含铝、镓层柱材料的表面酸性及催化性能  

STUDY ON SURFACE ACIDITY AND CATALYTIC PROPERTIES OF PILLARED MATERIALS WITH GALLIUM AND ALUMINUM

作　　者：赵谦[1] 田军[2] 陶涛[1] 刘华[1] 尹盛[1] 白茹[1] 

机构地区：[1]江苏大学化学化工学院,江苏镇江212013 [2]绥化学院,黑龙江绥化152000

出　　处：《精细石油化工》2005年第5期5-8,共4页Speciality Petrochemicals

基　　金：江苏省教育厅自然科学基金资助(04KJB30040);江苏大学微纳米中心开放基金资助(1291400001)

摘　　要：用水热法合成了含铝和镓的两种皂石,并进行交联制得不同柱高及柱含量的铝、镓层柱材料。用 XRD、NH_3-TPD、FT-IR 表征了试样的晶相、表面酸量、酸类型和酸强度,考察了试样对β-甲基萘岐化反应的催化性能。结果表明:层柱材料的晶相完整,高柱试样及交联合成土试样的酸量大,试样的 L 酸中心大于 B 酸中心。酸量越大活性越高;层柱材料催化β-甲基萘主要以异构反应为主,强的 B 酸中心和较多的 L 酸中心有利于β-甲基萘发生岐化反应。Two saponites with aluminum and gallium were synthesized by a hydrothermal method. Aluminum and gallium substituted pillared materials with different pillar height and contents were prepared by cross-linking with hydroxyl aluminum oligomer. The crystallinity, acid amount, acid intensity and types of surface acid of the above samples were characterized by XRD, IR and NH3-TPD. The catalytic properties of the samples were studied in β-methylnaphthalene（β-MN） disproportionation reaction. The results showed that pillared materials with clear crystal and different pillar height were obtained. The acid amounts of highly pillared samples and cross-linking synthetic clays were higher than others. The number of Lewis （L） acid centre was higher than that of Bronsted（B） acid. The higher the acid amounts, the higher the activity, β-MN was mainly converted into α-MN by isomeriza- tion by the acid catalysts. The strong B acid and more L acid centres are favorable for β-MN disproporationation reaction.

关 键 词：层柱材料 酸性 Β-甲基萘 催化活性 铝 镓 

分 类 号：TQ426.61[化学工程]