Texturized purification structure incorporating an...

B - Operations – Transporting – 01 – D

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B01D 53/94 (2006.01) B01D 53/56 (2006.01) B01D 53/62 (2006.01) B01J 35/04 (2006.01) B01J 35/10 (2006.01)

Patent

CA 2701391

A structure for the purification of a polluted gas comprising a porous matrix of an inorganic material, in the form of interconnected grains and an electrochemical system for the treatment of said gas, formed by a reduction catalyst A for reducing the polluting species of the NOx type, an oxidation catalyst B for oxidizing the polluting species of the hydrocarbon HC type or CO type, an electron-conductive compound C and an ion-conductive compound D, said structure being characterized in that the catalysts A and B are placed in the pores of the inorganic material, in that the grains and possibly the grain boundaries of the inorganic material constituting the matrix are covered over at least part of their surface with a texturizing material and in that said texturizing material is an ionic, electronic or ionic/electronic conductor and constitutes, respectively, the element C, the element D or the elements C and D of the electrochemical gas treatment system.

Structure pour la purification d'un gaz pollué comprenant une matrice poreuse d'un matériau inorganique, sous la forme de grains reliés les uns aux autres et un système électrochimique de traitement dudit gaz constitué par un catalyseur A de réduction des espèces polluantes du type NO., un catalyseur B d'oxydation des espèces polluantes du type hydrocarbures HC ou CO, un composé C conducteur électronique, un composé D conducteur ionique, ladite structure étant caractérisée en ce que les catalyseurs A et B sont disposés dans la porosité du matériau inorganique, en ce que les grains et éventuellement les joints de grains du matériau inorganique constituant la matrice sont recouverts sur au moins une partie de leur surface d'un matériau de texturation et en ce que ledit matériau de texturation est conducteur ionique, électronique ou ionique et électronique et constitue respectivement l'élément C, l'élément D ou les éléments C et D du système électrochimique de traitement des gaz.

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