轻稀土添加对Pt/KL重整催化剂性能的影响  

Effect of Light Rare Earth Additives on Properties of Pt/KL Reforming Catalyst

作　　者：李建勇[1] 周琢强[2] 

机构地区：[1]南昌大学基础医学院生物化学教研室,江西南昌330006 [2]华南农业大学理学院应用化学系,广东广州510642

出　　处：《中国稀土学报》2017年第2期203-208,共6页Journal of the Chinese Society of Rare Earths

摘　　要：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cs_2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 increa-ses 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.

关 键 词：Pt/KL催化剂 轻稀土 芳构化选择性 磁化率 稀土 

分 类 号：O643.3[理学—物理化学]