燃料化学学报2016，Vol.44Issue(11)：1363-1369,7.
一步法合成多级孔结构ZSM-5分子筛
One-step synthesis of hierarchical-structured ZSM-5 zeolite
摘要
Abstract
Generally, the process for synthesis of hierarchical-structured ZSM-5 zeolite is complex. Here, the polygonal three-dimensional ZSM-5 zeolite with hierarchical structure was hydrothermally synthesized by one-step synthesis method with dual templates. The effects of crystallization conditions and synthesis gel compositions, including crystallization temperature, crystallization time, Si/Al molar ratio, on the products were investigated for optimizing synthesis conditions. The X-ray diffraction ( XRD) , N2 adsorption-desorption experiment, Pyridine adsorption FT-IR ( Py-FTIR) , scanning electron microscopy ( SEM) and transmission electron microscope ( TEM) were used to characterize the crystalline structure, pore structure, surface acidity and crystal morphology of products. It was shown that the hierarchical-structured ZSM-5 zeolite can be synthesized under the following conditions:crystallization temperature of 160-180℃, crystallization time of 24-96 h, the SiO2/Al2 O3/Na2 O/CTAB/TPABr/H2 O ratio of 1/x/0. 4/0. 05/0. 12/280, (x:50-240). The sample crystallized at 160℃ for 48 h with a synthesis gel having a Si/Al molar ratio of 50 had uniform cylindrical crystal morphology, high crystallinity and ordered mesoporous structure with a pore diameter of 3. 60 nm. It contains both strong Brønsted and Lewis acid sites at 300℃, which contribute to its catalytic properties.关键词
一步法/双模板剂/多级孔结构/ZSM-5分子筛/合成条件Key words
one-step synthesis method/dual templates/hierarchical structured/ZSM-5/synthesis conditions分类
化学化工引用本文复制引用
余道轲,符美丽,袁亚辉,宋一兵,陈佳阳,方奕文..一步法合成多级孔结构ZSM-5分子筛[J].燃料化学学报,2016,44(11):1363-1369,7.基金项目
The project was supported by the National Fund Cultivation Project ( NFC 15001), the Science and Technology Plan Project of Guangdong Province (2013B030600001) and the Subject and Specialty Construction Special Fund of Guangdong Provincial Higher Education Institution (2012CXZD0024,2013KJCX0081).国家基金培养项目(NFC 15001),广东省科技计划项目(2013B030600001)和广东省高等学校学科与专业建设专项基金(2012CXZD0024,2013KJCX0081)资助 （ NFC 15001）
