Synthesis and characterization of Cu-MFI catalyst for the direct medium temperature range NO decomposition

• Autorzy: Valkaj K. M. , Tomasic V. , Katovic A. , Bielanska E.

Identyfikatory

DOI

10.1515/msp-2016-0018

• Języki publikacji: EN

Abstrakty

EN

In this study the physico-chemical and catalytic properties of copper bearing MFI zeolites (Cu-MFI) with different Si/Al and Si/Cu ratios were investigated. Two different methods for incorporation of metal ions into the zeolite framework were used: the ion exchange from the solution of copper acetate and the direct hydrothermal synthesis. Direct synthesis of a zeolite in the presence of copper-phosphate complexes was expected to generate more active copper species necessary for the desired reaction than the conventional ion exchange method. Direct decomposition of NO was used as a model reaction, because this reaction still offers a very attractive approach to NO_X removal. The catalytic properties of zeolite samples were studied using techniques, such as XRD, SEM, EPR and nitrogen adsorption/desorption measurements at 77 K. Results of the kinetic investigation revealed that both methods are applicable for the preparation of the catalysts with active sites capable of catalyzing the NO decomposition. It was found out that Cu-MFI zeolites obtained through direct synthesis are promising catalysts for NO decomposition, especially at lower reaction temperatures. The efficiency of the catalysts prepared by both methods is compared and discussed.

Słowa kluczowe

EN

Cu-MFI; zeolite; catalytic properties; direct hydrothermal synthesis; NO decomposition; medium reaction temperature range; redox

• Wydawca: De Gruyter
• Czasopismo: Materials Science Poland
• Rocznik: 2016
• Tom: Vol. 34, No. 1
• Strony: 177--184
• Opis fizyczny: Bibliogr. 32 poz., rys., tab.

Twórcy

autor

Valkaj K. M.

• Faculty of Chemical Engineering and Technology, University of Zagreb, Marulicev trg 19, 10000 Zagreb, Croatia

autor

Tomasic V.

• Faculty of Chemical Engineering and Technology, University of Zagreb, Marulicev trg 19, 10000 Zagreb, Croatia

autor

Katovic A.

• Universita della Calabria, Dipartimento di Ingegneria per l’Ambiente e il Territorio e Ingegneria Chimica, Ponte P. Bucci, Cubo 45 A, 87036 Rende (CS), Italia

autor

Bielanska E.

• Polish Academy of Sciences, Institute of Metallurgy and Materials Science, Reymonta 25, 30-059 Kraków, Poland

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Uwagi

Opracowanie ze środków MNiSW w ramach umowy 812/P-DUN/2016 na działalność upowszechniającą naukę.