Aromatization of dimethyl and diethyl ethers on Mo2C-promoted ZSM-5 catalysts

Anita Kecskeméti, R. Barthos, F. Solymosi

Research output: Contribution to journalArticle

40 Citations (Scopus)

Abstract

The adsorption and reaction pathways of dimethyl and diethyl ethers have been investigated on pure and Mo2C-containing ZSM-5. The catalysts have been characterized by XPS and surface acidity measurements. FTIR spectroscopic measurements indicated that a fraction of both ethers dissociates on pure and Mo2C-promoted zeolites already at 180-200 K resulting in the formation of methoxy from dimethyl ether, and ethoxy from diethyl ether. TPD experiments following the adsorption at 300 K showed desorption profiles corresponding to starting compounds and their decomposition products (methane, ethene and propene). ZSM-5 effectively catalyzed the reaction of dimethyl and diethyl ether above 473 K to yield various olefins and aromatics. From dimethyl ether xylene and from diethyl ether toluene were the main aromatic compounds. Adding Mo2C to the zeolites greatly promoted the formation of aromatics very likely by catalyzing the aromatization of olefins formed in the reaction of ethers on zeolites.

Original languageEnglish
Pages (from-to)111-120
Number of pages10
JournalJournal of Catalysis
Volume258
Issue number1
DOIs
Publication statusPublished - Aug 15 2008

Fingerprint

Aromatization
diethyl ether
Zeolites
Ether
Ethers
ethers
catalysts
Catalysts
Alkenes
zeolites
Adsorption
Xylenes
alkenes
Aromatic compounds
Methane
Toluene
Temperature programmed desorption
Acidity
Olefins
Desorption

Keywords

  • Aromatization of diethyl ether
  • Aromatization of dimethyl ether
  • MoC/ZSM-5
  • ZSM-5

ASJC Scopus subject areas

  • Catalysis
  • Process Chemistry and Technology

Cite this

Aromatization of dimethyl and diethyl ethers on Mo2C-promoted ZSM-5 catalysts. / Kecskeméti, Anita; Barthos, R.; Solymosi, F.

In: Journal of Catalysis, Vol. 258, No. 1, 15.08.2008, p. 111-120.

Research output: Contribution to journalArticle

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N2 - The adsorption and reaction pathways of dimethyl and diethyl ethers have been investigated on pure and Mo2C-containing ZSM-5. The catalysts have been characterized by XPS and surface acidity measurements. FTIR spectroscopic measurements indicated that a fraction of both ethers dissociates on pure and Mo2C-promoted zeolites already at 180-200 K resulting in the formation of methoxy from dimethyl ether, and ethoxy from diethyl ether. TPD experiments following the adsorption at 300 K showed desorption profiles corresponding to starting compounds and their decomposition products (methane, ethene and propene). ZSM-5 effectively catalyzed the reaction of dimethyl and diethyl ether above 473 K to yield various olefins and aromatics. From dimethyl ether xylene and from diethyl ether toluene were the main aromatic compounds. Adding Mo2C to the zeolites greatly promoted the formation of aromatics very likely by catalyzing the aromatization of olefins formed in the reaction of ethers on zeolites.

AB - The adsorption and reaction pathways of dimethyl and diethyl ethers have been investigated on pure and Mo2C-containing ZSM-5. The catalysts have been characterized by XPS and surface acidity measurements. FTIR spectroscopic measurements indicated that a fraction of both ethers dissociates on pure and Mo2C-promoted zeolites already at 180-200 K resulting in the formation of methoxy from dimethyl ether, and ethoxy from diethyl ether. TPD experiments following the adsorption at 300 K showed desorption profiles corresponding to starting compounds and their decomposition products (methane, ethene and propene). ZSM-5 effectively catalyzed the reaction of dimethyl and diethyl ether above 473 K to yield various olefins and aromatics. From dimethyl ether xylene and from diethyl ether toluene were the main aromatic compounds. Adding Mo2C to the zeolites greatly promoted the formation of aromatics very likely by catalyzing the aromatization of olefins formed in the reaction of ethers on zeolites.

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