Results 171 to 180 of about 1,890 (210)

CATALYTIC HYDROTREATMENT OF PETROLEUM RESIDUE

Fuel Science and Technology International, 1987
ABSTRACT 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, Abdullah A. Abbas, Ayad B. Ahmed, Abdul-Salam K. Al. Mayah   +3 more
openaire   +1 more source

Solvolysis and Catalytic Hydrotreatment of Wood

1993
The 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, S. Rezzoug, R. Capart, M. Gelus   +3 more
openaire   +1 more source

Kinetic model of continuous mixtures, for the hydrotreatment of diesel

Journal of Computational Methods in Sciences and Engineering, 2009
One 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, Elisa Verruschi, Alexander Peraza, Juan Freitez   +3 more
openaire   +1 more source

Effect of Hydrotreatment on Product Sludge Stability

Energy & Fuels, 2001
During severe hydrotreating, several chemical changes take place in the oil, which may lead to the formation of unstable products in which asphaltenic precipitates are released either in the downstream equipment or during storage of products. In the ongoing development of new hydrotreating processes and catalysts it is important to take steps to ...
Jesper Bartholdy, Ryan Lauridsen, Morten Mejlholm, Simon Ivar Andersen   +3 more
openaire   +1 more source

PROGRESSIVE HYDROTREATMENT OF HOKKAIDO COALS (JAPAN)

Liquid Fuels Technology, 1983
ABSTRACT Hokkaido coals were subjected to benzene extraction and non-catalytic hydrotreatment, alternatively, under progressive increase of temperature from 200 to 400 °C. For Taiheiyo coal the aliphatic materials in the hydrogen-rich part of the coal were converted to benzene soluble products at lower temperatures.
Ryoichi Yoshida, Yosuke Maekawa, Gen Takeya   +2 more
openaire   +1 more source

CATALYTIC HYDROTREATMENT OF COAL-DERIVED NAPHTHA

Fuel Science and Technology International, 1994
ABSTRACT ABSTRACT A naphtha derived from the liquefaction of a subbituminous (Black Thunder) or a bituminous coal (III. #6) was hydrotreated on a pilot plant scale, to provide a feedstock sufficiently low in heteroatoms for further studies in reforming.
Liguang Xu, Robert A. Keogh, Chen-Shi Huang, Robert L Spicer, Dennis E. Sparks, Scott Lambert, Gerald A. Thomas, Burtron H. Davis   +7 more
openaire   +1 more source

Support effects in the hydrotreatment of model molecules

Catalysis Today, 2008
Abstract The support effect on the activity of hydrotreating catalysts using model molecules was analyzed for catalysts supported on TiO 2 , SiO 2 and MgO. The results reported in the literature indicate that adequate design of the characteristics of the catalytic support is of great importance in the development of better hydrotreating catalysts ...
J RAMIREZ, F SANCHEZMINERO
openaire   +1 more source

Modeling in the development of hydrotreatment processes

Catalysis Today, 2004
Abstract 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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The catalytic hydrotreatment of peat pyrolysate oils

The Canadian Journal of Chemical Engineering, 1992
AbstractA 65 wt % yield of hexane‐soluble liquid, containing 83% of the feed carbon, was obtained when Finnish Carex‐peat pyrolysate was hydrotreated batchwise (21.5 MPa for two hours at 390°C with 10 wt % catalyst, 4% CoO/15.5% MoO3 on γ‐alumina). Oxygen content was lowered from 22% to 3% in the process.
Boocock, David, G.B., Oasmaa, Anja
openaire   +1 more source

Solvolysis and hydrotreatment of wood to provide fuel

Biomass and Bioenergy, 1996
The 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
openaire   +1 more source