Ammonolysis of ethanol on pure and zinc oxide modified HZSM-5 zeolites |
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| Affiliation: | 1. Institut des Molécules et Matériaux du Mans, UMR 6283 CNRS − Le Mans Université, Avenue Olivier Messiaen, 72085 Le Mans, Cedex 9, France;2. Lycée Notre Dame, 23 Avenue François Mitterrand, 72000 Le Mans, France;1. School of Materials Science, Japan Advanced Institute of Science and Technology, 1-1 Asahidai, Nomi-shi, Ishikawa 9231211, Japan;2. Centre for Fuel Cell Technology, International Advanced Research Centre for Powder Metallurgy and New Materials, Phase I - 2nd Floor, IITM Research Park Taramani, Chennai 600113, India |
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| Abstract: | Reaction between ethanol and ammonia have been studied on various zinc oxide modified HZSM-5 (Si/Al=225) catalysts under various conditions of temperature, C/N ratio of the reactants and their WHSV. Two pure zinc oxides were taken for the study. One was a highly active acidic form Z1 and the other was a stoichiometric non acidic zinc oxide Z2. The activity of the catalysts for ammonolysis reaction followed the order Z2⪡Z1⪡HZSM-5. However, for composite catalysts containing 10–40% Z1 on HZSM-5, the activity increased synergistically and became maximum (∼81% conversion of alcohol) for the catalyst 40% Z1/HZSM-5 and about 50% conversion for the catalyst 40% Z2/HZSM-5. The products formed were mainly N-heterocycles. Some novel high molar mass N-heterocycles were also detected. The catalytic activity and product selectivity was crucially affected by the reaction conditions, particularly the effect of temperature; the optimum yield of the products was obtained at the catalyst temperature of 723 K, C/N ratio 0.3892 and WHSV of 2.5 h−1. |
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