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Effect of oxygen on aromatization of methane over Mo/HZSM-5 zeolite
Yuan, SD; Feng, ZC; Ying, PL; Li, C
关键词Laser Induced Fluorescence Spectroscopy Molybdenum Hzsm-5 Zeolite Methane Aromatization
刊名CHINESE JOURNAL OF CATALYSIS
2002-03-01
23期:2页:150-152
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 effect of oxygen on aromatization of methane over Mo/HZSM-5 zeolite was studied. It was found that there exists a threshold value of the oxygen concentration. The durability of Mo/HZSM-5 zeolite in aromatization of methane is greatly improved by the added oxygen when the oxygen concentration is lower than the threshold value; otherwise, the total oxidation of methane takes place. The Mo/HZSM-5 samples after aromatization of methane in the presence of oxygen was characterized by UV-Raman spectroscopy and laser induced fluorescence spectroscopy (LIFS). It was disclosed that the amount of coke, the carburization degree of molybdenum species and the wavelength of a band at 520 similar to 580 nm in the LIFS of Mo/HZSM-5 zeolite decrease monotenously with the rising of oxygen concentration. It was suggested that the variation of the LIFS band with the oxygen concentration originates from the difference in the caburization degree of molybdenum species. The band at similar to580 nm in LIFS is tentatively assigned to MoOxCy/HZSM-5 and the band at 520 nm to MoO3/HZSM-5. So MoOxCy/HZSM-5 can be suggested to be the active phase for aromatization of methane over Mo/HZSM-5 in the presence of oxygen.
语种英语
WOS记录号WOS:000175026000016
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被引频次:2[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://cas-ir.dicp.ac.cn/handle/321008/139146
专题中国科学院大连化学物理研究所
作者单位Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China
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Yuan, SD,Feng, ZC,Ying, PL,et al. Effect of oxygen on aromatization of methane over Mo/HZSM-5 zeolite[J]. CHINESE JOURNAL OF CATALYSIS,2002,23(2):150-152.
APA Yuan, SD,Feng, ZC,Ying, PL,&Li, C.(2002).Effect of oxygen on aromatization of methane over Mo/HZSM-5 zeolite.CHINESE JOURNAL OF CATALYSIS,23(2),150-152.
MLA Yuan, SD,et al."Effect of oxygen on aromatization of methane over Mo/HZSM-5 zeolite".CHINESE JOURNAL OF CATALYSIS 23.2(2002):150-152.
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