Functionalization of SSZ-13 and Fe-Beta with copper by NH3 and NO facilitated solid-state ion-exchange
Artikel i vetenskaplig tidskrift, 2017

We show that functionalization of SSZ-13 (CHA) and Fe-beta (*BEA) with copper using a recently reported solid-state ion-exchange method, facilitated by NH3 and nitrogen oxides (NO), is a viable route to prepare Cu-SSZ-13 and (Cu + Fe)-beta catalysts, starting from H-SSZ-13 and Fe-beta, respectively. The physicochemical properties of the prepared catalysts are characterized by XRD, UV-Vis-spectroscopy and STEM-EDS, confirming that copper originally present in the physical mixture of CuO and H-SSZ-13, and CuO and Fe-beta, is inserted into the micropores of SSZ-13 and Fe-beta, respectively. Activity measurements in gas-flow reactor show that the samples are active for NO reduction by NH3-SCR over a broad temperature range, i.e., 150–500 C. For the Cu-SSZ-13 catalysts, which have a copper loading range of 0.5–4 wt. %, the sample prepared from the physical mixture with a CuO/SSZ-13 ratio corresponding to 2 wt.% Cu is the most active catalyst for NH3-SCR under the present reaction conditions. Furthermore, the (Cu + Fe)-beta catalyst shows higher NH3-SCR activity over a broader temperature range and especially at low temperature as compared to the Fe-beta and Cu-beta counterparts. The results encourage further elaboration on sequential ion-exchange procedures for bimetallic functionalization of zeolites.

CHA

NH3-SCR

NOx-reduction

Zeolite

Iron

Solid-state ion-exchange

Copper

BEA

Författare

Alexander Shishkin

Chalmers, Kemi och kemiteknik, Tillämpad kemi, Teknisk ytkemi

Kompetenscentrum katalys (KCK)

Soran Shwan

Chalmers, Kemi och kemiteknik, Tillämpad kemi, Teknisk ytkemi

Kompetenscentrum katalys (KCK)

Torben Nilsson Pingel

Kompetenscentrum katalys (KCK)

Chalmers, Fysik, Eva Olsson Group

Eva Olsson

Kompetenscentrum katalys (KCK)

Chalmers, Fysik, Eva Olsson Group

Anna Clemens

Chalmers, Fysik

Kompetenscentrum katalys (KCK)

Per-Anders Carlsson

Chalmers, Kemi och kemiteknik, Tillämpad kemi, Teknisk ytkemi

Kompetenscentrum katalys (KCK)

Hanna Härelind

Kompetenscentrum katalys (KCK)

Chalmers, Kemi och kemiteknik, Tillämpad kemi, Teknisk ytkemi

Magnus Skoglundh

Chalmers, Kemi och kemiteknik, Tillämpad kemi, Teknisk ytkemi

Kompetenscentrum katalys (KCK)

Catalysts

2073-4344 (ISSN)

Vol. 7 8 1-10 232

Drivkrafter

Hållbar utveckling

Innovation och entreprenörskap

Styrkeområden

Nanovetenskap och nanoteknik

Transport

Energi

Materialvetenskap

Ämneskategorier

Fysikalisk kemi

Kemiska processer

Fundament

Grundläggande vetenskaper

DOI

10.3390/catal7080232