Conversion of decalin and 1-methylnaphthalene over AlSBA-15 supported Pt catalysts

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• 作者：K. Jaroszewska ; ^{karolina.jaroszewska@pwr.wroc.pl} ; A. Masalska ; K. B?czkowska ; J.R. Grzechowiak
• 关键词：Decalin ; Ring opening ; 1-Methylnaphthalene ; Hydrogenation ; Platinum catalyst ; AlSBA-15
• 刊名：Catalysis Today
• 出版年：2012
• 出版时间：30 November, 2012
• 年：2012
• 卷：196
• 期：1
• 页码：110-118
• 全文大小：928 K

文摘

Platinum catalysts (1.5 wt. % ) containing AlSBA-15 obtained with various aluminium precursors were tested for activity in 1-methylnaphthalene hydrogenation. Experiments were carried out in a continuous-flow system at atmospheric pressure (240-350 ¡ãC, W/F = 0.8 g s/cm³). It was found that 1-methylnaphthalene conversion over Pt-loaded catalysts was not influenced by the aluminium precursor used in the preparation of the Pt/AlSBA-15 catalysts. However, the Pt catalyst prepared with AlSBA-15 obtained from aluminium sulphate provided a higher cis-methyldecalins/trans-methyldecalins ratio in the reaction products as compared to the catalysts obtained with aluminium nitrate or aluminium isopropoxide. Consideration was also given to the influence of platinum amount (0.5, 2.5 and 4.5 wt. % ) on the catalytic performance of bifunctional Pt/AlSBA-15 catalysts (AlSBA-15 obtained with aluminium sulphate) in decalin hydroconversion. It was shown that impregnation of AlSBA-15 with H₂PtCl₆ increased Br?nsted acidity. Investigations into decalin conversion were conducted in a continuous-flow system with a fixed-bed reactor (5 MPa, 300-380 ¡ãC, H₂:CH = 500 N m³/m³; WHSV = 2 h^?1). Incorporation of 0.5 wt. % Pt into AlSBA-15 yielded a catalyst with the highest dispersion of the platinum phase and the highest yield of ring opening products, amounting to 26.4 wt. % at 380 ¡ãC.