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Study of Mo-based catalysts for dehydro-aromatization of methane
Ye, F; Yu, L; Song, YB; Sun, CY; Fang, YW; Hao, ZF; Lin, WM; Xu, YD; Lin, LW
关键词Methane Aromatization Hzsm-5 Zeolite Pricise Pretreatment Carbon Deposit Iron Molybdenum
刊名CHINESE JOURNAL OF CATALYSIS
2003-03-01
24期:3页:198-202
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
关键词[WOS]ZEOLITE CATALYSTS ; NONOXIDATIVE CONDITIONS ; MO/HZSM-5 ; BENZENE ; CONVERSION ; DEHYDROCONDENSATION ; NAPHTHALENE ; PERIOD ; SITES
英文摘要Methane dehydro-aromatization over Mo/HZSM-5 catalyst has been widely studied in recent years. One of the main problems for the industrial application is the short lifetime of the catalyst owing to the serious carbon deposit on the catalyst surface. The addition of CO or CO2 in feed as well as the steaming-dealumination and the silanization of the support was used to enhance the stability of the catalyst. In order to effectively suppress the formation of carbon deposit, we designed an easy and special route to prepare the Mo/HZSM-5(t) catalyst, in which HZSM-5 was precisely pretreated by calcination in air at 400 degreesC for 4 h, then re-calcination in N-2 at 500 degreesC for 4 h (precise pretreatment of support) before impregnation with ammonium molybdate. The precise pretreatment was found to be able to significantly improve the activity and the stability of the catalyst. On Mo/HZSM-5 (t), the methane conversion and benzene yield even remained at 8.8% and 5.3% respectively after 30 h. Addition of promoter Fe leads to a significant increase in methane conversion and the selectivity for benzene, and methane conversion and benzene yield increase by 18% and 52% respectively, compared with Mo/ HZSM-5(t). Through XRD and TPO characterization, it is concluded that Mo and Fe species are highly dispersed on the surface of the support or migrate into the channels of the support. The precise pretreatment of support and the addition of Fe restrain carbon deposit, hence the catalysts with high stability can be obtained.
语种英语
WOS记录号WOS:000182347400009
引用统计
文献类型期刊论文
条目标识符http://cas-ir.dicp.ac.cn/handle/321008/138322
专题中国科学院大连化学物理研究所
作者单位1.Shantou Univ, Dept Chem, Shantou 515063, Guangdong, Peoples R China
2.S China Univ Technol, Dept Chem Engn, Guangzhou 510641, Guangdong, Peoples R China
3.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Liaoning, Peoples R China
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GB/T 7714
Ye, F,Yu, L,Song, YB,et al. Study of Mo-based catalysts for dehydro-aromatization of methane[J]. CHINESE JOURNAL OF CATALYSIS,2003,24(3):198-202.
APA Ye, F.,Yu, L.,Song, YB.,Sun, CY.,Fang, YW.,...&Lin, LW.(2003).Study of Mo-based catalysts for dehydro-aromatization of methane.CHINESE JOURNAL OF CATALYSIS,24(3),198-202.
MLA Ye, F,et al."Study of Mo-based catalysts for dehydro-aromatization of methane".CHINESE JOURNAL OF CATALYSIS 24.3(2003):198-202.
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