Effect of precursor on the performance of alumina for the dehydration of methanol to dimethyl ether

Ahmed Osman Ahmed, Jehad K. Abu-Dahrieh, David W. Rooney, Samih A. Halawy, A. Mohamed Mohamed, Adel Abdelkader, Jehad Abu-Dahrieh

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56 Citations (Scopus)
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Abstract

Dimethyl ether (DME) is amongst one of the most promising alternative, renewable and clean fuels being considered as a future energy carrier. In this study, the comparative catalytic performance of γ-Al2O3 prepared from two common precursors (aluminum nitrate (AN) and aluminum chloride (AC)) is presented. The impact of calcination temperature was evaluated in order to optimize both the precursor and pre-treatment conditions for the production of DME from methanol in a fixed bed reactor. The catalysts were characterized by TGA, XRD, BET and TPD-pyridine. Under reaction conditions where the temperature ranged from 180 °C to 300 °C with a WHSV = 12.1 h−1 it was found that all the catalysts prepared from AN(η-Al2O3) showed higher activity, at all calcination temperatures, than those prepared from AC(γ-Al2O3). In this study the optimum catalyst was produced from AN and calcined at 550 °C. This catalyst showed a high degree of stability and had double the activity of the commercial γ-Al2O3 or 87% of the activity of commercial ZSM-5(80) at 250 °C.
Original languageEnglish
Pages (from-to)307–315
Number of pages9
JournalApplied Catalysis B: Environmental
Volume127
Early online date05 Sep 2012
DOIs
Publication statusPublished - 30 Oct 2012

ASJC Scopus subject areas

  • Catalysis
  • Process Chemistry and Technology
  • Environmental Science(all)

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