Conversion of Ethanol into a Fraction of C3+ Hydrocarbons in the Presence of Gold-Containing Catalysts Based on a Zeolite MFI Support |
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Authors: | A. V. Chistyakov P. A. Zharova M. A. Gubanov S. A. Nikolaev T. B. Egorova A. E. Gekhman M. V. Tsodikov |
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Affiliation: | 1.Topchiev Institute of Petrochemical Synthesis,Russian Academy of Sciences,Moscow,Russia;2.Moscow State University,Moscow,Russia;3.Kurnakov Institute of General and Inorganic Chemistry,Russian Academy of Sciences,Moscow,Russia |
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Abstract: | The results of a study on the activity and operational stability of an Au–Pd/MFI/Al2O3 catalyst in the reaction of ethanol conversion into a gasoline fraction of hydrocarbons are reported. In the presence of the Au–Pd/MFI/Al2O3 catalyst, ethanol was almost completely converted into an alkane–aromatic fraction of C3–C11 hydrocarbons at 300°C in an atmosphere of Ar; the yield of this fraction was as high as 90% on a feed carbon basis. It was established that, in the presence of the bimetallic Au–Pd catalyst, the yield of the target fraction increased by 10%, as compared with that on a monometallic Au-containing sample. The Au–Pd/MFI/Al2O3 catalyst exhibited much higher stability in a long-term experiment in comparison with the previously tested pilot sample of Pd–Zn/MFI/Al2O3. After a 40-h operation, the yield of the target fraction of C3+ hydrocarbons in the presence of the Au–Pd/MFI/Al2O3 catalyst decreased by 15%. The treatment of the catalyst with hydrogen led to the complete restoration of its activity. The structure of the Au–Pd active constituents was studied by transmission electron microscopy X-ray photoelectron spectroscopy. methods of the and microscopy. |
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