Low-temperature ammonia selective oxidation catalyst

A catalytic oxidation and catalyst technology, applied in physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, inorganic chemistry, etc., can solve the problems of poor selectivity, low temperature window, high temperature window, etc. Achieve the effect of simple preparation process, convenient operation and stable activity
CN101554587AActive Publication Date: 2009-10-14RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
Publication Date
2009-10-14

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Abstract

The invention provides a low-temperature ammonia selective oxidation catalyst which is used for eliminating ammonia gas pollution generated in the field of industry, agriculture, traffic, architecture, and the like, and selectively catalyzing and oxidizing the ammonia into pollution-free nitrogen and water under lower temperature. The oxidation catalyst can completely convert the ammonia under the temperature above 160 DEG C, and has the nitrogen selectivity of nearly 80 percent, good low-temperature oxidbillity, high catalytic efficiency and high stability. The oxidation catalyst contains porous inorganic oxide carrier, silver as an active component and cerium as an accessory ingredient, wherein the porous inorganic oxide carrier can be silicon dioxide, aluminium oxide, zirconia, lanthana, zinc oxide or titanium dioxide or the mixture of more than one of the oxide; the active component is formed by loading silver which a metal element with the weight conversion value of 1-15 percent on the inorganic oxide carrier; and the accessory ingredient is formed by simultaneously loading cerium and silver with the metal element weight conversion value of 5-50 percent on the inorganic oxide carrier.
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Description

technical field

[0001] The invention relates to a catalyst for eliminating ammonia pollution produced in processes such as industry, agriculture, transportation and construction, and selectively catalytically oxidizing ammonia into pollution-free nitrogen and water. When the oxidation catalyst is above 160 DEG C, the conversion rate of ammonia reaches 100%, and the nitrogen selectivity is close to 80%, which can effectively reduce the energy consumption in the process of eliminating ammonia pollution. technical background

[0002] Ammonia pollution comes from a wide range of sources, including industrial sources (tail gas emissions during the production of liquid ammonia, ammonia leakage from ammonia selective reduction of nitrogen oxides); agricultural and animal husbandry sources; and concrete admixtures added in construction , wooden boards, interior decoration materials, indoor ammonia pollution caused by human and animal metabolites, etc. A low concentration of ammonia...

Claims

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