Grinding synthesis of SAPO-18 zeolite by a single/dual-template route: which is the best catalyst of methanol-to-olefins reaction?

doi:10.1007/s11144-022-02295-7

CORC > 兰州理工大学 > 兰州理工大学 > 石油化工学院

	Grinding synthesis of SAPO-18 zeolite by a single/dual-template route: which is the best catalyst of methanol-to-olefins reaction?
	Niu, Li; Li, Yanru; Long, Xuefeng; Ji, Dong; Wang, Dongliang; Li, Hongwei; Zhao, Xinhong
刊名	REACTION KINETICS MECHANISMS AND CATALYSIS
	2022-09-01
关键词	Grinding synthesis SAPO-18 Dual templates Methanol-to-olefins Light olefins
ISSN号	1878-5190
DOI	10.1007/s11144-022-02295-7
英文摘要	In this study, different templates (DIEA: N,N-diisopropylethylamine; TEAOH: tetraethylammonium hydroxide; DEA: diethylamine) were selected to conduct the grinding synthesis of SAPO-18 molecular sieves. The physicochemical properties of the synthesized SAPO-18 samples were thoroughly analyzed by XRD, CHN elemental measurements, TG, C-13 NMR, SEM, EDS, N-2 adsorption/desorption, and NH3-TPD experiments. The results show that SAPO-18 molecular sieves with better phase purity are synthesized only at the molar ratios of DIEA/TEAOH = 0.5/0.5 and DIEA/DEA = 0.9/0.1 for the dual template systems. The C-13 NMR measurement indicates that the actual template is TEAOH for the sample SP18-DIEA(0.5)TEAOH(0.5) instead of the mixture of TEAOH and DIEA. SEM, N-2 adsorption/desorption, and NH3-TPD results suggest that the crystal size, textural parameters, and acidic properties of these SAPO-18 samples vary with the types of template molecules. The catalytic performances of three representative SAPO-18 catalysts were evaluated in the methanol-to-olefins (MTO) reaction. Owing to its unique sheet-like morphology and suitable acidity, the sample SP18-DIEA(0.5)TEAOH(0.5) exhibits the best catalytic performances in the MTO reaction, giving the longest catalytic lifetime of 430 min and ethylene plus propylene selectivity of 86%.
WOS研究方向	Chemistry
语种	英语
出版者	SPRINGER
WOS记录号	WOS:000852903600001
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/159808]
专题	石油化工学院
作者单位	Lanzhou Univ Technol, Sch Petrochem Technol, Key Lab Low Carbon Energy & Chem Engn Gansu Prov, Lanzhou 730050, Peoples R China
推荐引用方式 GB/T 7714	Niu, Li,Li, Yanru,Long, Xuefeng,et al. Grinding synthesis of SAPO-18 zeolite by a single/dual-template route: which is the best catalyst of methanol-to-olefins reaction?[J]. REACTION KINETICS MECHANISMS AND CATALYSIS,2022.
APA	Niu, Li.,Li, Yanru.,Long, Xuefeng.,Ji, Dong.,Wang, Dongliang.,...&Zhao, Xinhong.(2022).Grinding synthesis of SAPO-18 zeolite by a single/dual-template route: which is the best catalyst of methanol-to-olefins reaction?.REACTION KINETICS MECHANISMS AND CATALYSIS.
MLA	Niu, Li,et al."Grinding synthesis of SAPO-18 zeolite by a single/dual-template route: which is the best catalyst of methanol-to-olefins reaction?".REACTION KINETICS MECHANISMS AND CATALYSIS (2022).