Centre National De La Recherche Scientifique

Université Louis Pasteur

Université Louis Pasteur De Strasbourg

Sicat

Entre National De La Recherche Scientifigue

Université Louis Pasteur, U.l.p.

Estelle Vanhaecke

Cuong Pham-Huu

Marc J Ledoux

Marc-Jacques Ledoux

Pierre Bernhardt

Charlotte Pham

Svetlana Ivanova

Marc Jacques Marie Ledoux

Laurie Pesant

Suzanne Libs

Michel Wolf

Michel Kartheuser

Benoit Louis

Marc LeDoux

A process for the preparation of dimethyl ether by catalytic dehydration of methanol, in which there is used a catalyst based on a zeolite immobilized on a silicon carbide support, for example a zeolite of type ZSM-5 supported on silicon carbide extrudates or on a silicon carbide cellular foam.

Dehydration of methanol to dimethyl ether using catalysts based on a zeolite supported on silicon carbide

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

Growing community of inventors

Strasbourg, France

Estelle Vanhaecke