Selective Catalytic Reduction

We have been one of the first research groups worldwide to explore the urea-SCR process for NO_x reduction in mobile Diesel engines. We are conducting research and development projects on different aspects of this fascinating technology, ranging from basic research on reaction mechanism and active species up to applications at real Diesel engines and stationary power plants:

- SCR catalyst research and development: V₂O₅/WO₃-TiO₂, iron- and copper-exchanged zeolites, rare earth metal oxides

- SCR chemistry: standard-SCR reaction, fast-SCR reaction, NO₂-SCR reaction

- hydrolysis catalysts for urea and alternative liquid NH₃ precursor compounds

- catalytic and non-catalytic urea decomposition

- V-emissions of V-based catalysts

- NH₃ oxidation, N₂O formation, NH₄NO₃ formation and decomposition, HCN formation, SO₂ oxidation and HC oxidation

- development of NH₃ generators for mobile applications

- alternative liquid NH₃ precursor compounds

HCN production from formaldehyde on V-based catalysts

M. Elsener, R.J.G. Nuguid, O. Kröcher, D. Ferri, HCN production from formaldehyde during the selective catalytic reduction of NO_x with NH₃ over V₂O₅/WO₃-TiO₂, Appl. Catal. B, 281 (2020) 119462

NH3-SCR on Cu-SSZ-13

A.H. Clark, R.J.G. Nuguid, P. Steiger, A. Marberger, A.W. Petrov, D. Ferri, M. Nachtegaal, O. Kröcher, Selective catalytic reduction of NO with NH₃ on Cu-SSZ-13: Deciphering the low and high-temperature rate-limiting steps by transient XAS experiments, ChemCatChem, 12 (2020) 1429

Cu intermediates in SSZ-13 during NH3-SCR by ME-DRIFTS

A. Greenaway, A. Marberger, A. Thetford, I. Lezcano-Gonzalez, M. Agote-Aran, M. Nachtegaal, D. Ferri, O. Kröcher, C.R.A. Catlow, A.M. Beale, Detection of key transient Cu intermediates in SSZ-13 during NH₃-SCR deNOx by modulation excitation IR spectroscopy, Chem. Sci., 11 (2020) 447

ME-Raman of V-based catalysts

R.J.G. Nuguid, D. Ferri, M. Nachtegaal, O. Kröcher, Modulated excitation Raman spectroscopy of V₂O₅/TiO₂: Mechanistic insights into the selective catalytic reduction of NO with NH₃, ACS Catal. 9 (2019) 6814

Thermal activation and aging of V-based catalysts

Marberger, A., Elsener, M., Nuguid, R.J.G., Ferri, D., Kröcher, O., Thermal activation and aging of a V₂O₅/WO₃-TiO₂ catalyst for the selective catalytic reduction of NO with NH₃, Appl. Catal. A, 573 (2019) 64

Mechanistic implications of La-modification of Au/TiO2 for formic acid decomposition

Sridhar, M., Brose, S., Siewert, D., Ferri, D., van Bokhoven, J.A., Kröcher, D., Mechanistic implications of lanthanum-modification on gold-catalyzed formic acid decomposition under SCR-relevant conditions, Appl. Catal. B, 244 (2019) 709

Effect of Si V-based catalysts

Marberger, A., Ferri, D., Rentsch, D., Krumeich, F., Elsener, M., Kröcher, O., Effect of SiO₂ on co-impregnated V₂O₅/WO₃/TiO₂ catalysts for the selective catalytic reduction of NO with NH₃, Catal. Today, 320 (2019) 123

Contact

Dr. Davide Ferri

Group leader

davide.ferri@psi.ch

+41 56 310 27 81

Gisela Herlein Schmutz

Secretariat

gisela.herlein@psi.ch

+41 56 310 26 63