研究了正己烷、甲基环戊烷在Pt/KL和Pt-RE/KL(RE=Ce,Nd,Sm)催化剂上的反应性能,以cs2为毒物,研究了稀土对Pt/KL催化剂抗硫性能的影响,用TPR,TPD考察了催化剂的表面性质,用法拉第磁天平测量了催化剂的磁化率.结果表明,轻稀土添加增加了Pt/KL催化剂的正己烷、甲基环戊烷的芳构化选择性,增加了催化剂的抗硫性能,发现添加稀土的催化剂的TPR,TPD的峰温及磁化率均低于Pt/KL催化剂.Pt-RE/KL催化剂的磁化率与正己烷和甲基环戊烷芳构化选择性有对应关系.
The conversion of n-hexane or methylcyclopentane was studied on Pt/KL and Pt-RE/KL catalysts (RE =Ce,Nd,Sm).The influence of RE on the sulfur resistance of the Pt/KL catalyst was also studied with absorbed cs2 poison.The surface behaviour of catalysts were investigated by using TPR,TPD.The magnetic properties of catalysts were studied using a Faraday magnetic balance.It was found that the addition of rare earth increases the aromatization selectivity of n-hexane and methyl cyclopentane,and sulfur resistance of Pt/KL catalyst.The results of experiments showed that all of the RE elements make the temperature peaks of TPR and TPD shift to the lower temperatures.The magnetic susceptibilities of the Pt-RE/KL catalyst were found to be lower than that of Pt/KL catalyst.A relationship between the aromatization selectivity of n-hexane or MCP and the magnetic susceptibility of the Pt-RE/KL catalyst has been observed
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