The High-Performance Hollow Silicalite-1@Titanium Silicalite-1 Core-Shell Catalyst for Propene Epoxidation

被引：8
|
作者：
Wang, Yanli [1 ]
Zuo, Yi [1 ]
Liu, Min [1 ]
Dai, Chengyi [1 ]
Feng, Zhaochi [2 ]
Guo, Xinwen [1 ]
机构：
[1] Dalian Univ Technol, Sch Chem Engn, State Key Lab Fine Chem, PSU DUT Joint Ctr Energy Res, 2 Linggong Rd, Dalian 116024, Peoples R China
[2] Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, 457 Zhongshan Rd, Dalian 116023, Peoples R China
来源：
CHEMISTRYSELECT | 2017年 / 2卷 / 31期
基金：
中国国家自然科学基金;
关键词：
Core-shell structure; Hollow titanium silicalite-1; Hydrothermal method; Pure framework titanium; Silicalite-1; LOW-COST SYNTHESIS; TS-1; ZEOLITE; TETRAPROPYLAMMONIUM BROMIDE; TITANIUM SILICALITE-1; EPITAXIAL-GROWTH; TANDEM CATALYST; TITANOSILICATE; RECRYSTALLIZATION; COMPOSITES; SEEDS;
D O I：
10.1002/slct.201701753
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
Hollow silicalite-1@titanium silicalite-1 (H-S-1@TS-1) core-shell catalyst was synthesized in hydrothermal system with hollow silicalite-1 serving as core. In this novel method, tetrapropylammonium hydroxide (TPAOH) served as the single template in the whole synthesis process so as to avoid secondary structure directing agents (SDAs) that traditional methods applied to give core-shell TS-1. Since inner hollow structure was given by S-1,H-S-1@TS-1 avoided framework Ti leaching in coventional dissolution-recrystallization process that gave hollow TS-1 and thus it was in absence of extra-framework Ti. H-S-1@TS-1 showed better propene epoxidation activity (TOF = 13.61 mol (mol h)(-1) than microporous TS-1 (TOF= 8.08 mol (mol h)(-)) and micro-TS-1 post-treated with TPAOH solution (TOF= 9.75 mol (mol h)(-1)the synergy function of pure framework Ti species, higher surface Ti content and enhanced diffusion property.
引用
收藏
页码：10097 / 10100
页数：4
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