DICP OpenIR
Control of crystal transformation and mixed crystals of some zeolites and optimum conditions for synthesis of monocrystal zeolites
Peng, JB; Xie, SJ; Wang, QX; Xu, LY
KeywordMcm-22 Zsm-5 Zsm-35 Mordenite Crystal Transformation Crystal Mixture
Source PublicationCHINESE JOURNAL OF CATALYSIS
2002-07-01
Volume23Issue:4Pages:363-366
Indexed BySCI
SubtypeArticle
WOS HeadingsScience & Technology ; Physical Sciences ; Technology
WOS SubjectChemistry, Applied ; Chemistry, Physical ; Engineering, Chemical
WOS Research AreaChemistry ; Engineering
WOS KeywordMCM-22
AbstractThe influence of reaction temperature and reaction time on the crystallization of zeolites MCM-22, ZSM-5, ZSM-35 and mordenite was studied under the moderate ratio of silicon to aluminum using hexamethyleneimide as a template. MCM-22 was found to be an easily formed phase in this synthetic system because it appeared in the early stage of the crystallization process at both higher temperature and lower temperature. Whereas MCM-22 zeolite partially transformed to ZSM-5 and ZSM-35 with prolonging the reaction time at higher temperature, and finally transformed to ZSM-35. With this rule, the co-crystalline zeolite of MCM-22 and ZSM-35 was easily produced. The similar results of ZSM-5 and ZSM-35 mixed crystals could be achieved by varying reaction time at appropriate temperature. Upon analyzing the crystallization area of zeolites MCM-22, ZSM-5, ZSM-35 and mordenite, it is reasonable that the crystal transformations between these zeolites are prone to happen in this synthetic system, because all the zeolites have the same 5-ring sub-units, which bring little resistance to the reconstruction of frameworks, and the stability changing of the channel systems propels the occurrence of alternation of the linking modes of 5-ring units, leading to the formation of other type zeolites.
Language英语
WOS IDWOS:000177387000019
Citation statistics
Cited Times:15[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://cas-ir.dicp.ac.cn/handle/321008/139080
Collection中国科学院大连化学物理研究所
AffiliationChinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Liaoning, Peoples R China
Recommended Citation
GB/T 7714
Peng, JB,Xie, SJ,Wang, QX,et al. Control of crystal transformation and mixed crystals of some zeolites and optimum conditions for synthesis of monocrystal zeolites[J]. CHINESE JOURNAL OF CATALYSIS,2002,23(4):363-366.
APA Peng, JB,Xie, SJ,Wang, QX,&Xu, LY.(2002).Control of crystal transformation and mixed crystals of some zeolites and optimum conditions for synthesis of monocrystal zeolites.CHINESE JOURNAL OF CATALYSIS,23(4),363-366.
MLA Peng, JB,et al."Control of crystal transformation and mixed crystals of some zeolites and optimum conditions for synthesis of monocrystal zeolites".CHINESE JOURNAL OF CATALYSIS 23.4(2002):363-366.
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