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学科主题: 物理化学
题名: Preparation of hierarchical mordenite zeolites by sequential steaming-acid leaching-alkaline treatment
作者: Huang, Shengjun1;  Liu, Xiaohan1, 2;  Yu, Lili1, 2;  Miao, Shu1;  Liu, Zhenni1;  Zhang, Shuang1;  Xie, Sujuan1;  Xu, Longya1
通讯作者: 黄声骏 ;  徐龙伢
关键词: Aluminum-rich mordenite ;  Hierarchical zeolite ;  Sequential treatment ;  Steaming temperature
刊名: MICROPOROUS AND MESOPOROUS MATERIALS
发表日期: 2014-06-01
DOI: 10.1016/j.micromeso.2014.02.039
卷: 191, 期:1, 页:18-26
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences ;  Technology
类目[WOS]: Chemistry, Applied ;  Chemistry, Physical ;  Nanoscience & Nanotechnology ;  Materials Science, Multidisciplinary
研究领域[WOS]: Chemistry ;  Science & Technology - Other Topics ;  Materials Science
英文摘要: A three-step method consisting of steaming-acid leaching-alkaline treatment is used to introduce mesoporosity in a commercially available Al-rich mordenite zeolite (Si/Al = 4.8). It has been found that the three-step sequential treatment results in the intra-crystalline mesoporosity with a pore size distribution centered at around 20 nm. Single step or binary combination among steaming, acid leaching (treated in 3.0 M HNO3 solution at 80 degrees C for 1 h) and alkaline treatment (treated in 0.1 M NaOH aqueous solution at 85 degrees C for 2 h) hardly induces the mesoporosity with a controlled mesopore size distribution. Among the involved three steps, the impact of steaming temperature on the mesoporosity development is studied. The elevation of steaming temperature in the range of 300-600 degrees C improves the susceptibility to the successive alkaline treatment and thus enhances the mesoporosity formation. Moreover, transitions of Si-29 NMR spectra demonstrate an extraction-realumination of framework Al species with Si(2Al) configuration during the synthesis of hierarchical mordenite zeolite. (C) 2014 Elsevier Inc. All rights reserved.
关键词[WOS]: MFI ZEOLITES ;  MESOPOROSITY DEVELOPMENT ;  DESILICATION ;  CATALYSTS ;  ALUMINUM ;  DEALUMINATION ;  CRYSTALS ;  ZSM-5 ;  ACCESSIBILITY ;  GENERATION
语种: 英语
WOS记录号: WOS:000335627000003
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/144398
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China
2.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China

Recommended Citation:
Huang, Shengjun,Liu, Xiaohan,Yu, Lili,et al. Preparation of hierarchical mordenite zeolites by sequential steaming-acid leaching-alkaline treatment[J]. MICROPOROUS AND MESOPOROUS MATERIALS,2014,191(1):18-26.
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