Hollow ZSM-5 Zeolite Microspheres with Improved Adsorption and Catalytic Properties
Hollow ZSM-5 Zeolite Microspheres with Improved Adsorption and Catalytic Properties
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具有改进吸附和催化性能的中空 ZSM-5 沸石微球
DOI：
10.15541/jim20150611
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发表时间：
2016
影响因子：
1.7
通讯作者：
Zhou Jian
中科院分区：
文献类型：
--
作者：
Sun Li-Li;Yan Kai;Luo Wen;Zhou Jian
以聚乙二醇（PEG）为软模板剂，采用常规的水热法合成沸石微球，然后采用快速后碱刻蚀（PAE）技术，采用非硬模板法成功地合成了一种新型的均匀空心沸石微球。采用XRD、N2等温线、SEM、TEM等手段对样品的结构进行了表征。考察了该催化剂在有机废水处理和大分子催化裂解中的性能。结果表明，碱蚀处理后，产物的结晶度有降低的趋势，但介孔率和孔容有所提高。中空分子筛微球外径在600 nm, 壳层厚度在100 nm左右。此外，这种中空结构表明，如果与常规沸石球相比，在甲醇溶液中吸附苯分子的能力显著提高了三倍。重复吸附6次后，基本保持了吸附性能，表明该吸附剂具有较高的吸附性能和稳定性。在异丙苯和三异丙苯的裂解反应中，催化剂的活性也得到了提高。
: A new kind of uniform hollow zeolite spheres were successfully synthesized by non-hard template synthetic method, which involves two key steps: firstly, the conventional hydrothermal synthesis process of zeolite spheres by using polyethylene glycol (PEG) as soft template, and then, the rapid post-alkaline-etching (PAE) technique. Structural features were characterized by XRD, N 2 isotherm, SEM, and TEM. The performance in the or-ganic-waste-water treatment and catalytic cracking of bulky molecules were also measured. It was found that crystal-linity of the product underwent a reducing tendency after alkaline etching treatment, but the mesoporosity and pore volume were promoted. The diameter and shell thickness of hollow zeolite spheres were about 600 nm and 100 nm, respectively. Moreover, such hollow structure demonstrates remarkably a threefold capability increase in adsorption of benzene molecules in methanol solution if compared with conventional zeolite spheres. Such capability can be basi-cally kept after repeating 6 times, indicating high capability and stability in adsorption. Enhanced catalytic activities were also approved in cracking of isopropyl benzene and triisopropyl benzene.
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影响因子：
11.4
作者：
Dai You-zhi
通讯作者：
Dai You-zhi
影响因子：
8.6
作者：
Dai, Chengyi;Zhang, Anfeng;Guo, Xinwen
通讯作者：
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影响因子：
15
作者：
Groen, JC;Bach, T;Pérez-Ramírez, J
通讯作者：
Pérez-Ramírez, J
影响因子：
1.7
作者：
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通讯作者：
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影响因子：
4
作者：
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