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化学学报
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化学学报 ›› 2002, Vol. 60 ›› Issue (5): 759-763.    下一篇

研究论文

含有沸石结构单元体介孔材料的合成及催化性能

李工;阚秋斌;吴通好;章慧杰   

  1. 吉林大学化学系,长春(130023)
  • 发布日期:2002-05-15

Synthesis and Catalytic Performance of Mesoporous Material with Pore Wall Composed of the Primary Structure Units of Zeolite

Li Gong;Kan Qiubin;Wu Tonghao;Zhang Huijie   

  1. Department of Chemistry, Jilin University,Changchun(130023)
  • Published:2002-05-15

PDF

578

被引次数

133 | 16

采用两步晶化法合成了孔壁含沸石初级结构单元的六方介孔材料，用XRD， N_2吸附－脱附，TEM，IR和NH_3TPD对样品进行了表征，考察了晶化时间、碱度、 温度和NH_4~+离子交换对样品的影响。结果表明合成的介孔材料（AlMB41）在结构 上和AlMCM-41类似，并且没有发现β沸石相的存在。样品具有较高的热稳定性。氢 型AlMB41用有强酸位，在催化异丙苯裂解和2，4－二叔丁基苯酚与叔丁醇的烷基化 反应中，其催化活性明显高于常规法合成的AlMCM-41。

关键词: 沸石, X射线衍射分析, 氮, 吸附, 透射电子显微术, 催化活性, 异丙苯, 裂解

Mesoporous materials with the primary structure units of zeolite in the pore wall have been synthesized by a two-step crystallization process at 140 ℃ and characterized by XRD, N_2 physical adsorption/desorption, TEM, IR and NH_3-TPD methods. The effects of crystallization time, alkalinity, temperature and NH_4~+ ion exchange on the synthesized products were investigated. The results demonstrated that the synthesized samples (AlMB41) were similar to AlMCM-41 in the long-range structure and did not contain zeolite phases. The samples exhibited high thermal stability. H-type AlMB41s have stronger acid sites and higher catalytic activity for cumene cracking and alkylation of 2, 4-tert-butylphenol with tert- butylalcohol than traditional AlMCM-41.

Key words: ZEOLITE, XRD, NITROGEN, ADSORPTION, TEM, CATALYTIC ACTIVITY, ISOPROPYLBENZENE, PYROLYSIS

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