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	草酸脱铝Y沸石的性质; Properties of Y Zeolite Dealuminated by Oxalic Acid
	何静 ; 李宣文 ; 刘兴云 ; 裴站芬 ; 佘励勤
	1997
关键词	缺铝Y沸石 骨架铝空位 结构二次孔 化学脱铝 Dealuminated Y zeolite Aluminum vacancy Secondary pores Chemical dealuminization
英文摘要	草酸与草酸铵脱铝的Y沸石，具有八面沸石结构和良好的结晶度．羟基红外光谱和吡啶吸附的红外光谱表明，在脱铝Y沸石的骨架中存在着铝空位．这种块铝Y沸石中由3550cm-1表征的小笼羟基更具开放性，但稳定性较差，在升温过程中，它比3640cm－1表征的大笼羟基更易脱除．吡啶与CO双探针分子红外光谱的研究表明，升温脱羟基过程伴随着与Lewis酸有关的非骨架铝的生成．低温N2吸附的结果显示，缺铝Y沸石中还有远远大于铝空位的二次孔存在，这可能是升温过程中结构重排造成的。; The Y zeolite dealuminated by oxalic acid and ammonium oxalate maintained the faujasite structure with a good crystallinity. The OH-IR spectra and chemical analysis showed that there were aluminum vacancies in the framework of the dealuminated Y zeolite. In such a dealuminated Y zeolite, the hydroxyls represented by 3550cm(-1) was accessible to pyridine, while not so stable as the hydroxyls represented by 3640cm(-1) when they were heated in vacuum. The IR spectra of double probes of Pyridine and CO illustrate the production of extra-framework aluminum species which are related to Lewis acid sites in the process of dehydroxylation. The results of N-2 adsorption at low temperature suggest the existence of secondary pores which are much larger than the aluminum vacancies, and this probably resulted from the structure reconstruction.; http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000207601600014&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=8e1609b174ce4e31116a60747a720701 ; SCI(E); 中文核心期刊要目总览(PKU); 中国科学引文数据库(CSCD); 2; 06; 554-559; 13
语种	中文
出处	SCI ; 知网
出版者	物理化学学报
内容类型	其他
源URL	[http://hdl.handle.net/20.500.11897/78952]
专题	化学与分子工程学院
推荐引用方式 GB/T 7714	何静,李宣文,刘兴云,等. 草酸脱铝Y沸石的性质, Properties of Y Zeolite Dealuminated by Oxalic Acid. 1997-01-01.

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