Unknown

Dataset Information

0

Operando Spectroscopic Studies of Cu-SSZ-13 for NH3-SCR deNOx Investigates the Role of NH3 in Observed Cu(II) Reduction at High NO Conversions.

ABSTRACT: The small pore zeolite chabazite (SSZ-13) in the copper exchanged form is a very efficient material for the selective catalytic reduction by ammonia (NH3) of nitrogen oxides (NOx) from the exhaust of lean burn engines, typically diesel powered vehicles. The full mechanism occurring during the NH3-SCR process is currently debated with outstanding questions including the nature and role of the catalytically active sites. Time-resolved operando spectroscopic techniques have been used to provide new level of insights in to the mechanism of NH3-SCR, to show that the origin of stable Cu(I) species under SCR conditions is potentially caused by an interaction between NH3 and the Cu cations located in eight ring sites of the bulk of the zeolite and is independent of the NH3-SCR of NOx occurring at Cu six ring sites within the zeolite.

SUBMITTER: Greenaway AG 

PROVIDER: S-EPMC6413821 | biostudies-literature | 2018

REPOSITORIES: biostudies-literature

Json Xml
altmetric image

Publications

Operando Spectroscopic Studies of Cu-SSZ-13 for NH<sub>3</sub>-SCR deNOx Investigates the Role of NH<sub>3</sub> in Observed Cu(II) Reduction at High NO Conversions.

Greenaway Alex G AG   Lezcano-Gonzalez Ines I   Agote-Aran Miren M   Gibson Emma K EK   Odarchenko Yaroslav Y   Beale Andrew M AM  

Topics in catalysis 20180119 3

The small pore zeolite chabazite (SSZ-13) in the copper exchanged form is a very efficient material for the selective catalytic reduction by ammonia (NH<sub>3</sub>) of nitrogen oxides (NOx) from the exhaust of lean burn engines, typically diesel powered vehicles. The full mechanism occurring during the NH<sub>3</sub>-SCR process is currently debated with outstanding questions including the nature and role of the catalytically active sites. Time-resolved operando spectroscopic techniques have be  ...[more]

Similar Datasets

Unknown Strikingly distinctive NH<sub>3</sub>-SCR behavior over Cu-SSZ-13 in the presence of NO<sub>2</sub>.
| S-EPMC9360435 | biostudies-literature
Unknown Review of the application of Cu-containing SSZ-13 in NH<sub>3</sub>-SCR-DeNO <sub><i>x</i></sub> and NH<sub>3</sub>-SCO.
| S-EPMC9450943 | biostudies-literature
Unknown Detection of key transient Cu intermediates in SSZ-13 during NH<sub>3</sub>-SCR deNO <sub><i>x</i></sub> by modulation excitation IR spectroscopy.
| S-EPMC7067242 | biostudies-literature
Unknown OSDA-Free Seeded Cu-Containing ZSM-5 Applied for NH3-SCR-DeNOx.
| S-EPMC10633853 | biostudies-literature
Unknown Revisiting the nature of Cu sites in the activated Cu-SSZ-13 catalyst for SCR reaction.
| S-EPMC5588737 | biostudies-literature
Unknown Identifying the Factors Governing the Early-Stage Degradation of Cu-Chabazite Zeolite for NH<sub>3</sub>-SCR.
| S-EPMC6648293 | biostudies-literature
Unknown Prediction of Cu Zeolite NH<sub>3</sub>-SCR Activity from Variable Temperature <sup>1</sup>H NMR Spectroscopy.
| S-EPMC10537069 | biostudies-literature
Unknown Mobility and Reactivity of Cu<sup>+</sup> Species in Cu-CHA Catalysts under NH<sub>3</sub>-SCR-NOx Reaction Conditions: Insights from AIMD Simulations.
| S-EPMC8549050 | biostudies-literature
Unknown High NH<sub>3</sub>-SCR reaction rate with low dependence on O<sub>2</sub> partial pressure over Al-rich Cu-*BEA zeolite.
| S-EPMC8695709 | biostudies-literature
Unknown Elucidating the reaction mechanism of SO<sub>2</sub> with Cu-CHA catalysts for NH<sub>3</sub>-SCR by X-ray absorption spectroscopy.
| S-EPMC10599480 | biostudies-literature