Synthesis, Characterization, and Catalytic Properties of Interlayer Expanded Aluminosilicate IEZ-PLS-3
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- 作者：Boting Yang ; Haihong Wu ; Peng Wu
- 刊名：Journal of Physical Chemistry C
- 出版年：2014
- 出版时间：October 23, 2014
- 年：2014
- 卷：118
- 期：42
- 页码：24662-24669
- 全文大小：423K
- ISSN：1932-7455
文摘
An interlayer expanded zeolite IEZ-PLS-3 was postsynthesized from the lamellar precursor of PLS-3 aluminosilicate by interlayer silylation with diethoxydimethylsilane (DEDMS) in HCl鈥揈tOH solution at 443 K for 20 h. The resulting material was characterized by various techniques such as XRD, SEM, adsorption of N2, water, and benzene, and IR and NMR spectroscopies, and its catalytic properties were investigated by comparison to those of other zeolites with similar Si/Al ratios in m-xylene isomerization/disproportionation, Friedel鈥揅rafts alkylation of anisole with benzyl alcohol, and acylation of anisole with acetic anhydride. The interlayer expansion created new 12 脳 10-membered ring (MR) pores in IEZ-PLS-3. IEZ-PLS-3 showed a larger adsorption capacity of benzene than conventional PLS-3 with 10 脳 8-MR channels. In the m-xylene isomerization/disproportionation reaction, IEZ-PLS-3 showed a higher conversion than PLS-3 and gave an isomerization to disproportionation ratio close to that of Beta zeolite, characteristic of shape-selective properties of 12-MR zeolites. IEZ-PLS-3 was more active than Beta in Friedel鈥揅rafts alkylation and acylation reactions, implying that it is a promising solid acid catalyst for processing bulky molecules.