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dc.contributor.authorLin, HQ
dc.contributor.author林海强
dc.contributor.authorYang, LF
dc.contributor.author杨乐夫
dc.contributor.authorWan, HL
dc.contributor.author万惠霖
dc.contributor.authorLiu, YL
dc.contributor.author刘云凌
dc.contributor.authorPang, WQ
dc.contributor.author庞文琴
dc.date.accessioned2012-05-26T02:53:32Z
dc.date.available2012-05-26T02:53:32Z
dc.date.issued2001
dc.identifier.citationCHEMICAL JOURNAL OF CHINESE UNIVERSITIES-CHINESE,2001,22(12):1971-1975zh_CN
dc.identifier.issn0251-0790
dc.identifier.urihttps://dspace.xmu.edu.cn/handle/2288/12507
dc.description.abstractThe synthesis of A-type zeolite membranes on porous alpha -Al2O3 supports via the method of seeding plus secondary hydrothermal crystallization has been studied. The seed layers, which were prepared from colloidal A-type zeolite synthesized from the reaction mixture of n[(TMA)(2)O] : n(SiO2) n (Al2O3) : n(Na2O) : n(H2O) = 13.4 : 11.25 : 1.8 : 0.3 : 700, were treated by steam of ammonia to inhibit the formation of cracks when dried. Compact zeolite membranes constituted with multiple-twined zeolite crystals were accessed by hydrothermal growth of seed layers in the reaction sol of n (Na2O) n(Al2O3) : n(SiO2) = n(H2O) = 3 : 1 : 1 : 800. In highly alkaline hydrothermal solutions, seed layers tended to dissolve and loose zeolite membranes with many defects were obtained. The gas permeanbility on A-type zeolite membrane dried at 393 K, in which water molecular still inhabited the zeolitic channels, was quite low, suggesting that the membrane was close to free of defects. Defects were formed mainly due to different thermal expansion coefficients between alpha -Al2O3 support and zeolite membrane when the calcinations at 823 K was carried out to free the channel of membrane zeolites.zh_CN
dc.language.isozhzh_CN
dc.publisherHIGHER EDUCATION PRESSzh_CN
dc.subjectzeolite membranezh_CN
dc.subjectmembrane separationzh_CN
dc.subjectA-type zeolitezh_CN
dc.subjectinorganic membranezh_CN
dc.titleDense A-type zeolite membrane synthesized by seedingzh_CN
dc.typeArticlezh_CN


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