Seed-assisted grinding synthesis of SAPO-34 catalyst and its prolonged catalytic lifetime in the conversion of methanol to olefins
Lu, Huihui; Duan, Weiting; Zhao, Xinhong
2019-12
Source PublicationREACTION KINETICS MECHANISMS AND CATALYSIS
ISSN1878-5190
Volume128Issue:2Pages:1029-1042
AbstractA cost-effective route has been developed for the synthesis of nano-sized triclinic SAPO-34 zeolite via seed-assisted grinding method using lower dosage of morpholine as the sole template. The synthesis conditions including silica source, silica concentration, crystallization temperature and time were refined to obtain SAPO-34 zeolite with high phase purity and crystallinity. Particularly, seed crystals preactivated by different methods were utilized to induce the synthesis of nano-sized SAPO-34 zeolites in the subsequent study. The resultant SAPO-34 samples were characterized by XRD, SEM, N-2 physisorption and NH3-TPD techniques. It was found that the introduction of seed crystals activated by mechanical milling for 20 min and chemical etching with 0.0001 M and 0.01 M H3PO4 can not only effectively reduce the crystal size of SAPO-34 zeolites from 3-4 mu m to 500-800 nm level, but also can modify their texture and acid properties. This nano-sized SAPO-34 catalyst exhibits a remarkably prolonged catalytic lifetime in methanol to olefins (MTO) reaction in comparison to the conventional micron-sized counterpart. Analogous to solvent-free synthesis of zeolites, this seed-assisted grinding synthesis method is simpler, more efficient than conventional hydrothermal synthesis. More importantly, this method provides a new avenue for preparing superior MTO catalyst.
KeywordZeolite synthesis Activated seeds Triclinic SAPO-34 Methanol to olefins reaction
DOI10.1007/s11144-019-01655-0
Indexed BySCI
Language英语
WOS Research AreaChemistry
WOS SubjectChemistry, Physical
WOS IDWOS:000496310300027
PublisherSPRINGER
Citation statistics
Cited Times:3[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.lut.edu.cn/handle/2XXMBERH/64266
Collection石油化工学院
Corresponding AuthorZhao, Xinhong
AffiliationLanzhou Univ Technol, Sch Petrochem Engn, Lanzhou 730050, Gansu, Peoples R China
First Author AffilicationLanzhou University of Technology
Corresponding Author AffilicationLanzhou University of Technology
First Signature AffilicationLanzhou University of Technology
Recommended Citation
GB/T 7714
Lu, Huihui,Duan, Weiting,Zhao, Xinhong. Seed-assisted grinding synthesis of SAPO-34 catalyst and its prolonged catalytic lifetime in the conversion of methanol to olefins[J]. REACTION KINETICS MECHANISMS AND CATALYSIS,2019,128(2):1029-1042.
APA Lu, Huihui,Duan, Weiting,&Zhao, Xinhong.(2019).Seed-assisted grinding synthesis of SAPO-34 catalyst and its prolonged catalytic lifetime in the conversion of methanol to olefins.REACTION KINETICS MECHANISMS AND CATALYSIS,128(2),1029-1042.
MLA Lu, Huihui,et al."Seed-assisted grinding synthesis of SAPO-34 catalyst and its prolonged catalytic lifetime in the conversion of methanol to olefins".REACTION KINETICS MECHANISMS AND CATALYSIS 128.2(2019):1029-1042.
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