Solvent-free synthesis of SAPO-34 nanocrystals with reduced template consumption for methanol-to-olefins process

doi:10.1016/j.apcata.2016.11.005

	Solvent-free synthesis of SAPO-34 nanocrystals with reduced template consumption for methanol-to-olefins process
	Li, Meng 1; Wang, Yihui1,2 ; Bai, Lu 1,3; Chang, Na 1,3; Nan, Guizhen1,2 ; Hu, Deng 1; Zhang, Yanfeng1,2 ; Wei, Wei1,2
	2017-02-05
发表期刊	APPLIED CATALYSIS A-GENERAL (IF:4.7[JCR-2023],4.8[5-Year])
ISSN	0926-860X
卷号	531 页码:203-211
发表状态	已发表
DOI	10.1016/j.apcata.2016.11.005
摘要	SAPO-34 nanocrystals were synthesized by solvent-free method with significantly reduced template consumption. The obtained SAPO-34 samples were characterized by XRD, SEM, nitrogen adsorption, NMR, NH3-TPD, XPS and XRF. The combination of various Si and Al sources had big impact on the physical-chemical properties of the obtained SAPO-34 crystals, including crystal size, surface area and pore volume, acid strength and distribution and Si environment in the zeolite framework. The nano-sized SAPO-34 crystals exhibited excellent performance in MTO reaction with comparable selectivities to light olefins(combined 80% ethylene and propylene selectivity with 50:50 split) and substantially extended catalytic lifetime (from 200 min to 840 min), compared with micron-sized SAPO-34 catalyst synthesized by conventional hydrothermal method. The extended lifetime could be attributed to the presence of abundant mesopores generated by the stacking of nanocrystals, which alleviated the diffusion constrain and allowed more coke deposition. The unique acid strength and distribution as well as Si environment of the SAPO-34 samples may also contribute to long catalytic lifetime. The solvent-free synthesis method provides a cheap and sustainable way of preparing excellent MTO catalyst with significantly reduced template consumption&waste water emission and improved autoclave efficiency. (C) 2016 Elsevier B.V. All rights reserved.
关键词	Zeolite synthesis SAPO-34 Solvent-free Template Methanol-to-olefins
收录类别	SCI ; EI
语种	英语
资助项目	SARI[Y426473231]
WOS研究方向	Chemistry ; Environmental Sciences & Ecology
WOS类目	Chemistry, Physical ; Environmental Sciences
WOS记录号	WOS:000392680500023
出版者	ELSEVIER SCIENCE BV
WOS关键词	NANOSIZED SAPO-34 ; HYDROTHERMAL SYNTHESIS ; DIRECTED SYNTHESIS ; MOLECULAR-SIEVES ; MTO ; CONVERSION ; ZEOLITES ; SIZE ; DEACTIVATION ; SELECTIVITY
原始文献类型	Article
引用统计	正在获取...
文献类型	期刊论文
条目标识符	https://kms.shanghaitech.edu.cn/handle/2MSLDSTB/1509
专题	物质科学与技术学院物质科学与技术学院_特聘教授组_魏伟组物质科学与技术学院_特聘教授组_张延风组物质科学与技术学院_硕士生
通讯作者	Zhang, Yanfeng; Wei, Wei
作者单位	1.Chinese Acad Sci, Shanghai Adv Res Inst, CAS Key Lab Low Carbon Convers Sci & Engn, Shanghai 201210, Peoples R China 2.ShanghaiTech Univ, Sch Phys Sci & Technol, Shanghai 201210, Peoples R China 3.Shanghai Univ, Sch Mat Sci, 99 Shangda Rd, Shanghai 200444, Peoples R China
通讯作者单位	物质科学与技术学院
推荐引用方式 GB/T 7714	Li, Meng,Wang, Yihui,Bai, Lu,et al. Solvent-free synthesis of SAPO-34 nanocrystals with reduced template consumption for methanol-to-olefins process[J]. APPLIED CATALYSIS A-GENERAL,2017,531:203-211.
APA	Li, Meng.,Wang, Yihui.,Bai, Lu.,Chang, Na.,Nan, Guizhen.,...&Wei, Wei.(2017).Solvent-free synthesis of SAPO-34 nanocrystals with reduced template consumption for methanol-to-olefins process.APPLIED CATALYSIS A-GENERAL,531,203-211.
MLA	Li, Meng,et al."Solvent-free synthesis of SAPO-34 nanocrystals with reduced template consumption for methanol-to-olefins process".APPLIED CATALYSIS A-GENERAL 531(2017):203-211.