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题名: Effect of SiO2/AL(2)O(3) ratio on synthesis of MCM-22, UTM-1 and kenyaite
作者: Liu, ZY;  Liu, ZM;  Qi, Y;  Xu, L;  He, YL;  Yang, Y;  Zhang, YY
关键词: MCM-22 zeolite ;  UTM-1 zeolite ;  kenyaite ;  hydrothermal synthesis ;  silica-alumina ratio
刊名: CHINESE JOURNAL OF CATALYSIS
发表日期: 2004-07-01
卷: 25, 期:7, 页:542-546
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences ;  Technology
类目[WOS]: Chemistry, Applied ;  Chemistry, Physical ;  Engineering, Chemical
研究领域[WOS]: Chemistry ;  Engineering
英文摘要: The unique porous network of MCM-22 suggests its potential use in a variety of catalytic processes. However, it is difficult to synthesize MCM-22 with high silica because the increase of SiO2/Al2O3 ratio in the gel often leads to contaminated zeolites. The synthesis of MCM-22, UTM-1 and kenyaite by rotating hydrothermal crystallization method, using fumed silica, sodium aluminate and hexamethyleneimide (HMI) as raw materials, was investigated. It was found that SiO2/Al2O3 ratio in the gel was an important factor affecting the product composition. When n(SiO2)/n(Al2O3) = 30similar to50, the product was MCM-22, and when n(SiO2)/n(Al2O3) = 71similar to190, the product was a mixture of MCM-22 and kenyalte. The fraction of MCM-22 decreased while that of kenyalte increased with the decrease in alumina content. When n (SiO2) In (Al1O3) = 228 similar to 609, 8-membered ring UTM-1 was obtained. Pure layered silicate kenyaite was obtained in the absence of alumina in the gel. The presence of alumina in the gel system was critical for the formation of MCM-22 and UTM-1, but it was not the case for kenyalte. In the synthesis of UTM-1, a shorter induction time was observed. MCM-22, UTM-1 and kenyalte could be distinguished from each other by SEM though they all had platelet morphology.
关键词[WOS]: ZEOLITE MCM-22 ;  CATALYSTS ;  MTF
语种: 英语
WOS记录号: WOS:000223181200009
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/139340
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Chinese Acad Sci, Dalian Inst Chem Phys, Dalian 116023, Liaoning, Peoples R China
2.Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China

Recommended Citation:
Liu, ZY,Liu, ZM,Qi, Y,et al. Effect of SiO2/AL(2)O(3) ratio on synthesis of MCM-22, UTM-1 and kenyaite[J]. CHINESE JOURNAL OF CATALYSIS,2004,25(7):542-546.
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