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Reaction-driven Ion Exchange of Copper into Zeolite SSZ-13

Clemens, A. K. S.; Shishkin, A.; Carlsson, P. -A.; Skoglundh, M.; Martinez, Francisco LU ; Matej, Zdenek LU ; Balmes, Olivier LU and Harelind, H. (2015) In ACS Catalysis 5(10). p.6209-6218
Abstract
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... (More)
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. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
NH3-SCR, Cu-SSZ-13, diesel exhaust aftertreatment, solid-state, ion-exchange, NOx reduction
in
ACS Catalysis
volume
5
issue
10
pages
6209 - 6218
publisher
The American Chemical Society
external identifiers
  • wos:000362391500057
  • scopus:84942940113
ISSN
2155-5435
DOI
10.1021/acscatal.5b01200
language
English
LU publication?
yes
id
622da607-ded2-4f77-a218-a0de6d1c5d10 (old id 8221265)
date added to LUP
2015-11-30 13:37:22
date last changed
2017-11-05 04:07:04
@article{622da607-ded2-4f77-a218-a0de6d1c5d10,
  abstract     = {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.},
  author       = {Clemens, A. K. S. and Shishkin, A. and Carlsson, P. -A. and Skoglundh, M. and Martinez, Francisco and Matej, Zdenek and Balmes, Olivier and Harelind, H.},
  issn         = {2155-5435},
  keyword      = {NH3-SCR,Cu-SSZ-13,diesel exhaust aftertreatment,solid-state,ion-exchange,NOx reduction},
  language     = {eng},
  number       = {10},
  pages        = {6209--6218},
  publisher    = {The American Chemical Society},
  series       = {ACS Catalysis},
  title        = {Reaction-driven Ion Exchange of Copper into Zeolite SSZ-13},
  url          = {http://dx.doi.org/10.1021/acscatal.5b01200},
  volume       = {5},
  year         = {2015},
}