Centre National De La Recherche Scientifique

Pechiney Recherche

Pechiney Electrometallurgie

Total Sa

Universitéde Strasbourg

Université Louis Pasteur

Total France

Totalfinaelf France

Université Louis Pasteur De Strasbourg

Sicat

Entre National De La Recherche Scientifigue

Total Raffinage Marketing

Marc-Jacques Ledoux

Cuong Pham-Huu

Jean-Louis Guille

Sophie Marin

Jacques Bousquet

Sabine Savin-Poncet

Dominique Begin

Marie Prin

Nicolas Keller

Pierre Bernhardt

Patrick Nguyen

Gilbert Maire

Charlotte Pham

Valérie Keller-Spitzer

Jean-Philippe Tessonnier

Estelle Vanhaecke

Thierry Romero

Mathieu Grandcolas

Izabela Janowska

Shabnam Hajesmaili

Ramdane Benazouz

Giorgio Agostini

Hugh Dunlop

Cuong Pham Huu

Pascaline Leroi

Behrang Madani

Michel Kartheuser

Michel Wolf

Laurie Pesant

Julien Amadou

Nathanaëlle Wurtz

Sébastien Josset

Maxime Lacroix

Daniel Schweich

Nizar Doss

Cuong Pahm-Huu

The invention relates to a photocatalyst comprising a &#x3b2;-SiC cellular foam and a photocatalytically active phase, deposited directly on said cellular foam or on an intermediate phase deposited on said cellular foam. The average size of the cells is between 2500 &#x3bc;m and 5000 &#x3bc;m. The foam can comprise nanotubes or nanofibers (particularly of carbon, SiC, and TiO) that consist of, or carry as an intermediate phase, a photocatalytically active phase.

Photocatalysts based on structured three-dimensional carbide, in particular &#x3b2;-SiC, foams

A method of preparing a solid material based on tangled nanotubes and/or nanofibers, includes a step of growing carbon nanofibers and/or nanotubes with restraint in a contained reactor; and the materials thus obtained. The different uses of the materials are also disclosed.

Materials based on tangled nanotubes or nanofibres, preparation method thereof and use of same

This invention relates to &#x3b2;-SiC foam parts with a specific surface area preferably equal to at least 5 m/g and with at least two zones A and B with a different cellular porosity distribution, wherein the parts were made by chemical transformation of a porous precursor medium comprising at least two blocks A' and B&#x2032;, each having a different cellular porosity distribution, and in that the at least two zones A and B are derived from the chemical transformation of the two blocks A&#x2032; and B&#x2032;. This foam, optionally after deposition of an active layer, may be used as a filter medium in cartridges designed for the purification of exhaust gases. The invention also relates to manufacturing processes for preparing such a filter medium.

Catalytic filter based on silicon carbide (&#x3b2;-SiC) for combustion of soot derived from exhaust gases from an internal combustion engine

In a process for the conversion of carbon monoxide to Chydrocarbons in the presence of hydrogen and of a catalyst comprising a metal and a support comprising silicon carbide, the support comprises more than 50% by weight of silicon carbide in the beta form. A process for the conversion of carbon monoxide to Chydrocarbons in the presence of hydrogen and of a catalyst the effluent thus obtained are also disclosed.

Process for the conversion of a synthesis gas to hydrocarbons in the presence of beta-SiC and effluent from this process

The invention relates to a method for obtaining synthesis gas by partial catalytic oxidation, consisting in bringing a hydrocarbon in a gaseous state into contact with an oxidizing gas, and therefore possibly a small amount of water vapor, in the presence of a catalyst comprising at least one silicon carbide at a temperature of more than 800&#xb0; C. According to the invention, the silicon carbide has a specific surface which is determined by the BET method and which is less than or equal to 100 m/g, the contact time between the mixture of gaseous hydrocarbon, oxidizing gas and silicon carbide being more than 0.05 seconds and the pressure inside the reactor being greater than atmospheric pressure.

Method for obtaining synthesis gas by partial catalytic oxidation

A catalyst for chemical and petrochemical reactions and a process for its production. The catalyst comprises an oxide of one of the transition metals, rare earth elements, or actinide elements, e.g., molybdenum, having on its surface carbides and oxycarbides, the core being the metal or the metal oxide. In the process for catalyst production, the reaction gas mixture containing carbon products is passed onto the oxide, leading to a progressive carburization of the surface of the oxide and to a progressive increase in the efficiency of the catalyst.

Preparation of a catalyst from metal oxides by reduction and partial

A method of producing heavy metal carbides of high specific surface area characterised in that a compound in the gazeous state of said heavy metal is caused to react with reactive carbon having a specific surface area at least equal to 200 m.sup.2.g.sup.-1 at a temperature comprised between 900.degree. and 1400.degree. C., and thus obtained carbides.

Production of heavy metal carbides of high specific surface area

Process for activating carbides of heavy metals with a large specific surface with a view to their use as a catalyst for chemical or petrochemical reactions consisting of treating the said carbides by managed oxidation under an oxidizing gas stream at a temperature between 250.degree. and 450.degree. C., maintaining the temperature for at least 3 hours and then cooling to ambient temperature, still under said oxidizing stream.

Process for activating the surface of carbides of heavy metals with a

The present invention relates to new catalysts for the hydrotreatment of hydrocarbons, their preparation and their application. The catalyst for the hydrotreatment of hydrocarbons, according to the present invention, incorporates a refractory inorganic support combined with an active phase comprising a layer of uranium oxide and at least one oxide of a Group VIII metal. The active phase comprises a layer of uranium oxide fixed with a homogenous distribution on the said support through the intermediacy of direct --O-- bonds resulting from an impregnation of the support with the aid of an ethanolic solution of uranyl acetylacetonate.

Catalysts for the hydrotreatment of hydrocarbons and their preparation

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Strasbourg, France

Marc-Jacques Ledoux