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题名: Hydrodesulfurization of 4,6-DMDBT on multi-metallic bulk catalyst NiAlZnMoW: Effect of Zn
作者: Chen, Yandie1, 2;  Wang, Lu1;  Liu, Xinyi1;  Liu, Tiefeng1;  Huang, Baokun1;  Li, Ping1;  Jiang, Zongxuan1;  Li, Can1
关键词: Layered structure ;  4,6-Dimethyldibenzothiophene ;  Hydrodesulfurization ;  Multi-metallic bulk catalyst ;  Promoter effect
刊名: APPLIED CATALYSIS A-GENERAL
发表日期: 2015-09-05
DOI: 10.1016/j.apcata.2015.01.039
卷: 504, 页:319-327
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences ;  Life Sciences & Biomedicine
类目[WOS]: Chemistry, Physical ;  Environmental Sciences
研究领域[WOS]: Chemistry ;  Environmental Sciences & Ecology
英文摘要: Multi-metallic bulk HDS catalysts NixZnyAlzMoW with different Zn/Al molar ratio were prepared using a NiZnAl-layered hydroxide precursor by co-precipitation method. XRD, HRTEM, and SEM results show that the catalysts possess layered structure, and the layered precursor NixZnyAlz-LDH is a mixture of ZnAl-LDH and NiAl-LDH. Ni(Zn)-promoted Mo(W) active species Ni(Zn)-Mo(W)-S are detected by Raman spectroscopy and HRTEM. Hydrodesulfurization (HDS) result of 4,6-dimethyldibenzothiophene (4,6-DMDBT) shows that catalysts NixZnyAlzMoW exhibit excellent HDS performance and the sulfur content in the model diesel could be reduced from 517 ppm to less than 10 ppm (under mild reaction conditions of 3.0 MPa of H-2 pressure, 300 degrees C, LHSV of 9 h(-1), and H-2/oil ratio of 800 Ncm(3)/cm(3)). Catalysts NixZnyAlzMoW show higher HDS activity than the commercial catalyst CoNiMoW/Al2O3 due to the high active metal content, the layered structure, and the positive promoter effect of Zn. Besides, Zn-doping also reduces the apparent activation energy of catalysts and results in larger pore volume and larger pore size for catalysts. Part of Zn (Ni) acts as a promoter but other part as a support. The promoter effect of Zn is partially responsible for the high HDS activity. It is found that the second promoter Zn decreases the interaction between alumina and active components Ni, Mo, W to form more Ni(Zn)-Mo(W)-S active species. (C) 2015 Elsevier B.V. All rights reserved.
关键词[WOS]: SULFIDE HYDROTREATING CATALYSTS ;  ZNNIMO/GAMMA-ALUMINA CATALYSTS ;  DIESEL FUELS ;  DEEP DESULFURIZATION ;  SPILLOVER HYDROGEN ;  HDS CATALYSTS ;  MOS2 CATALYST ;  NI ;  DIBENZOTHIOPHENE ;  SULFUR
语种: 英语
WOS记录号: WOS:000362604200036
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/146581
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, Peoples R China
2.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China

Recommended Citation:
Chen, Yandie,Wang, Lu,Liu, Xinyi,et al. Hydrodesulfurization of 4,6-DMDBT on multi-metallic bulk catalyst NiAlZnMoW: Effect of Zn[J]. APPLIED CATALYSIS A-GENERAL,2015,504:319-327.
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