An ultraviolet Raman spectroscopic study of coke formation in methanol to hydrocarbons conversion over zeolite H-MFI

Yek Tann Chua, Peter C Stair

Research output: Contribution to journalArticle

105 Citations (Scopus)

Abstract

The formation of retained hydrocarbons or coke in the conversion of methanol and dimethylether to hydrocarbons over zeolite H-MFI was studied using ultraviolet Raman spectroscopy. Polyolefin, cyclopentadienyl species, and polyaromatic hydrocarbons have been identified among the retained hydrocarbons from the Raman spectra. The results strongly support a reaction mechanism, proposed previously, where cyclopentadienyl species are identified as a key intermediate in the formation of aromatic and polyaromatic hydrocarbons by ring expansion. The spectra also suggest that the polyaromatic hydrocarbons have a chain-like topology, similar to polycenes, rather than a two-dimensional, sheet-like topology, similar to pyrene or coronene.

Original languageEnglish
Pages (from-to)39-46
Number of pages8
JournalJournal of Catalysis
Volume213
Issue number1
DOIs
Publication statusPublished - 2003

Fingerprint

Zeolites
coke
Hydrocarbons
Coke
Methanol
methyl alcohol
hydrocarbons
topology
Topology
Pyrene
Polyolefins
ultraviolet spectroscopy
pyrenes
Ultraviolet spectroscopy
Raman spectroscopy
Raman scattering
Raman spectra
expansion
rings

Keywords

  • Coking
  • Cyclopentadiene
  • H-MFI
  • Methanol
  • Polyaromatic
  • Polyolefin
  • Raman

ASJC Scopus subject areas

  • Catalysis
  • Process Chemistry and Technology

Cite this

An ultraviolet Raman spectroscopic study of coke formation in methanol to hydrocarbons conversion over zeolite H-MFI. / Chua, Yek Tann; Stair, Peter C.

In: Journal of Catalysis, Vol. 213, No. 1, 2003, p. 39-46.

Research output: Contribution to journalArticle

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