Deactivation of Cu/SAPO-34 during low-temperature NH3-SCR
Artikel i vetenskaplig tidskrift, 2015

The sensitivity of NH3-SCR activity to water vapour at 70 degrees C is tested for Cu/SAPO-34 (morph.) catalysts. The synthesised Cu/SAPO-34 (morph.) is remarkably susceptible to low-temperature activity loss. After only 3 hat 70 degrees C, the NOx conversion decreases from an initial 87% to 66% at 200 degrees C, after another 9 h to 6%. This deactivation is accompanied by a partial loss of microporous volume, but the SAPO-34 framework remains crystalline. We postulate that a transformation of the active copper sites into an inactive form could be the cause for the deactivation. Regeneration of the catalyst was attempted, but had no impact on activity.

Cu/SAPO-34

Ammonia SCR

Hydrothermal stability

Water

Deactivation

Författare

Kirsten Leistner

Chalmers, Kemi och kemiteknik, Kemiteknik, Kemisk reaktionsteknik

Louise Olsson

Chalmers, Kemi och kemiteknik, Kemiteknik, Kemisk reaktionsteknik

Kompetenscentrum katalys (KCK)

Applied Catalysis B: Environmental

0926-3373 (ISSN) 1873-3883 (eISSN)

Vol. 165 192-199

Styrkeområden

Transport

Ämneskategorier

Fysikalisk kemi

Kemiteknik

DOI

10.1016/j.apcatb.2014.09.067