OSDA-Free Seeded Cu-Containing ZSM-5 Applied for NH3-SCR-DeNOx

Magdalena Jabłońska; Ana Palčić; Muhammad Fernadi Lukman; Anna Wach; Marko Bertmer; David Poppitz; Reinhard Denecke; Xiaochao Wu; Ulrich Simon; Andreas Pöppl; Roger Gläser

doi:10.1021/acsomega.3c03721

OSDA-Free Seeded Cu-Containing ZSM-5 Applied for NH₃-SCR-DeNO_x

ACS Omega. 2023 Oct 24;8(44):41107-41119. doi: 10.1021/acsomega.3c03721. eCollection 2023 Nov 7.

Authors

Affiliations

¹ Institute of Chemical Technology, Universität Leipzig, Linnéstr. 3, 04103 Leipzig, Germany.
² Laboratory for the Synthesis of New Materials, Division of Materials Chemistry, Rud̵er Bošković Institute, Bijenička 54, 10000 Zagreb, Croatia.
³ Felix Bloch Institute for Solid State Physics, Universität Leipzig, Linnéstr. 5, 04103 Leipzig, Germany.
⁴ PSI, Forschungsstrasse 111, 5232 Villigen, Switzerland.
⁵ Wilhelm-Ostwald-Institute for Physical and Theoretical Chemistry, Universität Leipzig, Linnéstr. 2, D-04103 Leipzig, Germany.
⁶ Institute of Inorganic Chemistry, RWTH Aachen University, Landoltweg 1a, 52074 Aachen, Germany.

Abstract

A series of ZSM-5 zeolite materials were synthesized from organic structure-directing agent (OSDA)-free seeded systems, including nanosized silicalite-1 (12 wt % water suspension or in powder form) or nanosized ZSM-5 (powder form of ZSM-5 prepared at 100 or 170 °C). The physicochemical characterization revealed aggregated species in the samples based on silicalite-1. Contrarily, the catalysts based on ZSM-5 seeds revealed isolated copper species, and thus, higher NO conversion during the selective catalytic reduction of NO_x with NH₃ (NH₃-SCR-DeNO_x) was observed. Furthermore, a comparison of the Cu-containing ZSM-5 catalysts, conventionally prepared in the presence of OSDAs and prepared with an environmentally more benign approach (without OSDAs), revealed their comparable activity in NH₃-SCR-DeNO_x.