Reconstruction of the surface layer of platinum group metals in the thermal treatment in various gases and propane hydrogenolysis |
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| Authors: | V M Gryaznov M M Ermilova N V Orekhova |
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| Institution: | (1) Russian Peoples' Friendship University, 6 ul. Miklukho-Maklaya, 117923 Moscow, Russian Federation;(2) A. V. Topchiev Institute of Petrochemical Synthesis, Russian Academy of Sciences, 29 Leninsky prosp., 117912 Moscow, Russian Federation |
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| Abstract: | The enrichment with ruthenium of the surface layer of a Pd−Ru alloy tube during the propane hydrogenolysis was observed. Metal
particles immobilized within carbonaceous deposits and filamentous crystals of the metals with a carbon cover are formed on
the Rh and Ir wires. Thermal treatment in gases free of carbon compounds does not cause such a deep reconstruction. The deep
reconstruction occuring during the propane hydrogenolysis is the stronger, the greater the amount of carbon this metal dissolves.
Dedicated to the memory of Academician M. E. Vol'pin timed to his 75th birthday.
Translated fromIzvestiya Akademii Nauk, Seriya Khimicheskaya, No. 6, pp. 1100–1103, June, 1998. |
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| Keywords: | palladium ruthenium rhodium iridium catalysts propane hydrogenolysis |
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