Insights into the aminothermal crystallization process of SAPO-34 and its comparison with hydrothermal system

doi:10.1016/j.micromeso.2017.04.035

	Insights into the aminothermal crystallization process of SAPO-34 and its comparison with hydrothermal system
	Gao, Beibei 1,2; Fan, Dong 1,2; Sun, Lijing 1,2; An, Hongyu 3; Fan, Fengtao 3; Xu, Shutao 2; Tian, Peng 2; Liu, Zhongmin 2
刊名	MICROPOROUS AND MESOPOROUS MATERIALS
	2017-08-01
卷号	248 页码:204-213
关键词	Molecular Sieves Sapo-34 Crystallization Aminothermal Synthesis Characterization
DOI	10.1016/j.micromeso.2017.04.035
英文摘要	Aminothermal synthesis reported by our group recently, in which organic amine is used as the solvent and template, could obviously enhance the solid yield and crystallization rate of SAPO-34 as compared with the corresponding hydrothermal one. Herein, aminothermal crystallization process of SAPO-34 is investigated to gain insights into this novel synthetic method by XRD, SEM, IR, UV-Raman and various solid-state NMR techniques. It is found that aminothermal environment facilitates the fast formation of a semicrystalline AIPO layered phase, which further promotes the quick activation of Al source. The lamellar phase, which is water-soluble and contains double 6-rings in the framework, could be stabilized by protonated triethylamine (TEA(+)). SAPO-34 nucleates from the rearrangement of the double 6-rings in the layered phase through bond breaking, reforming and Si incorporation after heating at 160 degrees C for 3 h. For the hydrothermal process, the interaction between TEA(+) and inorganic species is weak and the formation of layered phase is retarded due to its high solubility in water. Correspondingly, the activation of Al source is slow and SAPO-34 appears after 24 h. This work demonstrates the importance of water concentration in the synthetic system, which may influence the formation of intermediate species and alter the crystallization process and rate. (C) 2017 Elsevier Inc. All rights reserved.
语种	英语
WOS记录号	WOS:000402497200024
内容类型	期刊论文
源URL	[http://cas-ir.dicp.ac.cn/handle/321008/152200]
专题	大连化学物理研究所_中国科学院大连化学物理研究所
作者单位	1.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 2.Chinese Acad Sci, Dalian Inst Chem Phys, iChEM Collaborat Innovat Ctr Chem Energy Mat, Natl Engn Lab Methanol Olefins,Dalian Natl Lab Cl, Dalian 116023, Peoples R China 3.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China
推荐引用方式 GB/T 7714	Gao, Beibei,Fan, Dong,Sun, Lijing,et al. Insights into the aminothermal crystallization process of SAPO-34 and its comparison with hydrothermal system[J]. MICROPOROUS AND MESOPOROUS MATERIALS,2017,248:204-213.
APA	Gao, Beibei.,Fan, Dong.,Sun, Lijing.,An, Hongyu.,Fan, Fengtao.,...&Liu, Zhongmin.(2017).Insights into the aminothermal crystallization process of SAPO-34 and its comparison with hydrothermal system.MICROPOROUS AND MESOPOROUS MATERIALS,248,204-213.
MLA	Gao, Beibei,et al."Insights into the aminothermal crystallization process of SAPO-34 and its comparison with hydrothermal system".MICROPOROUS AND MESOPOROUS MATERIALS 248(2017):204-213.