Mechanistic difference of methanol-to-olefins (MTO) and ethanol-to-olefins (ETO) reactions over H-ZSM-5 catalysts

Qiang Wu, Wei Xia, Atsushi Takahashi, Tadahiro Fujitani

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

The Methanol to olefins (MTO) and ethanol to olefins (ETO) reactions were compared under the similar operation conditions, and it was proved that both follow the different reaction mechanism over H-ZSM-5 catalysts. In MTO reaction, dimethyl ether (DME) acts as the initial intermediate, which then follows two different reaction pathways depending on the acidity of H-ZSM-5 catalysts, namely, the dehydration of DME into ethene over higher acidity of H-ZSM-5 catalysts and the merization of DME through hydrogen bonds into (DME)n (n = 2-4) complexes over lower acidity of H-ZSM-5 catalysts. Further, over higher acidity of H-ZSM-5 catalysts, ethene converts into propene and butene, and thereafter undergoes the oligomerization-craking-aromatization route to form other olefins, paraffins and aromatics. But over lower acidity of H-ZSM-5 catalysts, (DME)n complexes tend to transform into high even number of olefins that are easily cracked into small olefins. In the case of ETO reaction, ethene acts as the main reaction intermediate, which then transforms into propene and butene, and further proceeds through the oligomerization-craking-aromatization route to form other olefins, paraffins and aromatics products over H-ZSM-5 catalysts.

Original languageEnglish
Title of host publicationMaterials Processing Technology II
Pages2417-2420
Number of pages4
DOIs
Publication statusPublished - 2012 Nov 9
Externally publishedYes
Event2nd International Conference on Advanced Engineering Materials and Technology, AEMT 2012 - Zhuhai, China
Duration: 2012 Jul 62012 Jul 8

Publication series

NameAdvanced Materials Research
Volume538-541
ISSN (Print)1022-6680

Other

Other2nd International Conference on Advanced Engineering Materials and Technology, AEMT 2012
CountryChina
CityZhuhai
Period12/7/612/7/8

Keywords

  • Ethanol to olefins (ETO)
  • H-ZSM-5
  • Mechanistic difference
  • Methanol to olefins (MTO)

ASJC Scopus subject areas

  • Engineering(all)

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  • Cite this

    Wu, Q., Xia, W., Takahashi, A., & Fujitani, T. (2012). Mechanistic difference of methanol-to-olefins (MTO) and ethanol-to-olefins (ETO) reactions over H-ZSM-5 catalysts. In Materials Processing Technology II (pp. 2417-2420). (Advanced Materials Research; Vol. 538-541). https://doi.org/10.4028/www.scientific.net/AMR.538-541.2417