Citation: Doaa S. EL-DESOUKI, Amina H. IBRAHIM, Samira M. ABDELAZIM, Noha A. K. ABOUL-GHEIT, Dalia R. ABDEL-HAFIZAR. The optimum conditions for methanol conversion to dimethyl ether over modified sulfated zirconia catalysts prepared by different methods[J]. Journal of Fuel Chemistry and Technology, ;2021, 49(1): 63-71. doi: 10.1016/S1872-5813(21)60009-9 shu

The optimum conditions for methanol conversion to dimethyl ether over modified sulfated zirconia catalysts prepared by different methods

1.
Processes Development Department, EPRI, Cairo 11727, Egypt
2.
Refining Department, EPRI, Cairo 11727, Egypt

Corresponding author: Noha A. K. ABOUL-GHEIT, nohakadry3yoa@yahoo.com
Received Date: 28 August 2020
Revised Date: 5 November 2020

Figures(6)

Sulfated zirconia (SZ) and two promoted 1%Mn/SZ catalysts which have been prepared via sol gel (Mn/SZ-S) and impregnation (Mn/SZ-I) methods were studied. The morphology of the catalysts was characterized by XRD, BET, NH₃-TPD, ICP, SEM and FT-IR analysis. The conversion of methanol to dimethyl ether and hydrocarbons was carried out in the temperature range of 120−300 °C. The Mn/SZ-S showed the highest activity due to the high surface area with suitable acidity. The optimum condition of Mn/SZ-S catalyst was investigated at 200 °C and LHSV of 0.02 h⁻¹ in a time range from 30 to 210 min. It was found that the total conversion decreased from 80.18% to 53.26% at 210 min. The reusability of this catalyst was studied at the optimum condition up till four cycles for 1 h. The characterization of the reused catalyst showed a significant change in the structure and surface acidity due to the blockage of the surface acid sited by carbonaceous materials.
- catalysts,
- dehydration,
- DME,
- sulfate content,
- sulfated zirconia
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