The effect of channel-system of zeolite on methanol-to-DME reaction was studied. Results revealed that channels size and topology affect catalyst lifetime, type and location of coke precursors. FER and MFI showed the best resistance towards coke deposition, whilst fast deactivation was observed on MOR. Although the higher concentration and strength of acid sites, FER structure formed a lower coke amount, preferably located within the pores, while coke cluster deposited on the external surface of MOR. Analysis of acid sites distribution and strength was performed during deactivation–regeneration process. Coke location assessment was also supported by molecular simulations.

New insights about coke deposition in methanol-to-DME reaction over MOR-, MFI- and FER-type zeolites

Migliori, Massimo
;
Catizzone, Enrico;Aloise, Alfredo;Giordano, Girolamo
2018

Abstract

The effect of channel-system of zeolite on methanol-to-DME reaction was studied. Results revealed that channels size and topology affect catalyst lifetime, type and location of coke precursors. FER and MFI showed the best resistance towards coke deposition, whilst fast deactivation was observed on MOR. Although the higher concentration and strength of acid sites, FER structure formed a lower coke amount, preferably located within the pores, while coke cluster deposited on the external surface of MOR. Analysis of acid sites distribution and strength was performed during deactivation–regeneration process. Coke location assessment was also supported by molecular simulations.
Carbon deposit location; Catalyst deactivation; Coke composition; Coke deposition; Methanol-to-DME reaction
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/20.500.11770/285509
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