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  • 刘新 ( 副教授 )

    的个人主页 http://faculty.dlut.edu.cn/xliu/zh_CN/index.htm

  •   副教授   博士生导师   硕士生导师
论文成果 当前位置: 中文主页 >> 科学研究 >> 论文成果
Synthesis of Zeolite Omega by the Magadiite Conversion Method and Insight into the Changes of Medium-Range Structure during Crystallization

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论文类型:期刊论文
第一作者:Lv, Tianming
通讯作者:Wang, Y (reprint author), Dalian Univ Technol, Sch Chem, Dalian 116024, Peoples R China.
合写作者:Zhang, Shoulei,Feng, Zhe,Wang, Fushi,Zhang, Shaoqing,Zheng, Jiqi,Liu, Xin,Meng, Changgong,Wang, Yu
发表时间:2017-07-01
发表刊物:CRYSTAL GROWTH & DESIGN
收录刊物:SCIE、EI、Scopus
卷号:17
期号:7
页面范围:3940-3947
ISSN号:1528-7483
摘要:Zeolite omega has been synthesized directly in the presence of tetramethylammonium ions (TMA(+)) by the magadiite conversion method. Using the reactive gel composition: 20SiO(2): Al2O3: 3.6Na(2)O: 180H(2)O: 0.96TMABr, pure and high crystalline zeolite omega could be obtained at 100 degrees C for 72 h. It is found that most of the long-range order structure of magadiite was retained, even though part of it was collapsed, as its primary structure during the crystallization process. Meanwhile, the crystallization behavior and changes of medium-range structure in the synthesis were characterized. The growth of zeolite omega occurs on the surface of magadlite, and 4-membered rings probably from the connection by 5-membered rings are formed after 10 h. The Al atoms prefer to occupy the position in 6-membered rings of gmelinite in zeolite omega. The influence of reaction time, temperature, and composition in starting gel was examined.

 

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