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题名: Study on hydrodesulfurization mechanism of 4,6-dimethyldibenzothiophene I. Catalytic behavior of NiW-based catalysts
作者: Zuo, DH;  Xie, YP;  Nie, H;  Shi, YH;  Li, C
关键词: nickel ;  tungsten ;  alumina ;  silica ;  supported catalyst ;  4,6-dimethyldibenzothiophene ;  hydrodesulfurization ;  isomerization
刊名: CHINESE JOURNAL OF CATALYSIS
发表日期: 2002-05-01
卷: 23, 期:3, 页:271-275
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: NiW-based catalysts supported on gamma-Al2O3, amorphous silica-alumina and rare earth HY zeolite-containing gamma-Al2O3, respectively, were prepared by incipient wetness co-impregnation method. Hydrodesulfurization (HDS) of 4, 6-dimethyldibenzothiophene (DMDBT) was performed in a continuous flow microreactor under the conditions of p = 4.14 MPa and theta = 270 similar to 330 degreesC. The DMDBT was dissolved in decane to obtain 0.1% sulfur solution. The liquid products were analyzed by GC-FID equipped with a capillary column. The results showed that the NiW-based catalysts exhibit better performance for desulfurization and hydrogenation of DMDBT, and the main product is dimethylcyclohexylbenzene with selectivity of 59.4%. The enhancement of hydrogenation activity is the most effective way to increase HDS activity. The enhancement of support acidity favors direct desulfurization and leads to a small amount of cracking products. NiW catalysts on acidic supports can transform DMDBT into isomers by migrating methyl groups adjacent to the S atom, which also favors desulfurization of DMDBT. However, their hydrogenation activity is inferior to that of alumina-supported sample. Based on the experimental results, the different reaction pathways of DMDBT transformation were proposed.
关键词[WOS]: DEEP HYDRODESULFURIZATION ;  LIGHT OIL ;  SUBSTITUTED DIBENZOTHIOPHENES ;  SUPPORTED SULFIDES ;  SULFUR-COMPOUNDS ;  MOLYBDENUM ;  ALKYLDIBENZOTHIOPHENES ;  DESULFURIZATION ;  FUNCTIONALITIES ;  COMPLEXES
语种: 英语
WOS记录号: WOS:000176236500018
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/139152
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.SINOPEC, Res Inst Petr Proc, Beijing 100083, Peoples R China
2.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China

Recommended Citation:
Zuo, DH,Xie, YP,Nie, H,et al. Study on hydrodesulfurization mechanism of 4,6-dimethyldibenzothiophene I. Catalytic behavior of NiW-based catalysts[J]. CHINESE JOURNAL OF CATALYSIS,2002,23(3):271-275.
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