Hydrodechlorination of dichlorodifluoromethane on carbon‐supported Group VIII noble metal catalysts

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• 作者：Kulkarni ; Parag P. ; Deshmukh ; Subodh S. ; Kovalchuk ; Vladimir I. ; d&rsquo ; Itri ; Julie L.
• 关键词：dichlorodifluoromethane ; difluoromethane ; ethylene ; tetrafluoroethylene ; hydrodechlorination ; dechlorinative oligomerization ; activated carbon ; noble metals
• 刊名：Catalysis Letters
• 出版年：1999
• 出版时间：1999
• 年：1999
• 卷：61
• 期：3/4
• 页码：161-166
• 全文大小：KB

文摘

Activated carbon‐supported Group VIII noble metals formed CF$\_\{2\}$Cl$\_\{2\}$ oligomerization products under hydrodechlorination conditions. All the catalysts underwent deactivation during first 15–20 h on stream at 250$\backslash ,\{\}^\backslash circ$C independent of the H$\_\{2\}$ partial pressure, with steady‐state activity following the order: Pt$\{\}>\{\}$Pd$\{\}\backslash gg\{\}$Ir$\{\}>\{\}$Ru$\{\}\backslash approx\{\}$Os$\{\}\backslash approx\{\}$Rh. The Pd/C catalyst exhibited high selectivity toward C$\_\{2\}$–C$\_\{3\}$ hydrocarbons ($\backslash sim$75 % at CF$\_\{2\}$Cl$\_\{2\}$/H$\_\{2\}=\; 1$). For the other catalysts except Pt, CF$\_\{2\}\{=\}$CF$\_\{2\}$ and CH$\_\{2\}\{=\}$CF$\_\{2\}$ were the main C$\_\{2+\}$ products.