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Effects of Additives on Inhibition of Carbon Deposition on Pt/Al_2O_3 and Pt-Sn/Al_2O_3 Catalysts

Zhang Tao Xu Zhusheng Wang Linsheng Zang Jingling Lin Liwu (Dalian Institute of Chemical Physics,Academia Sinica)  
The effects of the alkali metal Li and the rare earth elements Y,La,Pr,Nd,Sm,Yb on inhibition of carbon deposition on Pt/Al_2O_3 and Pt-Sn/Al_2O_3 catalysts-have been studied by means of TPO,TPR,NH_3-TPD and n-butane dehydrogena-tion measurements.It has been found that Li can inhibit the formation of carbondeposits on both the metal surface and the support surface of the catalysts.As aresult,Li enhances the activity and the stability of the catalysts,However,the rare,earth elements exert only slight effects upon carbon deposition on the catalysts.
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