Greenaway, AG;
Lezcano-Gonzalez, I;
Agote-Aran, M;
Gibson, EK;
Odarchenko, Y;
Beale, AM;
(2018)
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.
Topics in Catalysis
, 61
(3-4)
pp. 175-182.
10.1007/s11244-018-0888-3.
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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 (NH 3 ) of nitrogen oxides (NOx) from the exhaust of lean burn engines, typically diesel powered vehicles. The full mechanism occurring during the NH 3 –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 NH 3 –SCR, to show that the origin of stable Cu(I) species under SCR conditions is potentially caused by an interaction between NH 3 and the Cu cations located in eight ring sites of the bulk of the zeolite and is independent of the NH 3 –SCR of NOx occurring at Cu six ring sites within the zeolite.
| Type: | Article |
|---|---|
| Title: | 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 |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1007/s11244-018-0888-3 |
| Publisher version: | http://dx.doi.org/10.1007/s11244-018-0888-3 |
| Language: | English |
| Additional information: | © The Author(s) 2018 Open Access This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. |
| Keywords: | Catalysis, Operando, XANES, Cu–SSZ-13, Zeolite |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Chemistry |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10042451 |
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