Deactivation of Cu/SAPO-34 during low-temperature NH3-SCR
Journal article, 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

Author

Kirsten Leistner

Chalmers, Chemistry and Chemical Engineering, Chemical Technology, Chemical Reaction Engineering

Louise Olsson

Chalmers, Chemistry and Chemical Engineering, Chemical Technology, Chemical Reaction Engineering

Competence Centre for Catalysis (KCK)

Applied Catalysis B: Environmental

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

Vol. 165 192-199

Areas of Advance

Transport

Subject Categories

Physical Chemistry

Chemical Engineering

DOI

10.1016/j.apcatb.2014.09.067

More information

Created

10/7/2017