Structural stability of metal containing ferrierite under the conditions of HT-N2O decomposition

0511989 - ÚFCH JH 2020 RIV NL eng J - Journal Article
Tabor, Edyta - Mlekodaj, Kinga - Sádovská, Galina - Bernauer, Milan - Klein, Petr - Sazama, Petr - Dědeček, Jiří - Sobalík, Zdeněk
Structural stability of metal containing ferrierite under the conditions of HT-N2O decomposition.
Microporous and Mesoporous Materials. Roč. 281, JUN 2019 (2019), s. 15-22. ISSN 1387-1811. E-ISSN 1873-3093
R&D Projects: GA ČR(CZ) GA14-10251S; GA MŠMT(CZ) LM2015073; GA MŠMT(CZ) EF16_013/0001821
Institutional support: RVO:61388955
Keywords : n2o decomposition * fe-fer * catalytic-properties * active-sites * al atoms * zeolites * nmr * framework * fe-zsm-5 * state * Zeolite * Ferrierite
OECD category: Physical chemistry
Impact factor: 4.551, year: 2019
Method of publishing: Limited access

Ferrierite based catalyst is expected to be used for high-temperature decomposition of N2O. The stability of the ferrierite structure and divalent cations in ferrierite in this process were analysed using XRD, SEM, FTIR, Al-27 and Si-29 MAS NMR. This study provides detailed information regarding to Al removal from zeolite that is either involved in the Bronsted acid sites or formation of local cationic sites responsible for bonding divalent cations. The Al atoms, which stabilize divalent cations in cationic positions, have the potential to be resistant to prolonged exposure to the conditions of high-temperature decomposition of N2O. The presence of water led to the destruction of the iron active sites for N2O decomposition in iron ferrierite. Moreover, the negative role of residual sodium ions eventually remaining in the commercial ferrierite was proven to induce the irreversible collapse of the zeolite framework.
Permanent Link: http://hdl.handle.net/11104/0302219