Methane dehydrogenation and aromatization in the absence of oxygen on Mo/HZSM-5: A study on the interaction between Mo species and HZSM-5 by using Al-27 and Si-29 MAS NMR
文献类型：期刊论文
| 作者 | Liu, W; Xu, Y; Wong, ST; Wang, L; Qiu, J; Yang, N |
| 刊名 | JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL
 |
| 出版日期 | 1997-06-13 |
| 卷号 | 120期号:1-3页码:257-265 |
| 关键词 | Al-27 And Si-29 Mas Nmr Dealumination Mo/hzsm-5 Al-2(Moo4)(3) Methane Activation |
| ISSN号 | 1381-1169 |
| 文献子类 | Article |
| 英文摘要 | By using a high-resolution solid state nuclear magnetic resonance spectrometer with Al-27 and Si-29 probes, the interaction between Mo species and HZSM-5 of Mo/HZSM-5 catalysts has been studied. The results show that there is a strong interaction between Mo species and HZSM-5 zeolite. The framework aluminum in the zeolite can be easily extracted by the introduction of Mo species. The extractability of framework aluminum by Mo species increases with increasing Mo loading and the calcination temperature, The extraction process leads to the formation of non-framework Al at first and then a new crystalline phase of Al-2(MoO4)(3). The dealumination of the catalyst having a Mo loading of 15% and had been calcined at 973 K is so severe that all the aluminum in the framework are extracted and no framework Al could be detected by Al-27 MAS NMR. The catalyst, therefore, lost its catalytic activity for methane dehydrogenation and aromatization in the absence of oxygen, The Si/Al ratio measured from Si-29 MAS NMR further confirms the dealumination process observed by Al-27 MAS NMR. The MAS NMR results give us an evidence that Al-2(MoO4)(3) crystallites are much less active for the reaction. |
| WOS关键词 | NUCLEAR-MAGNETIC-RESONANCE ; ZEOLITE ; HYDRATION ; ALUMINUM ; BEHAVIOR ; SI ; AL |
| WOS研究方向 | Chemistry |
| 语种 | 英语 |
| WOS记录号 | WOS:A1997XE58900034 |
| 出版者 | ELSEVIER SCIENCE BV |
| 源URL | [http://cas-ir.dicp.ac.cn/handle/321008/168190]  |
| 专题 | 大连化学物理研究所_中国科学院大连化学物理研究所 |
| 作者单位 | 1.CHINESE ACAD SCI,DALIAN INST CHEM PHYS,STATE KEY LAB CATALYSIS,DALIAN 116023,PEOPLES R CHINA 2.ACAD SINICA,WUHAN INST PHYS,STATE KEY LAB MR & AMP,WUHAN 430071,PEOPLES R CHINA |
| 推荐引用方式 GB/T 7714 | Liu, W,Xu, Y,Wong, ST,et al. Methane dehydrogenation and aromatization in the absence of oxygen on Mo/HZSM-5: A study on the interaction between Mo species and HZSM-5 by using Al-27 and Si-29 MAS NMR[J]. JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL,1997,120(1-3):257-265. |
| APA | Liu, W,Xu, Y,Wong, ST,Wang, L,Qiu, J,&Yang, N.(1997).Methane dehydrogenation and aromatization in the absence of oxygen on Mo/HZSM-5: A study on the interaction between Mo species and HZSM-5 by using Al-27 and Si-29 MAS NMR.JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL,120(1-3),257-265. |
| MLA | Liu, W,et al."Methane dehydrogenation and aromatization in the absence of oxygen on Mo/HZSM-5: A study on the interaction between Mo species and HZSM-5 by using Al-27 and Si-29 MAS NMR".JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL 120.1-3(1997):257-265. |
入库方式： OAI收割
来源：大连化学物理研究所
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