Preparation and performance of TS-1/SiO2 egg-shell catalysts
Preparation and performance of TS-1/SiO2 egg-shell catalysts
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TS-1/SiO2蛋壳催化剂的制备及性能
DOI：
10.1016/j.cej.2011.08.077
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发表时间：
2011-11
影响因子：
15.1
通讯作者：
Yeung, King Lun
中科院分区：
文献类型：
--
作者：
Wang, Xiaobin;Zhang, Xiongfu;Wang, Yao;Liu, Haiou;Wang, Jinqu;Qiu, Jieshan;Ho, Hung Lai;Han, Wei;Yeung, King Lun
采用有机连接剂和浸涂法相结合的晶种法在SiO2微球表面均匀沉积了单层沸石纳米粒子。通过SEM和XRD表征表明，晶种转化为具有（011）择优取向的TS-1分子筛膜。EDXS、XPS和UV-vis光谱证实了蛋壳型TS-1/SiO2催化剂的成功制备。薄壳催化剂（即，<11μm）对苯乙烯的氧化活性较高。芳香醛的转化反应速率为8.9mmolg−1h− 1，转换频率为28 h − 1（即，苯甲醛和苯乙醛）为主要产物。较大的传质阻力使厚壳催化剂的效率较低，比转化率较低，为6.9mmolg-1h-1，周转频率为25 h-1。此外，由较长合成产生的骨架外钛导致较差的选择性。蛋壳型TS-1/SiO2催化剂具有耐磨损、易于分离和回收等优点。
A monolayer of zeolite nanoparticles was deposited uniformly on SiO2beads’ surface by a new seeding method based on the combined use of organic linker and dip-coating procedure. The seeds were transformed into a well-intergrown TS-1 zeolite film and characterizations by SEM and XRD indicated that the film has a preferred (011) orientation. EDXS, XPS and UV–vis spectroscopies confirmed the successful preparation of egg-shell TS-1/SiO2catalysts. Thin shell catalysts (i.e., <11μm) were more active for styrene oxidation. Conversion reaction rate of 8.9mmolg−1h−1and turnover frequency of 28h−1were obtained with aromatic aldehydes (i.e., benzaldehyde and phenyl acetaldehyde) being the main products. Greater mass transfer resistance made thick shell catalysts less efficient with lower specific conversion rate of 6.9mmolg−1h−1and turnover frequency of 25h−1. Also, the extra-framework titanium resulting from the longer synthesis led to poorer selectivity. Egg-shell TS-1/SiO2catalyst beads were shown to be resistant to attrition and were easier to separate and recover from reaction.
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影响因子：
9.5
作者：
L. Au;K. Yeung
通讯作者：
L. Au;K. Yeung
TS-1涂层规整填料在苯乙烯氧化反应中的性能
影响因子：
12.9
作者：
Wang, Xiaobin;Zhang, Xiongfu;Wang, Yao;Liu, Haiou;Qiu, Jieshan;Wang, Jinqu;Han, Wei;Yeung, King Lun
通讯作者：
Yeung, King Lun
影响因子：
9.5
作者：
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通讯作者：
W. C. Wong;L. Y. Au;P. S. Lau;Carlos Téllez Ariso;K. Yeung
影响因子：
7.3
作者：
Y. Wan;J. Chau;K. Yeung;A. Gavriilidis
通讯作者：
Y. Wan;J. Chau;K. Yeung;A. Gavriilidis
影响因子：
7.3
作者：
S. Laha;R. Kumar
通讯作者：
S. Laha;R. Kumar