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题名: Acidity Characterization of HZSM-35 Zeolite by Solid-State NMR
作者: Liu Yong1, 2;  Zhang Weiping1;  Xie Sujuan1;  Xu Longya1;  Han Xiuwen1;  Bao Xinhe1
关键词: HZSM-35 zeolite ;  acidity ;  solid-state nuclear magnetic resonance ;  probe molecule ;  trimethylphosphine ;  deuterated pyridine
刊名: CHINESE JOURNAL OF CATALYSIS
发表日期: 2009-02-01
卷: 30, 期:2, 页:119-123
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 accessibility and acidity of HZSM-35 zeolite were studied by high-resolution solid-state MAS NMR spectroscopy after adsorption of deuterated pyridine or trimethylphosphine as probe molecules. The results showed that the probe molecules could enter both the ten-membered ring (10-MR) channels and eight-membered ring (8-MR) cavities. However, the diffusion into the 8-MR cavities was very slow and it took a long time to reach the adsorption equilibrium at 300 degrees C. After adsorption of deuterated pyridine, (1)H MAS NMR spectra showed that there were two types of Bronsted acidic sites with different strength in both the 10-MR channels and 8-MR cavities. After adsorption of trimethylphosphine, the (31)P MAS NMR spectra indicated that there were Lewis acidic sites in HZSM-35 zeolite, but their strength and amount were less than the Bronsted acidic sites.
关键词[WOS]: SKELETAL ISOMERIZATION ;  PROBE MOLECULE ;  H-FERRIERITE ;  N-BUTENE ;  SITES ;  SPECTROSCOPY ;  TRIMETHYLPHOSPHINE
语种: 英语
WOS记录号: WOS:000264168700008
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/141448
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, State Key Lab Catalysis, Dalian 116023, Liaoning, Peoples R China
2.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China

Recommended Citation:
Liu Yong,Zhang Weiping,Xie Sujuan,et al. Acidity Characterization of HZSM-35 Zeolite by Solid-State NMR[J]. CHINESE JOURNAL OF CATALYSIS,2009,30(2):119-123.
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