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Synthesis of SAPO-34 templated by diethylamine: Crystallization process and Si distribution in the crystals
Liu, Guangyu1,2; Tian, Peng1; Zhang, Ying1,2; Li, Jinzhe1,2; Xu, Lei1; Meng, Shuanghe1; Liu, Zhongmin1; Liu ZM(刘中民); Liu ZM(刘中民)
KeywordSapo-34 Diethylamine Characterization Crystallization Mechanism Si Distribution
Source PublicationMICROPOROUS AND MESOPOROUS MATERIALS
2008-09-01
DOI10.1016/j.micromeso.2008.01.030
Volume114Issue:1-3Pages:416-423
Indexed BySCI
SubtypeArticle
Department8
Funding Project803
Contribution Rank1;1
WOS HeadingsScience & Technology ; Physical Sciences ; Technology
WOS SubjectChemistry, Applied ; Chemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary
WOS Research AreaChemistry ; Science & Technology - Other Topics ; Materials Science
WOS KeywordMETHANOL-TO-HYDROCARBONS ; MOLECULAR-SIEVES ; SILICON INCORPORATION ; OLEFIN CONVERSION ; LIGHT OLEFINS ; NMR ; MECHANISMS ; MORPHOLINE ; STABILITY ; ZEOLITES
AbstractThe crystallization process of SAPO-34 molecular sieve with Si distribution in the crystals using diethylamine (DEA) as the template was investigated by XRD, SEM, IR, NMR, XRF, XPS and EDS techniques. It was found that the solution-mediated transport mechanism occurred during the crystallization, though the gel transformation cannot be completely excluded in the initial crystallization (t <= 1 h). Si directly participated in the crystallization in the initial stage and incorporated into the framework of SAPO-34 by SM2 (P substitution by Si) and SM3 (pairs of Al and P substitution by 2Si) mechanisms. XPS analysis revealed the enrichment of Si on the surface of crystals. Based on the experimental results, a model of Si distribution in the crystals was proposed, which described a non-uniform distribution of Si in the crystals, with the increasing content from the core to the surface. (C) 2008 Elsevier Inc. All rights reserved.
Language英语
URL查看原文
WOS IDWOS:000258432100042
Citation statistics
Cited Times:85[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://cas-ir.dicp.ac.cn/handle/321008/100631
Collection中国科学院大连化学物理研究所
Corresponding AuthorLiu ZM(刘中民); Liu ZM(刘中民)
Affiliation1.Chinese Acad Sci, Dalian Inst Chem Phys, Lab Appl Catalysis, Dalian 116023, Peoples R China
2.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Liu, Guangyu,Tian, Peng,Zhang, Ying,et al. Synthesis of SAPO-34 templated by diethylamine: Crystallization process and Si distribution in the crystals[J]. MICROPOROUS AND MESOPOROUS MATERIALS,2008,114(1-3):416-423.
APA Liu, Guangyu.,Tian, Peng.,Zhang, Ying.,Li, Jinzhe.,Xu, Lei.,...&刘中民.(2008).Synthesis of SAPO-34 templated by diethylamine: Crystallization process and Si distribution in the crystals.MICROPOROUS AND MESOPOROUS MATERIALS,114(1-3),416-423.
MLA Liu, Guangyu,et al."Synthesis of SAPO-34 templated by diethylamine: Crystallization process and Si distribution in the crystals".MICROPOROUS AND MESOPOROUS MATERIALS 114.1-3(2008):416-423.
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