Binder effect on the catalytic activity of MoO₃ bulk catalyst reduced by H₂ for n-heptane hydroisomerization

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• 作者：Laura Olivia Alem谩n-V谩zquez ; Fidencio Hern谩ndez-P茅rez ; Jos茅 Luis Cano-Dom铆nguez ; Andrea Rodr铆guez-Hern谩ndez ; Jos茅 Luis Garc铆a-Guti茅rrez
• 关键词：Hydroisomerization ; Molybdenum trioxide ; n-Heptane ; Catalysis ; Bulk catalyst
• 刊名：Fuel
• 出版年：30 January, 2014
• 年：2014
• 卷：117
• 期：part_PA
• 页码：463-469
• 全文大小：992 K

文摘

Two bulk catalysts containing about 70 wt.% of molybdenum trioxide and alumina or silica as binder were prepared by a gel method. They were characterized by X-ray diffraction, Raman spectroscopy, TGA in air and textural properties. The MoO₃ bulk catalysts were activated in situ by reduction with hydrogen and tested in the hydroisomerization of n-heptane using a fixed bed continuous flow microreactor coupled to gas chromatograph. The highest catalytic activity for hydroisomerization was obtained with the alumina-based bulk catalyst, although the silica-based bulk catalyst showed lower amounts of cracking products and a higher selectivity to dimethylpentanes. The bulk catalysts resulted more active than MoO₃ powder. The results indicate that the acid-base properties of the binder have a desirable effect on the acidity of the molybdenum trioxide powder as hydroisomerization catalyst.