Selective Catalytic Reduction of NOx with NH3 by Using Novel Catalysts: State of the Art and Future Prospects

L Han, S Cai, M Gao, J Hasegawa, P Wang… - Chemical …, 2019 - ACS Publications
Selective catalytic reduction with NH3 (NH3–SCR) is the most efficient technology to reduce
the emission of nitrogen oxides (NO x) from coal-fired industries, diesel engines, etc …

Cu-CHA–a model system for applied selective redox catalysis

E Borfecchia, P Beato, S Svelle, U Olsbye… - Chemical Society …, 2018 - pubs.rsc.org
We review the structural chemistry and reactivity of copper-exchanged molecular sieves with
chabazite (CHA) topology, as an industrially applied catalyst in ammonia mediated …

Influence of framework Al density in chabazite zeolites on copper ion mobility and reactivity during NOx selective catalytic reduction with NH3

SH Krishna, A Goswami, Y Wang, CB Jones… - Nature Catalysis, 2023 - nature.com
Cu zeolites catalyse low-temperature (< 523 K) selective catalytic reduction (SCR) of
nitrogen oxides (NO x) via a redox cycle involving dynamic interconversion between NH3 …

Catalysis in a cage: condition-dependent speciation and dynamics of exchanged Cu cations in SSZ-13 zeolites

C Paolucci, AA Parekh, I Khurana… - Journal of the …, 2016 - ACS Publications
The relationships among the macroscopic compositional parameters of a Cu-exchanged
SSZ-13 zeolite catalyst, the types and numbers of Cu active sites, and activity for the …

A consistent reaction scheme for the selective catalytic reduction of nitrogen oxides with ammonia

TVW Janssens, H Falsig, LF Lundegaard… - ACS …, 2015 - ACS Publications
For the first time, the standard and fast selective catalytic reduction (SCR) of NO by NH3 are
described in a complete catalytic cycle that is able to produce the correct stoichiometry while …

Isolation of the copper redox steps in the standard selective catalytic reduction on Cu‐SSZ‐13

C Paolucci, AA Verma, SA Bates… - Angewandte Chemie …, 2014 - Wiley Online Library
Operando X‐ray absorption experiments and density functional theory (DFT) calculations
are reported that elucidate the role of copper redox chemistry in the selective catalytic …

Time-resolved copper speciation during selective catalytic reduction of NO on Cu-SSZ-13

A Marberger, AW Petrov, P Steiger, M Elsener… - Nature Catalysis, 2018 - nature.com
Practical catalysts often operate under dynamic conditions of temperature variations and
sudden changes of feed composition that call for understanding of operation and catalyst …

[PDF][PDF] Quick-EXAFS setup at the SuperXAS beamline for in situ X-ray absorption spectroscopy with 10 ms time resolution

O Müller, M Nachtegaal, J Just… - Journal of …, 2016 - journals.iucr.org
The quick-EXAFS (QEXAFS) method adds time resolution to X-ray absorption spectroscopy
(XAS) and allows dynamic structural changes to be followed. A completely new QEXAFS …

Chemical gradients in automotive Cu-SSZ-13 catalysts for NOx removal revealed by operando X-ray spectrotomography

J Becher, DF Sanchez, DE Doronkin, D Zengel… - Nature Catalysis, 2021 - nature.com
Nitrogen oxide (NO x) emissions are a major source of pollution, demanding ever-improving
performance from catalytic after-treatment systems. However, catalyst development is often …

Coordination environment of copper sites in Cu-CHA zeolite investigated by electron paramagnetic resonance

A Godiksen, FN Stappen… - The Journal of …, 2014 - ACS Publications
Cu-CHA combines high activity for the selective catalytic reduction (SCR) reaction with
better hydrothermal stability and selectivity compared to other copper-substituted zeolites. At …