast uppdaterat

2018-11-23