Study of Mn incorporation into SAPO framework: Synthesis, characterization and catalysis in chloromethane conversion to light olefins

	Study of Mn incorporation into SAPO framework: Synthesis, characterization and catalysis in chloromethane conversion to light olefins
	Wei, YX ; He, YL ; Zhang, DH ; Xu, L ; Meng, SH ; Liu, ZM ; Su, BL
刊名	microporous and mesoporous materials
	2006-03-20
卷号	90 期号:1-3 页码:188-197
关键词	SAPO-34 MnAPSO-34 molecular sieves Mn incorporation Si islands acidity ammonia adsorption chloromethane conversion light olefins
英文摘要	mnapso-34 molecular sieve has been synthesized with triethylamine as the template, characterized with xrd, xrf, p-31, al-27 and si-21 nmr and ft-ir techniques and compared with sapo-34. the template decomposition and removal have been investigated with tg-dtg-dsc coupled with mass spectrometer. mn incorporation generates a negligible difference on the chemical shift in p-31 and al-27 mas nmr, while an effect on the intensity of resonance peaks is revealed. si-29 mas nmr study has demonstrated that mn incorporation favors the si island formation, which may give rise to the stronger acidic sites. the thermal analysis (tg-dsc) on template removal in a diluted oxygen atmosphere, leading to the formation of co2, no and h2o, showed, besides a low temperature endothermic weight loss due to the desorption of water, two weight losses (200-400 and 400-600 degrees c) for sapo-34 and mnapso-34, suggesting two different chemical location environments of template molecules in these two molecular sieves. the quantity of template removed at higher temperature range is much higher in mnapso-34, indicating stronger template-framework interaction and stronger acidity after calcination. the acid difference caused by mn incorporation has also been evidenced by ammonia adsorption evaluated by ft-ir. chloromethane transformation was carried out over mnapso-34 and sapo-34 and the catalytic performance showed that both molecular sieves are very active and selective catalyst for light olefins production. mnapso-34 demonstrated higher activity and light olefins selectivity. (c) 2005 elsevier inc. all rights reserved.
WOS标题词	science & technology ; physical sciences ; technology
类目[WOS]	chemistry, applied ; chemistry, physical ; nanoscience & nanotechnology ; materials science, multidisciplinary
研究领域[WOS]	chemistry ; science & technology - other topics ; materials science
关键词[WOS]	silicoaluminophosphate molecular-sieves ; crystalline inorganic solids ; bronsted acid sites ; infrared-spectroscopy ; silicon incorporation ; thermal-decomposition ; hydrocarbon formation ; methanol conversion ; reaction-mechanism ; topological model
收录类别	SCI
语种	英语
WOS记录号	WOS:000236051100021
公开日期	2015-11-17
内容类型	期刊论文
源URL	[http://159.226.238.44/handle/321008/140208]
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 Namur, ISIS, Lab Chim Mat Inorgan, B-5000 Namur, Belgium 2.Chinese Acad Sci, Dalian Inst Chem Phys, Nat Gas Utilizat & Appl Catalysis Lab, Dalian 116023, Peoples R China
推荐引用方式 GB/T 7714	Wei, YX,He, YL,Zhang, DH,et al. Study of Mn incorporation into SAPO framework: Synthesis, characterization and catalysis in chloromethane conversion to light olefins[J]. microporous and mesoporous materials,2006,90(1-3):188-197.
APA	Wei, YX.,He, YL.,Zhang, DH.,Xu, L.,Meng, SH.,...&Su, BL.(2006).Study of Mn incorporation into SAPO framework: Synthesis, characterization and catalysis in chloromethane conversion to light olefins.microporous and mesoporous materials,90(1-3),188-197.
MLA	Wei, YX,et al."Study of Mn incorporation into SAPO framework: Synthesis, characterization and catalysis in chloromethane conversion to light olefins".microporous and mesoporous materials 90.1-3(2006):188-197.