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New insights about coke deposition in methanol-to-DME reaction over MOR-, MFI- and FER-type zeolites
Massimo Migliori,Enrico Catizzone,Alfredo Aloise,Giuseppe Bonura,Luis Gómez-Hortigüela,Leone Frusteri,Catia Cannilla,Francesco Frusteri,Girolamo Giordano 한국공업화학회 2018 Journal of Industrial and Engineering Chemistry Vol.68 No.-
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.