National Repository of Grey Literature 26 records found  1 - 10nextend  jump to record: Search took 0.00 seconds. 
Preparation and Activity on Unsupported Hydrotreating Catalysts.
Moravčík, Jan ; Gulková, Daniela ; Kaluža, Luděk
The aim of the present work is to investigate reactivity of precursors of CoMo and NiMo catalysts (molar ratio 0.3- Co/(Co-iMo) ol'Co or Ni) in aqueous solution with intention to prepare high surface area (ST) sulfides.
Hydrotreating over Silica-Alumina Supported Catalysts
Gulková, Daniela ; Vít, Zdeněk ; Kaluža, Luděk
They are studied for possible use in deep hydrodesulfurization (HDS)1 while they have not been investigated for the HDS parallel with hydrodeoxygenation (HDO)2. The aim was to find the effect of active phase and support of Pd and PdPt catalysts on activity and selectivity in HDS of 4,6-dimethyldibenzothiophene (DMDBT) and HDS/HDO of l-benzothiophene/octanoic acid (BT/OA).
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Plný tet: 00206B6C274C191104130820 - Download fulltextDOC
The Novel Preparation of Hydrotreating Catalysts Using Machanochemical Activation of Aluminum Nitrate and NiMo Complexes.
Kaluža, Luděk ; Jirátová, Květa ; Tyuliev, G. ; Gulková, Daniela ; Balabánová, Jana ; Palcheva, R. ; Koštejn, Martin ; Spojakina, A.
The novel Al2O3 synthesis by mechanochemical activation of aluminum nitrate hydrate was applied to prepare hydrodesulfurization (HDS) NiMo catalysts. Impregnation techniques using the complex made by dissolution of nitrilotriacetic acid (NTA), ammonium heptamolybdate and nickel nitrate and the Anderson-type heteropolyoxymolybdate ((NH4)4Ni(OH)6Mo6O18) complex were compared with conventional impregnation using subsequent deposition of ammonium heptamolybdate (first) and nickel nitrate (second) with calcination in between. Properties of the support and HDS catalysts were studied by N2 physisorption, Raman spectroscopy, H2 temperature-programmed reduction (H2-TPR), O2 chemisorption and X-ray photoelectron spectroscopy (XPS).
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Preparation and Relative Activity of Nobia-Supported CoMo Hydrodesulfurization Catalysts.
Kaluža, Luděk ; Zdražil, Miroslav
Evaluation of new supports alternative to alumina, for instance: ZrO2, TiO2, active carbon or zeolites, is an important topic of recent research on hydrodesulfurization catalysts. Nb2O5 was also considered as the support of Mo and Co(Ni)Mo sulfides and as a precursor of the active phase, niobium sulfide.
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Plný tet: SKMBT_C22018110914040 - Download fulltextPDF
Effect of Promotion Metals on Activity of Zirconia Supported Molybdenum Sulfide Catalyst in Parallel Hydrodesulfurization of 1-Benzotiophene and Hydrogenation of 1-Methyl-Cyklohex-1-ene.
Kaluža, Luděk ; Gulková, Daniela
Promotion of hydrodesulfurization and hydrogenation activity of MoS2 supported on unconventional support ZrO2 (baddeleyite, SBET = 108 m2g-1) by Co, Ni, Ru, Rh, Pd, Ir, and Pt was studied.
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Plný tet: SKMBT_C22016112410220 - Download fulltextPDF
Preparation of Hydrodesulfurization Magnesia Supported Cobalt-Molybdenum Catalysts
Kaluža, Luděk ; Gulková, Daniela ; Vít, Zdeněk ; Zdražil, Miroslav
The aim of the present work was to elucidate the possibility of deposition of molybdenyl- and cobalt- acetylacetonates on the high surface area MgO by impregnation from solutions of these compounds in methanol. The prepared CoMo/MgO catalysts exhibited at least 3.3 fold activities in benzothiophene HDS as the reference industrial CoMo/Al2O3 catalyst.
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Plný tet: SKMBT_C22014110714021 - Download fulltextPDF
Preparation of CoMo/MgO Catalysts for Hydrodesulfurization
Gulková, Daniela ; Kaluža, Luděk ; Zdražil, Miroslav ; Vít, Zdeněk
The aim of the present work was to elucidate the possibility of deposition of molybdenyland cobalt- acetylacetonates on the high surface area MgO by impregnation from solutions of these compounds in methanol. Furthermore, non-aqueous solutions of MoO3 and CoCO3, (NH4)6Mo7O24 and Co(NO3)2, MoO2(C5H7O2)2 and Co(C5H7O2)2 with chelating agent nitrilotriacetic acid (NTA) were studied for CoMo deposition in one impregnation step.
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Plný tet: SKMBT_C22014082908311 - Download fulltextPDF

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