Process for the elimination of impurities contained in a gaseous compound
AssigneeL'Air Liquide, Societe Anonyme pour l'Etude et l'Exploitation des Procedes Georges Claude
InventorDaniel Gary
Life of this patent
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Abstract
A process for the substantial elimination of at least one of the impurities carbon monoxide and hydrogen contained in a gaseous compound, according to which: (a) at least one of the impurities carbon monoxide and hydrogen contained in the gaseous compound is caused to react with oxygen, in contact with a catalyst comprising particles, on the one hand, (i) of gold, silver or gold and silver, and, on the other hand, (ii) of at least one metal of the platinum family, these particles being supported by a support to form, respectively, carbon dioxide and water; (b) as needed, the carbon dioxide and water are eliminated from the gaseous compound; (c) the gaseous compound is recovered substantially free from its impurities of carbon monoxide and/or hydrogen.
Claims15
Process for the substantial elimination of at least one of the impurities carbon monoxide and hydrogen contained in a gas, the process comprising:
- (a) reacting at least one of the impurities carbon monoxide and hydrogen contained in said gas with oxygen, in contact with a catalyst comprising particles of (i) a first member consisting of silver, and (ii) at least a second member selected from the group consisting of the platinum group metals wherein the particles are supported on a support consisting of titanium dioxide, to form respectively carbon dioxide and water from the catalytic oxidation of the carbon monoxide or hydrogen;
- wherein the temperature of the gas in contact with the catalyst is between 80.degree. and 130.degree. C., the weight ratio between the particles of the first member and the second member is between 90/10 and 10/90, and the weight content of the particles of the first member is between 0.1% and 5% relative to the total weight of the catalyst;
- (b) eliminating carbon dioxide and water from said reacted gas;
- and
- (c) recovering a purified gas which contains less than 5 ppb of carbon monoxide and less than 10 ppb of hydrogen impurities.
Process for the production of nitrogen substantially free from carbon monoxide and hydrogen impurities, from air, which comprises:
- (a) reacting at least one of the impurities carbon monoxide and hydrogen contained in the air with oxygen of the air, in contact with a catalyst comprising particles of (i) silver, and (ii) palladium, the particles being supported on a support consisting of titanium dioxide, so as to form respectively carbon dioxide and water from the catalytic oxidation of the carbon monoxide or hydrogen;
- wherein the temperature of the gas in contact with the catalyst is between 80.degree. and 130.degree. C., the weight ratio between the particles of the first member and the second member is between 90/10 and 10/90, and the weight content of the particles of the first member is between 0.1% and 5% relative to the total weight of the catalyst;
- (b) eliminating carbon dioxide and water from the air;
- (c) separating nitrogen from the oxygen of the air;
- and
- (d) recovering a high purity nitrogen which contains less than 5 ppb of carbon monoxide and less than 10 ppb of hydrogen impurities.
Dependencies are inferred from the claim text.