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Aminothermal synthesis of CHA-type SAPO molecular sieves and their catalytic performance in methanol to olefins (MTO) reaction
Fan, Dong1,2,3; Tian, Peng1,2; Su, Xiong1,2,3; Yuan, Yangyang1,2,3; Wang, Dehua1,2,3; Wang, Chan1,2,3; Yang, Miao1,2; Wang, Linying1,2; Xu, Shutao1,2; Liu, Zhongmin1,2
Source PublicationJOURNAL OF MATERIALS CHEMISTRY A
2013
DOI10.1039/c3ta12829f
Volume1Issue:45Pages:14206-14213
Indexed BySCI
SubtypeArticle
WOS HeadingsScience & Technology ; Physical Sciences ; Technology
WOS SubjectChemistry, Physical ; Energy & Fuels ; Materials Science, Multidisciplinary
WOS Research AreaChemistry ; Energy & Fuels ; Materials Science
WOS KeywordPRODUCT SELECTIVITY ; SILICON INCORPORATION ; REACTION CENTERS ; SI DISTRIBUTION ; CONVERSION ; TEMPLATE ; HSAPO-34 ; DIETHYLAMINE ; HYDROCARBONS ; MECHANISM
AbstractAminothermal synthesis of SAPO molecular sieves, in which organic amines are used as both solvent and template, is explored based on a variety of amines. Di-iso-propylamine (DIPA) and N,N,N',N'-tetramethylethylenediamine (TMEDA) are found to lead to the rapid crystallization of SAPO-34 with high solid yield. A solid yield of 96.2% could be acquired using the TMEDA system (200 degrees C, 12 h), which is the highest value ever reported for SAPO molecular sieves. SAPO-44 is obtained for the first time using the hexamethyleneimine (HMI) template. Detailed synthetic investigation shows that the silicon content in the initial gel has an important effect on the crystalline nature of the final products, and higher Si concentration favours the synthesis of pure SAPO-34 and SAPO-44. In addition, it is shown that the Si coordination environment in the samples is closely related to the choice of template. Among the three samples investigated, SAPO-34-DIPA has the lowest threshold of Si content for the formation of Si islands in the framework due to the smallest charge compensation centers occluded in its CHA cage. The catalytic performance of the synthesized samples is tested by the MTO reaction and a high olefin selectivity of 85.8% is obtained on SAPO-34 templated by DIPA.
Language英语
WOS IDWOS:000326465100023
Citation statistics
Cited Times:22[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://cas-ir.dicp.ac.cn/handle/321008/137877
Collection中国科学院大连化学物理研究所
Affiliation1.Chinese Acad Sci, Dalian Inst Chem Phys, Dalian Natl Lab Clean Energy, Dalian, Peoples R China
2.Chinese Acad Sci, Dalian Inst Chem Phys, Natl Engn Lab Methanol Olens, Dalian, Peoples R China
3.Univ Chinese Acad Sci, Beijing, Peoples R China
Recommended Citation
GB/T 7714
Fan, Dong,Tian, Peng,Su, Xiong,et al. Aminothermal synthesis of CHA-type SAPO molecular sieves and their catalytic performance in methanol to olefins (MTO) reaction[J]. JOURNAL OF MATERIALS CHEMISTRY A,2013,1(45):14206-14213.
APA Fan, Dong.,Tian, Peng.,Su, Xiong.,Yuan, Yangyang.,Wang, Dehua.,...&Liu, Zhongmin.(2013).Aminothermal synthesis of CHA-type SAPO molecular sieves and their catalytic performance in methanol to olefins (MTO) reaction.JOURNAL OF MATERIALS CHEMISTRY A,1(45),14206-14213.
MLA Fan, Dong,et al."Aminothermal synthesis of CHA-type SAPO molecular sieves and their catalytic performance in methanol to olefins (MTO) reaction".JOURNAL OF MATERIALS CHEMISTRY A 1.45(2013):14206-14213.
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