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Development of Hydrodesulfurization Catalysts Using Molybdenum Complex with Molybdenum-sulfur Bonds (Part 1) Effect of Activation Method on Catalytic Activity
Hydrodesulfurization Dibenzothiophene Molybdenum dithiocarbamate
2009/7/24
The catalytic precursors of alumina-supported molybdenum dithiocarbamate (Mo-DTC) and molybdenum dithiophosphate (Mo-DTP) were assessed as catalysts for hydrodesulfurizastion (HDS). The effect of the...
Effect of Polyethylene Glycol Addition on Hydrodesulfurization Activity over CoO-MoO3/Al2O3 Catalyst
Cobalt molybdenum catalyst Hydrodesulfurization Polyethylene glycol
2009/7/24
A new additive approach using polyethylene glycol (PEG) as a water soluble organic compound was proposed to improve hydrodesulfurization activity over CoO-MoO3/Al2O3 catalyst. The addition of PEG to ...
Characterization of Carbonaceous Compounds Deposited on NiMo Catalyst Used for Ultra Deep Hydrodesulfurization of Gas Oil by Means of Temperature-programmed Oxidation Method
Ultra deep hydrodesulfurization Catalyst deactivation Carbonaceous deposit
2009/7/24
Ultra deep hydrodesulfurization (HDS) of several types of gas oil were performed over NiMo catalyst under various conditions and the carbonaceous deposits on the spent catalysts were characterized by...
Formation of Free Sulfur in Hydrodesulfurized Gas Oil—Precautions for Pilot Test of Ultra Deep Hydrodesulfurization Catalysts—
Ultra deep hydrodesulfurization Free sulfur Hydrogen sulfide Light gas oil
2009/7/24
Special precautions for evaluating ultra deep gas oil hydrodesulfurization catalysts in the pilot plant were investigated. Analysis using gas chromatograph atomic emission detector (GC-AED) and GC-MS...
Inhibition Effect of Hydrogen Sulfide and Ammonia on NiMo/Al2O3, CoMo/Al2O3, NiCoMo/Al2O3 Catalysts in Hydrodesulfurization of Dibenzothiophene and 4,6-Dimethyldibenzothiophene
Hydrodesulfurization Inhibition effect Nickel molybdenum catalyst
2009/7/24
Model hydrodesulfurization catalysts (Co2.75Mo11, Ni2.75Mo11 and Ni0.9Co1.85Mo11 wt%/γ-Al2O3) prepared by impregnation of similar supports with similar starting materials were used in the following t...
Effect of Polyethylene Glycol Addition on NiO-MoO3/Al2O3 and NiO-MoO3-P2O5/Al2O3 Hydrodesulfurization Catalyst
Nickel molybdenum catalyst Phosphorus Hydrodesulfurization Polyethylene glycol
2009/7/24
Addition of polyethylene glycol (PEG) as a water soluble organic compound to the impregnation solution during catalyst preparation was investigated to improve NiO-MoO3/Al2O3 and NiO-MoO3-P2O5/Al2O3 h...
Effects of Asphaltene Content in Atmospheric Residue and Mean Pore Size of Catalyst on Initial Deactivation of Hydrodesulfurization Catalyst
Hydrotreating Atmospheric residue Catalyst deactivation rate
2009/7/24
(HDS) of atmospheric residue (AR) over Ni-Co-Mo catalysts supported on γ-alumina was carried out to examine the effect of alumina pore size on HDS activity, hydrodemetallization (HDM) activity and ini...
Effect of Addition Method of Phosphorus on Alumina-supported NiMoP Catalysts —Hydrodesulfurization of 4,6-Dimethyldibenzothiophene and Characterization Using MAS NMR—
Nickel molybdenum catalyst Phosphorus addition Hydrodesulfurization
2009/7/24
A series of Ni-Mo-P/Al2O3 catalysts with phosphorus added by different methods were prepared. The hydrodesulfurization of 4,6-dimethyldibenzothiophene (4,6-DMDBT) was carried out using the catalysts....
An Overview of Hydrodesulfurization and Hydrodenitrogenation
Hydrotreating Hydrodesulfurization Hydrodenitrogenation Diesel fuel Gasoline
2009/7/24
Hydrodesulfurization (HDS) and hydrodenitrogenation (HDN) of petroleum products and intermediates are reviewed to provide the basis for developing processes to produce gasoline and diesel oil with ve...
Involvement of Asphaltene Decomposition in the Rapid Deactivation of Hydrodesulfurization Catalysts under Conditions for Deep Desulfurization of Atmospheric Residue
Hydrodesulfurization catalyst Atmospheric residue hydrotreating
2009/7/24
The effect of asphaltene (ASP) decomposition on catalyst deactivation under deep desulfurization conditions was investigated by reduction of sulfur from 0.3 to 0.1 mass% in a treated atmospheric resi...
Estimation of Coke and Metal Deposition Distribution within Hydrodesulfurization Catalyst Pore at the Last Stage of Operation
Hydrodesulfurization Model equation Thiele modulus Metal distribution estimation
2009/7/24
Hydrodesulfurization (HDS) of atmospheric residue (AR) carried out over Ni-Mo or Co-Mo catalyst requires a sudden increase in the reaction temperature for the desired desulfurization at the end of op...
Ultra-deep Hydrodesulfurization and Aromatics Hydrogenation of Diesel Fuel over a Pd-Pt Catalyst Supported on Yttrium-modified USY
Palladium-platinum catalyst USY zeolite Yttrium modification
2009/7/23
Bimetallic palladium-platinum catalyst supported on yttrium-modified ultrastable Y (USY) zeolite, Pd-Pt/Y-USY, showed high activity and stability for deep hydrodesulfurization (HDS) and hydrodearomat...
Preparation and Characterization of Co-Mo Model Sulfide Catalysts for Hydrodesulfurization
ydrodesulfurization Model catalyst Zeolite Support effect Cobalt molybdenum catalyst
2009/7/23
Development of highly active hydrodesulfurization (HDS) catalysts is one of the most urgent problems in the petroleum industry. Better characterization and understanding of the nature of HDS catalyst...