Synthesis of hierarchical micro/mesoporous Y-zeolites by pseudomorphic transformation
Synthesis of hierarchical micro/mesoporous Y-zeolites by pseudomorphic transformation
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DOI：
10.1016/j.colsurfa.2012.12.024
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发表时间：
2013-11-20
影响因子：
5.2
通讯作者：
Ebbinghaus, S. G.
中科院分区：
文献类型：
--
作者：
Einicke, W. -D.;Uhlig, H.;Ebbinghaus, S. G.
研究了以含DAY分子筛圆柱体的粘结剂为原料，通过假晶转化法合成分级Y分子筛。根据转化时间和反应混合物中的氢氧化物浓度进行转化。虽然转化的材料在短的转化时间后没有显示出典型的MCM-41结构，但氢氧化物浓度的变化导致具有高质量的MCM-41相的微/介孔复合材料。通过第二种途径可以制备微孔和中孔体积之间具有灵活比例的分级材料。甚至纯的MCM-41挤出物也是基于起始沸石合成的。采用氮气物理吸附、X射线衍射（XRD）、电感耦合等离子体发射光谱（ICP-OES）、透射电子显微镜（TEM）和断裂电阻测试等手段对样品进行了表征。DAY圆柱体在沸石相完全转化后保持完整。(C)2013爱思唯尔有限公司版权所有。
The study focused on the synthesis of hierarchical Y zeolites by the pseudomorphic transformation of binder containing DAY zeolite cylinders. The transformation was carried out in dependence on the transformation time and the hydroxide concentration in the reaction mixture. While the transformed materials showed no typical MCM-41 structures after short transformation times, the variation of the hydroxide concentration resulted in micro/mesoporous composites with a high quality of the MCM-41 phase. Hierarchical materials with a flexible ratio between the volumes of the micro- and mesopores could be prepared via the second route. Even pure MCM-41 extrudates were synthesized on the basis of the starting zeolite. The samples were characterized by nitrogen physisorption, X-ray diffraction (XRD), inductively coupled plasma optical emission spectrometry (ICP-OES), transmission electron microscopy (TEM) and break resistance measurements. The DAY cylinders remained intact after a complete transformation of the zeolite phase. (C) 2013 Elsevier B.V. All rights reserved.