Seed-Assisted Synthesis and Catalytic Performance of Nano-sized ZSM-5 Aggregates in a One-Step Crystallization Process

被引：6

作者：

Wang, Ziyang ^{[1
,2
]}

Wang, Yaquan ^{[1
,2
]}

Sun, Chao ^{[1
,2
]}

Zhao, Aijuan ^{[1
,2
]}

Wang, Cui ^{[1
,2
]}

Zhang, Xu ^{[1
,2
]}

Zhao, Jingjing ^{[1
,2
]}

Zhao, Taotao ^{[1
,2
]}

Liu, Wenrong ^{[1
,2
]}

Lu, Jiaxin ^{[1
,2
]}

Wu, Shuhui ^{[1
,2
]}

机构：

[1] Minist Educ, Key Lab Green Chem Technol, Tianjin 300072, Peoples R China

[2] Tianjin Univ, Sch Chem Engn & Technol, Tianjin 300072, Peoples R China

来源：

TRANSACTIONS OF TIANJIN UNIVERSITY | 2020年 / 26卷 / 04期

基金：

中国国家自然科学基金;

关键词：

Hierarchical ZSM-5; Nano-sized aggregates; Seed-assisted; CTAB; Toluene alkylation with methanol; HIERARCHICAL ZSM-5; TOLUENE ALKYLATION; BENZENE ALKYLATION; CRYSTAL SIZE; METHANOL; ZEOLITE; HZSM-5; CETYLTRIMETHYLAMMONIUM; METHYLATION; SELECTIVITY;

D O I：

10.1007/s12209-019-00223-w

中图分类号：

TE [石油、天然气工业]; TK [能源与动力工程];

学科分类号：

0807 ; 0820 ;

摘要：

Hierarchical nano-sized ZSM-5 aggregates were successfully synthesized via a seed-assisted method in the presence of cetyltrimethylammonium bromide (CTAB) through a facile one-step crystallization process. Commercial ZSM-5 zeolites with a SiO2/Al2O3 ratio comparable to that of ZSM-5 products were treated with alkali and used as the seed particles. The influences of crystallization conditions were investigated, and the possible synthesis mechanism was proposed. ZSM-5 zeolites with different amounts of CTAB added were characterized using many techniques and evaluated in toluene alkylation with methanol. The results showed that a trace amount of CTAB significantly promoted the crystallization of ZSM-5 zeolite, with the morphology changing from hexagonal-shape crystals to uniform spherical aggregates. CTAB may act as the structure-directing agent and assemble the primary crystallites to generate hierarchical ZSM-5 aggregates. The ZSM-5 zeolite with the smallest primary particles of 50-80 nm exhibited large specific surface area, abundant mesopores, and the greatest microporosity. The hierarchical nano-sized ZSM-5 aggregate showed higher toluene conversion and a longer lifetime without compromising the selectivity to xylene and p-xylene in toluene alkylation with methanol.

引用

页码：292 / 304

页数：13

共 59 条

[11] Stable single-unit-cell nanosheets of zeolite MFI as active and long-lived catalysts [J].

Choi, Minkee ;

Na, Kyungsu ;

Kim, Jeongnam ;

Sakamoto, Yasuhiro ;

Terasaki, Osamu ;

Ryoo, Ryong .

NATURE, 2009, 461 (7261) :246-U120

[12] Catalytic benzene alkylation over mesoporous zeolite single crystals: Improving activity and selectivity with a new family of porous materials [J].

Christensen, CH ;

Johannsen, K ;

Schmidt, I ;

Christensen, CH .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2003, 125 (44) :13370-13371

[13] DETERMINATION OF INTEGRATED MOLAR EXTINCTION COEFFICIENTS FOR INFRARED-ABSORPTION BANDS OF PYRIDINE ADSORBED ON SOLID ACID CATALYSTS [J].

EMEIS, CA .

JOURNAL OF CATALYSIS, 1993, 141 (02) :347-354

[14] Seed-induced synthesis of multilamellar ZSM-5 nanosheets directed by amphiphilic organosilane [J].

Fan, Chunyang ;

Wang, Yaquan ;

Li, Hongyao ;

Wang, Xiao ;

Sun, Chao ;

Zhang, Xu ;

Wang, Cui ;

Wang, Shuhai .

NEW JOURNAL OF CHEMISTRY, 2018, 42 (20) :17043-17055

[15] Epitaxial Growth of ZSM-5@Silicalite-1: A Core-Shell Zeolite Designed with Passivated Surface Acidity [J].

Ghorbanpour, Arian ;

Gumidyala, Abhishek ;

Grabow, Lars C. ;

Crossley, Steven P. ;

Rimer, Jeffrey D. .

ACS NANO, 2015, 9 (04) :4006-4016

[16] Seed-induced synthesis of ZSM-5 aggregates using the Silicate-1 as a seed: Characterization and effect of the Silicate-1 composition [J].

Hamidzadeh, Marzieh ;

Komeili, Samane ;

Saeidi, Mohsen .

MICROPOROUS AND MESOPOROUS MATERIALS, 2018, 268 :153-161

[17] Catalysis with hierarchical zeolites [J].

Holm, Martin Spangsberg ;

Taarning, Esben ;

Egeblad, Kresten ;

Christensen, Claus Hviid .

CATALYSIS TODAY, 2011, 168 (01) :3-16

[18] The effect of Si/Al ratio on the catalytic performance of hierarchical porous ZSM-5 for catalyzing benzene alkylation with methanol [J].

Hu, Hualei ;

Lyu, Jinghui ;

Rui, Jiayao ;

Cen, Jie ;

Zhang, Qunfeng ;

Wang, Qingtao ;

Han, Wenwen ;

Li, Xiaonian .

CATALYSIS SCIENCE & TECHNOLOGY, 2016, 6 (08) :2647-2652

[19] Synthesis of hierarchical ZSM-5 by cetyltrimethylammonium bromide assisted self-assembly of zeolite seeds and its catalytic performances [J].

Jin, Lijun ;

Liu, Sibao ;

Xie, Tong ;

Wang, Yatao ;

Guo, Xuehua ;

Hu, Haoquan .

REACTION KINETICS MECHANISMS AND CATALYSIS, 2014, 113 (02) :575-584

[20] MFI zeolite nanosponges possessing uniform mesopores generated by bulk crystal seeding in the hierarchical surfactant-directed synthesis [J].

Jo, Changbum ;

Cho, Kanghee ;

Kim, Jaeheon ;

Ryoo, Ryong .

CHEMICAL COMMUNICATIONS, 2014, 50 (32) :4175-4177

← 1 2 3 4 5 6 →