Improved methanol-to-olefin reaction selectivity and catalyst life by CeO2 coating of ferrierite zeolite

Sung Jun Park, Hoi Gu Jang, Kwan Young Lee, Sung June Cho

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

The catalytic performance of the methanol-to-olefin (MTO) reaction over ferrierite zeolite was improved greatly by introduction of a CeO2 coating that selectively masked the acid sites on the external surface of the catalyst. In the absence of this coating, significant deterioration of the catalytic performance was observed owing to coke formation on the external surface and resultant blockage of the portals. Selective coating of CeO2 on the external surface was investigated using transmission electron microscopy, temperature-programmed desorption of NH3, N2 adsorption–desorption isotherms, and xenon adsorption measurements to reveal the structure–activity relationship. The resulting catalytic performance of CeO2-coated ferrierite zeolite in the MTO reaction was similar to that of MFI or high-silica CHA zeolite. The observed preferential formation of C4,= and C6,=, ∼90% free of aromatics was obtained because of the negligible deposition of heavy coke. This work shows that selective CeO2 coating on ferrierite zeolite was effective during catalyst regeneration and hydrothermal aging, leading to extended catalyst life and improved selectivity for catalytic applications.

Original languageEnglish
Pages (from-to)155-164
Number of pages10
JournalMicroporous and Mesoporous Materials
Volume256
DOIs
Publication statusPublished - 2018 Jan 15

Fingerprint

Zeolites
Catalyst selectivity
Alkenes
alkenes
Olefins
Methanol
methyl alcohol
selectivity
coatings
catalysts
Coatings
Catalysts
coke
Coke
Catalyst regeneration
Xenon
Temperature programmed desorption
regeneration
deterioration
Silicon Dioxide

Keywords

  • CeO
  • Coke formation
  • Ferrierite
  • MTO reaction
  • Selective coating

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials

Cite this

Improved methanol-to-olefin reaction selectivity and catalyst life by CeO2 coating of ferrierite zeolite. / Park, Sung Jun; Jang, Hoi Gu; Lee, Kwan Young; Cho, Sung June.

In: Microporous and Mesoporous Materials, Vol. 256, 15.01.2018, p. 155-164.

Research output: Contribution to journalArticle

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N2 - The catalytic performance of the methanol-to-olefin (MTO) reaction over ferrierite zeolite was improved greatly by introduction of a CeO2 coating that selectively masked the acid sites on the external surface of the catalyst. In the absence of this coating, significant deterioration of the catalytic performance was observed owing to coke formation on the external surface and resultant blockage of the portals. Selective coating of CeO2 on the external surface was investigated using transmission electron microscopy, temperature-programmed desorption of NH3, N2 adsorption–desorption isotherms, and xenon adsorption measurements to reveal the structure–activity relationship. The resulting catalytic performance of CeO2-coated ferrierite zeolite in the MTO reaction was similar to that of MFI or high-silica CHA zeolite. The observed preferential formation of C4,= and C6,=, ∼90% free of aromatics was obtained because of the negligible deposition of heavy coke. This work shows that selective CeO2 coating on ferrierite zeolite was effective during catalyst regeneration and hydrothermal aging, leading to extended catalyst life and improved selectivity for catalytic applications.

AB - The catalytic performance of the methanol-to-olefin (MTO) reaction over ferrierite zeolite was improved greatly by introduction of a CeO2 coating that selectively masked the acid sites on the external surface of the catalyst. In the absence of this coating, significant deterioration of the catalytic performance was observed owing to coke formation on the external surface and resultant blockage of the portals. Selective coating of CeO2 on the external surface was investigated using transmission electron microscopy, temperature-programmed desorption of NH3, N2 adsorption–desorption isotherms, and xenon adsorption measurements to reveal the structure–activity relationship. The resulting catalytic performance of CeO2-coated ferrierite zeolite in the MTO reaction was similar to that of MFI or high-silica CHA zeolite. The observed preferential formation of C4,= and C6,=, ∼90% free of aromatics was obtained because of the negligible deposition of heavy coke. This work shows that selective CeO2 coating on ferrierite zeolite was effective during catalyst regeneration and hydrothermal aging, leading to extended catalyst life and improved selectivity for catalytic applications.

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