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AssigneesCentre National De La Recherche Scientifique, Universite Blaise Pascal-Clermont-Ferrand II
InventorsAlain Pauly, Marc Dubois, Katia Guerin, André Hamwi, Jérôme Brunet, Christelle Varenne, Bernard Lauron
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The invention relates to the use of carbon nanomaterials as a filtration material pervious to nitrogen dioxide and impervious to ozone. The invention also relates to the use of carbon nanomaterials having a specific surface, measured by the BET method, of 15 to 40 m2/g inclusive and a form factor, equal to the ratio (highest dimension/lowest dimension) of the nanomaterial, of 5 to 250 inclusive, as material for filtering a gas mixture containing nitrogen dioxide and ozone, being pervious to the nitrogen dioxide and impervious to the ozone. The invention can be used in the field of air pollution.
A method for filtration of a gas mixture containing nitrogen dioxide and ozone comprising filtering the gas mixture through carbon nanomaterials having:
A system for selective detection and/or quantification of nitrogen dioxide in a gas mixture containing nitrogen dioxide and ozone, of the type comprising a resistive gas sensor based on a thin film of organic semiconductor which reacts with nitrogen dioxide and ozone, characterized in that it comprises, upstream of said sensor, a device for filtration of said gas mixture comprising carbon nanomaterials having a specific surface, measured by BET, of between 15 and 40 m2/g inclusive and a form factor equal to the ratio (largest dimension/smallest dimension) of said nanomaterial of between 5 and 250 inclusive.
A method for selective detection and/or quantification of nitrogen dioxide in a gas mixture containing nitrogen dioxide and ozone, of the type comprising passage of said gas mixture through a filter, then of the filtered gas over a resistive gas sensor based on a thin film of organic semiconductor which reacts with nitrogen dioxide and ozone, characterized in that it comprises passage of the gas mixture through a filter containing carbon nanomaterials having a specific surface, measured by BET, of between 15 and 40 m2/g inclusive and a form factor equal to the ratio (largest dimension/smallest dimension of between 5 and 250 inclusive.
Dependencies are inferred from the claim text.