NDLI: Comparative Study of In situ/Ex situ Activated Trimetallic NiMoW Sulfide Catalysts Prepared from Ammonium Thiomolybdotungstates

Content Provider	Springer Nature Link
Author	Bocarando, J. Alonso Nuñez, G. Bensch, W. Huirache Acuña, R. Del Valle, M. Cruz Reyes, J.
Copyright Year	2009
Abstract	Unsupported trimetallic NiMoW sulfide catalysts with high hydro-desulphurization activities are prepared from Ni-containing ammonium thiomolybdo tungstates by in situ and ex situ activation. These precursors are prepared by adding an aqueous NiCl2 solution to an aqueous (NH4)4MoWS8 solution in either a 1:1 or 0.5:1 Ni/Mo(W) molar ratio. The resulting precursors Ni0.5/(NH4)4MoWS8 and Ni/(NH4)4MoWS8 yield Ni0.5MoW-in situ, NiMoW-in situ, Ni0.5MoW-ex situ and NiMoW-ex situ sulphide catalysts, respectively. The activation method affects both physical and chemical properties, such as macro and microstructure, crystalline structure, specific surface area, N2 adsorption–desorption isotherms. The in situ/ex situ activation of these ammonium thiotrimetallate precursors leads to a mesoporous structure with a pore size ranging from 20 to 60 Å and type IV N2 adsorption–desorption isotherms. X-ray diffraction patterns of unsupported NiMoW sulfide catalysts correspond to those of a microcrystalline material, with outstanding reflections attributed to MoS2, WS2, NiS, and Ni9S8 phases.
Starting Page	301
Ending Page	307
Page Count	7
File Format	PDF
ISSN	1011372X
Journal	Catalysis Letters
Volume Number	130
Issue Number	3-4
e-ISSN	1572879X
Language	English
Publisher	Springer US
Publisher Date	2009-03-25
Publisher Place	Boston
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Tri-metallic catalysts In situ/ex situ activation Hydrodesulphurization Pharmacy Industrial Chemistry/Chemical Engineering Physical Chemistry Catalysis
Content Type	Text
Resource Type	Article
Subject	Chemistry Catalysis

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