Synthesis of small-sized ZSM-5 zeolites employing mixed structure directing agents

被引：28

作者：

Chauhan, N. L. ^{[2
]}

Das, J. ^{[1
]}

Jasra, R. V. ^{[1
]}

Parikh, P. A. ^{[2
]}

Murthy, Z. V. P. ^{[2
]}

机构：

[1] Reliance Ind Ltd, Reliance Technol Grp, Vadodara Mfg Div, Vadodara 391346, Gujarat, India

[2] SV Natl Inst Technol, Dept Chem Engn, Surat 395007, India

来源：

MATERIALS LETTERS | 2012年 / 74卷

关键词：

Zeolite; ZSM-5; Mixed templates agent; Crystal size; Morphology; CRYSTAL SIZE; TEMPLATES;

D O I：

10.1016/j.matlet.2012.01.094

中图分类号：

T [工业技术];

学科分类号：

120111 [工业工程];

摘要：

Nano-sized crystals of zeolite ZSM-5 were hydrothermally synthesized using a mixture of two templating agents, tri-ethyl butyl ammonium bromide (TEBA) and ethylene diamine (EDA). Synthesized samples were characterized by XRD. SEM and ammonia TPD. Influences of proportions of the templating agents, silica to alumina ratio (SAR) and crystallization period were have been studied. Crystal morphology and size of the synthesized samples varied with proportions templating agents and SAR. Crystal size in the range of 100-400 nm was observed with equimolar templates for an SAR of 200. Crystal size increased to 1 to similar to 3 mu m with SAR in the range of 400-1200. Crystallization of MFI zeolite in presence of mixed templates was found to pass through an unknown meta-stable intermediate. (C) 2012 Elsevier B.V. All rights reserved.

引用

页码：115 / 117

页数：3

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