Results 161 to 170 of about 2,421 (212)
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Hydrotreatment reactions with a disposable catalyst
Fuel, 1991Abstract The residue from the West Virginia University coal cleaning process may contain pyrite in significantly higher concentrations than the raw coal. Accordingly, the residue is used as a catalyst for the hydrodesulphurization (HDS) of benzothiophene and the hydrodenitrogenation (HDN) of quinoline. Grinding improves the performance of the residue
James L. Clements, Dady B. Dadyburjor
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CATALYTIC HYDROTREATMENT OF PETROLEUM RESIDUE
Fuel Science and Technology International, 1987ABSTRACT Iraqi reduced crude (350°C+) with a sulfur content of 4.3 wt% and a total metal content (Ni+V) of 141 WPPM was n-heptane deasphalted at specified conditions. The deasphalted oil (97.2 wt% of original residue) contains 4.1 wt% of sulfur and 103 ppm of metal.
Abdul-Halim A-K Mohammed +3 more
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Effect of Catalysts Acidity on Residues Hydrotreatment
Applied Catalysis B: Environmental, 2011The impact of hydrotreatment catalysts acid properties in residues hydrotreatment activities (hydrodemetallization (HDM), hydrodesulfurization (HDS), hydrodeasphaltenization (HDAsC7), hydrodenitrogenation (HDN) and Conradson carbon conversion (HDCCR)) was evaluated. NiMoP based catalysts carried on multimodal/bimodal alumina were used.
Sylvette Brunet, Denis Guillaume
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A Multivariable Controller for Hydrotreater Severity
1988 American Control Conference, 1988A multivariable controller has been implemented to control reaction severity of the FCCU feed hydrotreater unit at the Houston, Texas refinery of Lyondell Petrochemical Company (a division of Atlantic Richfield) The controller uses four manipulated variables to control three dependent variables.
D.E. Scott, P.D. Leggett, T.E. Stevenson
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Solvolysis and Catalytic Hydrotreatment of Wood
1993The objective of this study is to produce hydrocarbon fuel from wood in a two steps process. In the first step, pine wood powder is treated with acidified organic solvents such as ethanol, methanol, ethylene glycol, tetralin and mixture of them with phenol at relatively mild conditions.
A. Elamin +3 more
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Kinetic model of continuous mixtures, for the hydrotreatment of diesel
Journal of Computational Methods in Sciences and Engineering, 2009One of the major issues in the kinetic modeling of refining processes, such as hydro treatment (HDT) of gas oil, consists in that oil by-products contain a large number of individual components which are difficult to handle. In this sense, the concept of continuity in order to describe the elements of such mixtures through a continuous distribution ...
Yris Kenelma Gonzalez +3 more
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Solvolysis and hydrotreatment of wood to provide fuel
Biomass and Bioenergy, 1996The objective of this study is to describe a liquefaction process of wood in two successive steps. The wood is first dissolved in an organic solvent, acidified with small amounts of H2SO4, in mild conditions of temperature and pressure. The solvolytic oil is then subjected to a catalytic hydrotreatment at about 350°C.
Sid-Ahmed Rezzoug, Richard Capart
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Modeling in the development of hydrotreatment processes
Catalysis Today, 2004Abstract The kinetic modeling of the hydrodesulfurization (HDS) process is based upon the detailed reaction network, distinguishes between the hydrogenolysis- and hydrogenation-steps and accounts for the adsorption of the various reacting species on two types of active sites. The functional form of the rate equations for the conversion of thiophene, (
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Upgrading of Pyrolysis Oils by Hydrotreatment
1991Bio-oil can be produced by high-pressure, low-temperature liquefaction in a liquid-solid phase system or by moderate-temperature pyrolysis in a gas-solid phase system at ambient pressure. Both processes give an oxygenated product. While this liquid can be utilised directly in some applications, stabilisation or upgrading is needed to produce material ...
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Fluorinated hydrotreatment catalysts
Applied Catalysis, 1988Ch. Papadopoulou +3 more
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