Hierarchical TS-1 synthesized via the dissolution-recrystallization process: Influence of ammonium salts

被引：37

作者：

Wang, Baorong ^{[1
]}

Peng, Xinxin ^{[2
]}

Zhang, Wenfeng ^{[1
]}

Lin, Min ^{[2
]}

Zhu, Bin ^{[2
]}

Liao, Weilin ^{[1
]}

Guo, Xiaohong ^{[1
]}

Shu, Xingtian ^{[2
]}

机构：

[1] Jiangxi Normal Univ, Natl Engn Res Ctr Carbonhydrate Synth, Nanchang 330027, Jiangxi, Peoples R China

[2] SINOPEC, Res Inst Petr Proc, State Key Lab Catalyt Mat & React Engn, Beijing 100083, Peoples R China

来源：

CATALYSIS COMMUNICATIONS | 2017年 / 101卷

关键词：

Hierarchical TS-1; Ammonium salts; Dissolution-recrystallization; CATALYTIC-PROPERTIES; HYDROGEN-PEROXIDE; CYCLOHEXANONE AMMOXIMATION; MESOPOROUS MATERIALS; TITANIUM-SILICALITE; ALLYL ALCOHOL; ACTIVE-SITES; EPOXIDATION; ZEOLITE; SELECTIVITY;

D O I：

10.1016/j.catcom.2017.07.016

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

TS-1 was post-modified by ammonium salts or tetrapropylammonium hydroxide (TPAOH). During the ammonium salts modification, the crystals were eroded and extra-framework titanium species were formed. After the combined-modification, hierarchical TS-1 with secondary pore volume in the 0.22-0.28 cm(3)/g range was obtained via the intensified dissolution-recrystallization process, although more extra-framework titanium species were generated as five-/six-coordinated species. In cyclohexene oxidation with tert-butyl hydroperoxide (TBHP) as the oxidant, the activity of modified TS-1 decreased when anatase was formed only. However, it increased in the presence of five-/six-coordinated titanium. The secondary porosity further improved the catalytic performance and the activity of the combined-modified TS-1 samples increased remarkably by > 100%.

引用

页码：26 / 30

页数：5

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