Cu SSZ-13 zeolite catalyst on metallic foam support for SCR of NOx with ammonia: Catalyst layering and characterisation of active sites / J. Kryca, P. J. Jodłowski, M. Iwaniszyn, B. Gil, M. Sitarz, A. ... więcej

Cu SSZ-13 zeolite catalyst on metallic foam support for SCR of NOx with ammonia: Catalyst layering and characterisation of active sites / J. Kryca, P. J. Jodłowski, M. Iwaniszyn, B. Gil, M. Sitarz, A. Kołodziej, T. Łojewska, J. Łojewska // Catalysis Today [Dokument elektroniczny]. – 2016, Vol. 268, [nr spec.], s. 142-149 : fot., tab., wykr. – Tryb dostępu: http://www.sciencedirect.com/science/article/pii/S0920586115007865. – Bibliogr. 43 poz., Abstr. – Mat. konf.: 12th International Conference on Catalysis in Membrane Reactors (ICCMR12), Szczecin, Poland, 22-25.06.2015. – doi: 10.1016/j.cattod.2015.12.018. – ISSN 0920-5861

A particular aim of this work was to develop a method of catalyst layering on the surface of metallic catalyst carriers used in structured reactors. The CuSSZ-13 catalyst was chosen as a prospective catalyst ... więcej

A particular aim of this work was to develop a method of catalyst layering on the surface of metallic catalyst carriers used in structured reactors. The CuSSZ-13 catalyst was chosen as a prospective catalyst for SCR of NOx converter for exhaust from biogas engines. For the first time in the literature the method of in situ synthesis CuSSZ-13 catalyst was elaborated and tested for precalcined Kanthal foam. The CuSSZ-13 catalyst prepared in such a way demonstrated very high activity in NH3-SCR of NO with ammonia and high hydrothermal stability in comparison with analogically prepared CuZSM-5 used as a reference catalyst. The active centres working during SCR at various temperatures were investigated by in situ FTIR experiments with NH3 and CO probe molecules. The structure-activity relationships found for catalyst working at high temperature show that the Lewis acidic Cu+ sites are available exclusively for NO and Brønsted acidic sites for NH3 sorption above 400 °C. Furthermore, high hydrothermal stability of the CuSSZ-13 catalyst is correlated to the favourable location of Al atoms in the zeolite lattice which prevents dealumination and also to the resulted from this stabilization of copper Cu+ active sites.