Activity and deactivation studies for direct dimethyl ether synthesis using CuO-ZnO-Al2O3 with NH4ZSM-5, HZSM-5 or γ-Al2O3

Jehad Abu-Dahrieh, David Rooney*, Alexandre Goguet, Youssef Saih

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

67 Scopus citations

Abstract

Herein we investigate the use of CuO-ZnO-Al2O3 (CZA) with different solid acid catalysts (NH4ZSM-5, HZSM-5 or γ-Al2O3) for the production of dimethyl ether from syngas. It was found that of the solid acids, which are necessary for the dehydration function of the admixed system, the CZA/HZSM-5 bifunctional catalyst with a 0.25 acid fraction showed high stability over a continuous period of 212h. As this particular system was observed to loose around 16.2% of its initial activity over this operating period this study further investigates the CZA/HZSM-5 bifunctional catalyst in terms of its deactivation mechanisms. TPO investigations showed that the catalyst deactivation was related to coke deposited on the metallic sites; interface between the metallic sites and the support near the metal-support; and on the support itself.

Original languageEnglish (US)
Pages (from-to)201-211
Number of pages11
JournalChemical Engineering Journal
Volume203
DOIs
StatePublished - Sep 1 2012

Keywords

  • Acid catalyst
  • CuO/ZnO/AlO catalyst
  • DME synthesis
  • Methanol dehydration
  • Methanol synthesis
  • Syngas

ASJC Scopus subject areas

  • Chemistry(all)
  • Environmental Chemistry
  • Chemical Engineering(all)
  • Industrial and Manufacturing Engineering

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