Reaction-driven Ion Exchange of Copper into Zeolite SSZ-13
Journal article, 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

Author

Anna Clemens

Chalmers, Applied Physics, Chemical Physics

Alexander Shishkin

Chalmers, Chemistry and Chemical Engineering, Applied Chemistry, Applied Surface Chemistry

Competence Centre for Catalysis (KCK)

Per-Anders Carlsson

Chalmers, Chemistry and Chemical Engineering, Applied Chemistry, Applied Surface Chemistry

Competence Centre for Catalysis (KCK)

Magnus Skoglundh

Chalmers, Chemistry and Chemical Engineering, Applied Chemistry, Applied Surface Chemistry

Competence Centre for Catalysis (KCK)

F. J. Martinez-Casado

Lund University

Z. Matej

Lund University

O. Balmes

Lund University

Hanna Härelind

Competence Centre for Catalysis (KCK)

Chalmers, Chemistry and Chemical Engineering, Applied Chemistry, Applied Surface Chemistry

ACS Catalysis

2155-5435 (eISSN)

Vol. 5 10 6209-6218

Competence Centre for Catalysis

Volvo Cars, 2014-01-01 -- 2017-12-31.

ECAPS AB, 2014-01-01 -- 2017-12-31.

Scania CV AB, 2014-01-01 -- 2017-12-31.

Volvo Group, 2014-01-01 -- 2017-12-31.

Wärtsilä Finland, 2014-01-01 -- 2017-12-31.

Swedish Energy Agency, 2014-01-01 -- 2017-12-31.

Chalmers, 2014-01-01 -- 2017-12-31.

Haldor Topsoe, 2014-01-01 -- 2017-12-31.

Subject Categories

Inorganic Chemistry

Chemical Process Engineering

Materials Chemistry

Driving Forces

Sustainable development

Areas of Advance

Nanoscience and Nanotechnology (2010-2017)

Transport

Energy

Materials Science

DOI

10.1021/acscatal.5b01200

More information

Latest update

10/28/2018