Synthesis of FER/MFI composite zeolite using isopropylamine as a structure-directing agent
Synthesis of FER/MFI composite zeolite using isopropylamine as a structure-directing agent
复制标题
以异丙胺为结构导向剂合成FER/MFI复合沸石
DOI：
10.1016/j.micromeso.2020.110027
复制
发表时间：
2020-05
期刊：
影响因子：
--
通讯作者：
Yueming Liu
中科院分区：
文献类型：
--
作者：
Kaixu Shen;Xin Huang;Jia Wang;Zhen Chen;Yunkai Yu;Zhimou Tang;Yueming Liu
A comprehensive investigation into the synthesis of the FER/MFI composite zeolite based on the isopropylamine-silica sol-NaAlO2-H2O system has been carried out. Parameters such as the Na2O/SiO2molar ratio, SiO2/Al2O3molar ratio, water concentration, and structure-directing agent (SDA) concentration were of great importance in the crystal phase transition and the morphology control. FER/MFI composite zeolites could be successfully prepared under the conditions of the SiO2/Al2O3molar ratio ranging from 20 to 30 in the gel mixture. SEM and TEM images showed that the two different crystals (FER and MFI frameworks) in FER/MFI composite zeolites had a state of co-existence and staggered growth, which was typical of composite zeolites. Among these factors influencing the synthesis process, adjusting the Na2O/SiO2molar ratio was easy to control the relative contents of each phase in the composite zeolites. The higher Na2O/SiO2molar ratio was, the more content of the FER phase was. NH3-TPD and FT-IR of adsorbed pyridine results showed the acidity properties of composite zeolites were significantly different from those of corresponding physical mixtures. Interestingly, the distribution of aluminum between the FER and MFI structures in the composite zeolites was unequal, and aluminum atoms tended to enrich in the phase predominating in the FER/MFI composite zeolites. The catalytic performance in the cracking of olefins like butene and pentene of the FER/MFI composite zeolite was superior to that of the pure ZSM-5 zeolite. The FER/MFI composite zeolite after further modification is expected to become an excellent catalyst for the catalytic cracking of low carbon olefins to ethylene and propylene.
登录
查看更多内容
影响因子：
5.2
作者：
Sujuan Xie;Shenglin Liu;Y. Liu;Xiujie Li;Weiping Zhang;Longya Xu
通讯作者：
Sujuan Xie;Shenglin Liu;Y. Liu;Xiujie Li;Weiping Zhang;Longya Xu
影响因子：
5.2
作者：
Burton, Allen W.;Zones, Stacey I.;Chan, Ignatius Y.
通讯作者：
Chan, Ignatius Y.
通过超极化 129Xe NMR 探测共结晶 MCM-49/ZSM-35 沸石的孔隙率
DOI：
10.1021/jp077396m.s002
发表时间：
2008
期刊：
影响因子：
--
作者：
通讯作者：
--
影响因子：
5.5
作者：
Guoliang Zhao;J. Teng;Yahong Zhang;Zaiku Xie;Y. Yue;Qingling Chen;Yi Tang
通讯作者：
Guoliang Zhao;J. Teng;Yahong Zhang;Zaiku Xie;Y. Yue;Qingling Chen;Yi Tang
影响因子：
4.2
作者：
Al-Dughaither, Abdullah S.;de Lasa, Hugo
通讯作者：
de Lasa, Hugo