Reaction-driven Ion Exchange of Copper into Zeolite SSZ-13
Artikel i vetenskaplig tidskrift, 2015
We have used several techniques to characterize Cu-SSZ-13 before and after exposure to reaction conditions relevant for NO reduction by NH3-SCR to address the increase in NH3-SCR activity observed as a function of time on stream. Specifically, we focus on characterizing copper species in samples prepared with solid state ion exchange (SSIE) having varying Cu loadings from 0.7 to 5.2 wt %. X-ray diffraction shows that CuO species that likely remain from the SSIE synthesis on the outside of the zeolite crystallites are significantly reduced by exposure to reaction conditions. High-resolution X-ray diffraction (HR-XRD) further reveals a corresponding increase of Cu2O species. X-ray photoelectron, Auger electron, and ultraviolet -visible spectroscopy show an increase in both Cu(II) and Cu(I) species inside the zeolite pores, with a preserved long-range order of the zeolite structure as revealed by HR-XRD.
solid-state ion-exchange
diesel exhaust aftertreatment
NOx reduction
NH3-SCR
Cu-SSZ-13
Författare
Anna Clemens
Chalmers, Teknisk fysik, Kemisk fysik
Alexander Shishkin
Chalmers, Kemi och kemiteknik, Tillämpad kemi
Kompetenscentrum katalys
Per-Anders Carlsson
Chalmers, Kemi och kemiteknik, Tillämpad kemi
Kompetenscentrum katalys
Magnus Skoglundh
Chalmers, Kemi och kemiteknik, Tillämpad kemi
Kompetenscentrum katalys
F. J. Martinez-Casado
Lunds universitet
Z. Matej
Lunds universitet
O. Balmes
Lunds universitet
Hanna Härelind
Kompetenscentrum katalys
Chalmers, Kemi och kemiteknik, Tillämpad kemi
ACS Catalysis
21555435 (eISSN)
Vol. 5 10 6209-6218Kompetenscentrum katalys KCK
Volvo Cars, 2014-01-01 -- 2017-12-31.
Energimyndigheten (22490-3), 2014-01-01 -- 2017-12-31.
Chalmers, 2014-01-01 -- 2017-12-31.
Wärtsilä Finland, 2014-01-01 -- 2017-12-31.
Haldor Topsoe, 2014-01-01 -- 2017-12-31.
Scania CV AB, 2014-01-01 -- 2017-12-31.
ECAPS AB, 2014-01-01 -- 2017-12-31.
Volvo Group, 2014-01-01 -- 2017-12-31.
Ämneskategorier
Oorganisk kemi
Kemiska processer
Materialkemi
Drivkrafter
Hållbar utveckling
Styrkeområden
Nanovetenskap och nanoteknik
Transport
Energi
Materialvetenskap
DOI
10.1021/acscatal.5b01200