无机盐工业
主管:中海油天津化工研究设计院有限公司
主办:中海油天津化工研究设计院有限公司
   中海油炼油化工科学研究院(北京)有限公司
   中国化工学会无机酸碱盐专业委员会
ISSN 1006-4990 CN 12-1069/TQ

无机盐工业 ›› 2016, Vol. 48 ›› Issue (7): 68-.

• 论文 • 上一篇    下一篇

碱处理对高岭土微球上原位合成 ZSM-5分子筛的影响

刘明慧1,魏振浩1,周 茁1,朱学栋1,2   

  1. 1.华东理工大学工业大型反应工程教育部工程研究中心,上海200237;2.华东理工大学化学工程联合国家重点实验室
  • 出版日期:2016-07-10 发布日期:2016-07-25

Effect of alkali treatment on in-situ synthesis of ZSM-5 zeolite on calcined kaolin microspheres

Liu Minghui1,Wei Zhenhao1,Zhou Zhuo1,Zhu Xuedong1,2   

  1. 1.Engineering Research Center of Large Scale Reactor Engineering and Technology,East China University of Science and Technology,Shanghai 200237,China;2.State Key Laboratory of Chemical Engineering,East China University of Science and Technology
  • Published:2016-07-10 Online:2016-07-25

摘要: 以碱处理的焙烧高岭土微球(CKM)为载体,采用原位合成方法成功制备了ZSM-5分子筛。考察了碱处理条件对原位合成的影响。采用XRD、FESEM、N2吸附-脱附、NH3-TPD对合成样品进行了表征。结果表明:碱处理条件对晶化产物的化学组成、形貌结构有显著影响。7.4%(质量分数)的氢氧化钠溶液在95 ℃、1.5 h条件下处理的 CKM表面合成出纯相的ZSM-5分子筛,颗粒尺寸约为0.8~1 μm,比表面积为128 m2/g,总孔容、微孔比表面积和酸量均明显增加。

关键词: 碱处理, 焙烧高岭土微球, 原位合成, ZSM-5分子筛

Abstract: ZSM-5 zeolite on alkaline-treated calcined kaolin microspheres(CKM) was in-situ synthesized by hydrothermal crystallization method.The effects of alkali treatment conditions on in-situ synthesis of ZSM-5 zeolite were investigated.The synthesized samples were characterized by XRD,FESEM,N2 adsorption-desorption,and NH3-TPD respectively.Results showed that alkali treatment conditions had significant impacts on the chemical compositions and morphologies of ZSM-5 zeolite.Small-sized ZSM-5 crystallites,with 0.8~1 μm in size and with 128 m2/g in specific surface area were optimally formed on CKM at 95 ℃ for 2 h using 7.4%(mass fraction) NaOH solution.The synthesized products had larger specific surface area,pore volume,and stronger acidity.

Key words: alkali treatment, calcined kaolin microspheres, in-situ synthesis, ZSM-5 zeolite

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