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The catalytic performance of sulfated zirconia in the dehydration of methanol to dimethyl ether

مؤلف البحث
Abd El-Aziz A. Said, , Mohamed M. Abd El-Wahab, Mohamed Abd El-Aal
ملخص البحث

Sulfated zirconia catalysts were prepared by wetness impregnation of zirconium hydroxide with an aqueous solution of (NH4)2SO4 with SO42− loadings (1–30%, w/w) and calcined at 450 °C for 3 h in a static air atmosphere. The catalysts were characterized by FT-IR, XRD, TEM and BET measurements. The surface acidity of the catalysts was investigated by the dehydration of isopropanol and the adsorption of pyridine (PY) and 2,6-dimethyl pyridine (DMPY). The catalysts were tested for dehydration of methanol in a fixed-bed reactor at 230 °C using air as a carrier gas. The results revealed that among different catalysts, 10% SO42− supported onto zirconia showed the highest catalytic activity with 83% conversion and 100% selectivity toward dimethyl ether. A good correlation was found between the acidity of the catalysts and their ability to dehydrate methanol.

قسم البحث
مجلة البحث
Journal of Molecular Catalysis A: Chemical
المشارك في البحث
تصنيف البحث
1
عدد البحث
Vol.394
سنة البحث
2014
صفحات البحث
PP.40–47