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论文类型：期刊论文

发表时间：2015-04-01

发表刊物：MICROPOROUS AND MESOPOROUS MATERIALS

卷号：206

期号：C

页面范围：52-57

ISSN号：1387-1811

关键字：Silicate; Zeolite; Conversion; Medium-range structure

摘要：Mordenite was synthesized from diatomite in a template-free system. The crystallization behavior and changes of medium-range structure during the crystallization were studied by X-ray diffraction, scanning electron micrograph, vibrational spectroscopy and high-energy X-ray diffraction. It is indicated that major 4-membered rings are formed at a stage later than that of 5-membered ring in the course of crystallization. Diatomite has also been demonstrated to consist of 5-membered rings and various rings lager than 5-membered ring. A formation pathway for mordenite from diatomite could be proposed that 5-membered rings formed initially are undergoing accommodation of 4-membered rings around them to form mordenite. (C) 2014 Elsevier Inc. All rights reserved.