Authors: GÜLİN SELDA POZAN SOYLU, AJDA IŞIK, İSMAİL BOZ
Abstract: The dehydroisomerization of n-butane to isobutene over Pt/metal/sulphated zirconia catalysts was studied at 550 °C and 1 Atm. Sulfated zirconia catalysts (SZ), promoted with Al, Mn, Cu and Ni, were synthesized by coprecipitation. The catalysts were characterized by AAS, ICP-MS, TGA, and XRD. Effects of metals, sulfur content, and crystallite size of the samples on the selectivity and yield to isobutene were investigated. The increase in crystallite size and sulfur content caused an increase in the selectivity of total butenes. The presence of platinum and second metal improved the catalytic stability and isomerization selectivity of SZ catalyst for n-butane isomerization. SZ catalyst with aluminum showed much higher selectivity towards isobutene than the unpromoted ones.
Keywords: Sulfated zirconia, n-Butane, Catalyst Characterization, Dehydroisomerization.
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