Fe-SBA-16介孔分子筛的制备及其催化苯酚羟基化反应性能

doi:10.16085/j.issn.1000-6613.2016.s2.032

化工进展 ›› 2016, Vol. 35 ›› Issue (S2): 187-191.DOI: 10.16085/j.issn.1000-6613.2016.s2.032

Fe-SBA-16介孔分子筛的制备及其催化苯酚羟基化反应性能

赵玉梅

山西轻工职业技术学院, 山西太原 030013

收稿日期:2016-04-21 修回日期:2016-08-02 出版日期:2016-12-31 发布日期:2016-12-22
作者简介:赵玉梅(1986-),女,硕士,助教,研究方向为介孔分子筛。E-mail:zhaoym3899@126.com。

Preparation and catalytic performance for phenol hydroxylation of Fe-SBA-16 mesoporous molecular sieves

ZHAO Yumei

Shanxi Light Industry Professional Technology Institute, Taiyuan 030013, Shanxi, China

Received:2016-04-21 Revised:2016-08-02 Online:2016-12-31 Published:2016-12-22

摘要/Abstract

摘要： 以正硅酸乙酯为硅源，F127为模板剂，采用水热合成法直接合成不同铁含量的Fe-SBA-16分子筛。通过X射线衍射、N₂物理吸附-脱附、红外光谱、紫外-可见漫反射光谱等分析手段对催化剂的结构进行表征。研究了Fe-SBA-16在以H₂O为溶剂，H₂O₂为氧化剂的苯酚羟基化反应中的催化活性并考察了不同的反应条件（Fe含量、反应温度、反应时间、催化剂用量、反应物配比）对催化性能的影响。结果表明，在一定铁含量的条件下合成出的Fe-SBA-16样品均保持了SBA-16介孔分子筛的立方笼状介孔结构和高的比表面积，且Fe被成功地引入到SBA-16骨架上。当Si/Fe=30时，Fe-SBA-16催化剂表现出良好的催化活性和选择性。反应温度为65℃，反应时间为2h，苯酚：双氧水为1：0.4时催化活性最好，苯酚的转化率为30.8%，邻苯二酚与对苯二酚的选择性分别为64.3%与30.5%。

关键词: Fe-SBA-16, 分子筛, 催化, 苯酚羟基化

Abstract: Fe-SBA-16 with different Fe were prepared under direct hydrothermal crystallization using tetraethyl orthosilicate as silica source,and the F127 as template.The structure was characterized with XRD,N₂ adsorption-desorption,FTIR and UV-vis.The catalytic activities of Fe-SBA-16 for phenol hydroxylation was investigated using H₂O as solvent and H₂O₂ as oxidant.The effects of the various reaction conditions including temperature,time,molar ratio of reactants and the amount of the catalyst on the yield of catechol and hydroquinone were studied. The results showed that all samples maintain the cubic cage-1ike structure of mesoporous SBA-16 with a cubic symmetry,pore structure,high surface area.The Fe was successfully incorporated into the framework of SBA-16.Fe-SBA-16 with Si/Fe=30 showed excellent has higher activity and selectivity in phenol hydroxylation.The conversion of phenol was 30.8% at 65℃ for 2h and n(Phenol)/n(H₂O₂)=1:0.4.The selectivity to catechol and hydroquinone reached 64.3% and 30.5% respectively.

Key words: Fe-SBA-16, molecular sieves, catalysis, phenol hydroxylation

中图分类号:

赵玉梅. Fe-SBA-16介孔分子筛的制备及其催化苯酚羟基化反应性能[J]. 化工进展, 2016, 35(S2): 187-191.

ZHAO Yumei. Preparation and catalytic performance for phenol hydroxylation of Fe-SBA-16 mesoporous molecular sieves[J]. Chemical Industry and Engineering Progree, 2016, 35(S2): 187-191.

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Fe-SBA-16介孔分子筛的制备及其催化苯酚羟基化反应性能

Preparation and catalytic performance for phenol hydroxylation of Fe-SBA-16 mesoporous molecular sieves

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