Synthesis and characterization of the Pt/Al2O3 systems modified with group III (Ga) and Group IV (Ge,Ti, and Zr) elements in the combined conversion of propane and n-Heptane |
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| Authors: | V V Pashkov D V Golinskii I E Udras A S Kireeva E A Paukshtis K S Buyal’skaya T I Gulyaeva A S Belyi |
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| Institution: | 1. Institute of Hydrocarbons Processing, Siberian Branch, Russian Academy of Sciences, Omsk, 644040, Russia
2. Boreskov Institute of Catalysis, Siberian Branch, Russian Academy of Sciences, Novosibirsk, 630090, Russia
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| Abstract: | Under the conditions of a joint reaction of propane and n-heptane at temperatures of 460–520°C and a pressure of 0.35 MPa, the conversion of propane and the concentration of C7+ aromatization products on platinum-containing catalysts modified by Group III (Ga) and Group IV (Ge, Ti, and Zr) elements were higher than those on an unmodified Pt/Al2O3 sample. This is explained by a change in the aprotic acidity of the catalysts as a result of the support modification. The sample with the addition of gallium was most active. A plausible reason for this is the conversion of hydrocarbons at active sites that consist of Pt and Ga, which were formed upon catalyst activation. It is believed that gallium adjacent to platinum in an ionic form on the support surface acts as an aprotic acid site. |
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