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Interzeolite Conversion of FAU Type Zeolite into CHA and its Application in NH3-SCR

Radka Nedyalkova (Kompetenscentrum katalys (KCK) ; Institutionen för kemi- och bioteknik, Kemisk reaktionsteknik) ; C. Montreuil ; C. Lambert ; Louise Olsson (Institutionen för kemi- och bioteknik, Kemisk reaktionsteknik ; Kompetenscentrum katalys (KCK))
Topics in catalysis (1022-5528). Vol. 56 (2013), 9-10, p. 550-557.
[Artikel, refereegranskad vetenskaplig]

In this work we studied the potential feasibility to synthesize small pore zeolites, such as chabazite (CHA) via interzeolite conversion of FAU type zeolite. We have thereafter used CHA as the starting material to obtain Cu-CHA. When CHA in NH4 (+) form was used to prepare Cu-CHA, the large size of the potassium cation present in the structure caused pore blockage in the chabazite framework, and diminished the adsorption and exchange capacity. However, Cu-CHA with comparable Selective Catalytic Reduction performance to the commercial catalyst was obtained via ion exchange if Cu-exchange was performed from H+-CHA form. Still, the main challenge was to fully eliminate K+ from the zeolite structure in order to further improve its catalytic performance and high temperature stability.

Nyckelord: NH3-SCR, NH3 oxidation, Cu-CHA, Zeolite synthesis, selective catalytic-reduction, nitric-oxide, potassium chabazite, hydrothermal stability, ammonia, nox, scr, decomposition, encapsulation, performance

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Denna post skapades 2013-07-19. Senast ändrad 2017-09-14.
CPL Pubid: 180208


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Institutioner (Chalmers)

Kompetenscentrum katalys (KCK)
Institutionen för kemi- och bioteknik, Kemisk reaktionsteknik (2005-2014)



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