Highly dispersed platinum honeycomb reforming catalysts: Sintering behavior and activity |
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| Authors: | F Frusteri A Parmaliana A Mezzapica A L Chuvilin P Tsiakaras and N Giordano |
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| Institution: | (1) Istituto CNR-TAE, Salita S. Lucia 39, 98126 S. Lucia, Messina, Italy;(2) Dipartimento di Chimica Industriale, Università degli Studi di Messina C.P. 29, 98166 S. Agata, Messina, Italy;(3) Institute of Catalysis, Prospekt Akademika Lavrentieva 5, 630090 Novosibirsk 90, Russia;(4) Present address: Institute of Chemical Engineering and High Temperature Chemical Processes, Department of Chemical Engineering, University of Patras, GR-26110 Patras, Greece |
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| Abstract: | The influence of chlorine regulation by steam treatment and of operation conditions in the dehydrogenation of methylcyclohexane (MCH) on the dispersity of chlorided Pt/ -Al2O3 honeycomb catalysts has been investigated by means of transmission electron microscopy (TEM). The loss of surface chlorine greatly promotes the sintering of small Pt crystallites (<20 Å), while the reaction testing does not affect the high dispersities of the catalysts. An original evidence of the antipathetic structure sensitive character for the dehydrogenation of MCH on highly dispersed Pt catalyst is provided.
                           Pt/-Al2O3  .   Pt (<20 Å), .
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