Institut Francais Du Pe'trole

Gil Mabilon

Daniel Durand

Patrick Bourges

Isabelle Guibard

Thierry Becue

Philippe Villeret

Eric Benazzi

Philippe Courty

Avelino Corma Canos

Patrick Euzen

Sylvie Lacombe

Michel Prigent

Brigitte Martin

Mathias Bouchez

Stephane Rebours

Eric Tocque

Patrice Marecot

Nicolas Des Courtils

Jean-Francois Le Page

Denis Uzio

Jean-Paul Bournonville

Samuel Mignard

Jean-Pierre Candy

Matthias Bouchez

Maria Jose Diaz Cabanas

Richard Doziere

Joaquin Martinez Triguero

Miguel Angel Camblor Fernandez

Maria Sol Grande Casas

Herve Caufriez

Catherine Especel

Florence Epron

Jacques Barbier

Paul Mouchot

A catalyst comprising at least one porous support, at least some platinum, and at least a second group VIII metal which is different from platinum and iridium, said catalyst having been prepared in accordance with a process comprising a) impregnation of the support with at least one solution containing a platinum precursor, b) activation in a neutral or oxidizing atmosphere, at a temperature of between 120 and 800&#xb0; C., c) activation in a reducing medium, at a temperature of between 0 and 800&#xb0; C., d1) impregnation with an aqueous solution and d2) treatment with at least one hydrogen donor compound, at a temperature of less than 200&#xb0; C., e) the impregnation of the support, which has already been impregnated with the platinum, with at least one solution containing a precursor of said second group VIII metal, and f) activation in a neutral, reducing, or oxidizing atmosphere, at a temperature of between 100 and 800&#xb0; C.

Platinum-based, bimetallic catalyst, and a second group VIII metal used for the opening of cyclic compounds

The invention concerns materials for eliminating oxides of nitrogen NO and NO present in exhaust gases, in particular from the internal combustion engines of automotive vehicles operating in a medium that is super-stoichiometric in oxidizing agents, which can adsorb oxides of nitrogen then desorb the oxides of nitrogen by elevating the temperature with respect to the adsorption temperature or by passage of a rich mixture, the materials comprising mixed oxides the metals of which are in octahedral co-ordination, with the octahedra connecting together so that the structure generates micropores in the form of channels. The channel width of the materials is such that the sides are composed of 2 and/or 3 octahedra. These materials adsorb oxides of nitrogen by insertion and do not become poisoned in contact with oxides of sulfur and carbon contained in the gases. In the presence of a group VIII metal or another suitable element such as iron, zinc or aluminum, these materials are capable of eliminating oxides of nitrogen adsorbed by reduction during passage of a rich mixture.

Material with a channel structure for eliminating oxides of nitrogen

The invention concerns materials for eliminating oxides of nitrogen NO and NO present in exhaust gases, in particular from the internal combustion engines of automotive vehicles operating in a medium which is super-stoichiometric in oxidising agents, which can adsorb oxides of nitrogen then desorb the oxides of nitrogen by elevating the temperature with respect to the adsorption temperature or by passage of rich mixture, said materials comprising mixed oxides the metals of which are in octahedral coordination, with the octahedra connecting together so that the structure generates micropores in the form of channels. These materials adsorb oxides of nitrogen by insertion and do not become poisoned in contact with oxides of sulphur and carbon contained in the gases. In the presence of a group VIII metal, these materials are capable of eliminating oxides of nitrogen absorded by reduction during passage of a rich mixture.

Process for eliminating oxides of nitrogen

Process and device intended for nitrogen oxides elimination in an exhaust line of an internal-combustion engine

Process for adsorbing and desording oxides of nitrogen

An IM-5 zeolite that is modified by adding phosphorus that is optionally dealuminified, preferably in aluminosilicic form, and that contains at most 10% by weight of phosphorus, a composition that contains it, its processes for preparation and its application to catalytic cracking of hydrocarbon feedstocks are described.

IM-5 phosphorus zeolite, catalytic composition, its preparation and its use in catalytic cracking

Combustion catalyst and combustion process using such a catalyst

Process for reducing emissions of oxides of nitrogen in a medium which is super-stoichiometric in oxidizing agents

The present invention provides a process for reducing oxides of nitrogen to molecular nitrogen in a medium which is superstoichiometric in oxidizing agent using reducing agents in the presence of a catalyst comprising:

Process and catalyst comprising at least one EU-1 and/or NU-86 and/or

A phosphorous-containing zeolite with structural type CON in its aluminosilicate or borosilicate form contains at most 10% by weight of phosphorous. A process for its preparation is described, starting from existing zeolites (SSZ-26, SSZ-33 or CIT-1) or from beta zeolites and an organic structuring agent or template which is 1-N,N,N-trimethyl adamantammonium hydroxide or 2-N,N,N-trimethyl adamantammonium hydroxide. The zeolite is used for catalytic cracking of hydrocarbon feeds.

Phosphorous-containing zeolite with structural type CON, its preparation

The invention involves the production of a catalyst that contains (1) at least one refractory inorganic oxide support, (2) at least one iron oxide, and (3) at least one cerium oxide, (4) at least one metal A, for example, from Groups VIB, VIIB, VIII, and IB of the Periodic System and, optionally (5) at least one compound of metal B, for example, from Groups IA, IIA, the rare-earths group, and Group IVB of the Periodic System, deposited in the form of a porous layer ('washcoat') on a ceramic or metal substrate:

Process for preparing a catalyst suitable for the treatment of exhaust

Processes for the catalytic combustion of hydrocarbons, carbon monoxide, hydrogen, or mixtures thereof (processes with one or more catalytic stages) and processes of abating the pollution produced by the exhaust gases of vehicles that run on natural gas using a non-selective oxidation catalyst. The non-selective oxidation catalyst comprises a monolithic substrate, a porous support with a refractory inorganic oxide base and an active phase that consists of cerium, zirconium, iron, and at least one metal that is selected from the group that is formed by palladium and platinum is described; with the porous support content being between 200 and 400 g per liter of catalyst; with the cerium content being between 0.3 and 20% by weight relative to the porous support; with the zirconium content being between 0.3 and 20% by weight relative to the porous support; with the iron content being between 0.01 and 3.5% of iron by weight relative to the porous support; and with the palladium and/or platinum content being higher than 3 g per liter of catalyst.

Process for catalytic combustion of a fuel in the presence of a

A catalyst which is active and selective for the reduction of nitrogen oxides to molecular nitrogen by reducing agents in a medium which is superstoichiometric in oxidizing agents such as carbon monoxide, hydrogen, hydrocarbons, alcohols and other oxygen-containing organic compounds. The active phase of this catalyst is as follows:

Catalysts selective for the reduction of nitrogen oxides to nitrogen in

Described is catalyst that is active and selective for reducing to molecular nitrous oxides contained in a superstoichiometric medium of oxidizing agents, said reduction being conducted with agents such as carbon monoxide, hydrogen, hydrocarbons, alcohols, ethers, and other oxidized organic compounds and also with ordinary fuels such as gasolines, gas oils, liquefied gases, and compressed natural gases, whereby said catalyst comprises:

Catalysts for reducing nitrogen oxides to molecular nitrogen in a

A production process for supported catalysts is described comprising:

Production process for catalysts on supports including a centrifuging

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Carrieres sur Seine, France

Gil Mabilon