 技術摘要： |
The preparation of bimetallic gold-silver cerium dioxide-supported catalysts and the process of oxidation of carbon monoxide (CO) in air to remove CO using the gold-silver cerium dioxide-supported catalysts are disclosed. The gold loading is between 0.5 and 5 wt. %. Gold and silver particle sizes are between 1 and 3 nm, and Au/Ag weight ratio is between 1 and 10. Oxidation of CO in air over these catalysts is carried out in a fixed bed reactor to remove CO.本發明揭示一種製備將奈米金及銀承載於二氧化鈰之觸媒方法，及一種在奈米金及銀承載於二氧化鈰之觸媒催化下，在空氣中一氧化碳與氧氣反應以去除一氧化碳之方法；其中金重量百分比是介於0.5%至5%，金及銀係依不同重量比例混合，金/銀重量比為0.1與1之間，承載之金和銀顆粒直徑為1與3奈米之間。本發明以含有金-銀/二氧化鈰觸媒在一氧化碳於空氣中，使用填充床反應器，以去除一氧化碳。
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| 解決的問題或達成的功效： |
The present invention discloses a preparation method of nano-gold-silver cerium dioxide-supported catalysts and a process of oxidation of carbon monoxide (CO) in air to remove CO using the nano-gold-silver cerium dioxide-supported catalysts. The gold loading is between 0.5 and 5 wt. %. Gold and silver particle sizes are between 1 and 3 nm, and Au/Ag weight ratio is between 1 and 10. Oxidation of CO in air over the gold-silver cerium dioxide-supported catalysts is carried out in a fixed bed reactor to remove CO. The present invention is benefit in less gold required, and the addition of silver can provide high activity.
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| 應用領域： |
The present invention discloses a preparation method of nano-gold-silver cerium dioxide-supported catalysts and a process of oxidation of carbon monoxide (CO) in air to remove CO using the nano-gold-silver cerium dioxide-supported catalysts. The gold loading is between 0.5 and 5 wt. %. Gold and silver particle sizes are between 1 and 3 nm, and Au/Ag weight ratio is between 1 and 10. Oxidation of CO in air over these catalysts is carried out in a fixed bed reactor to remove CO.
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| 適用產品： |
二氧化鈰觸媒
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| IPC： |
B01J-023/66(2006.01);B01J-037/03(2006.01);B01J-037/04(2006.01);B01J-037/06(2006.01);B01J-037/08(2006.01);B01D-053/86(2006.01);B01D-053/62(2006.01)
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| Claim 1： |
1. A preparation method of nano-gold-silver cerium dioxide-supported catalysts, comprising the steps of: preparing gold-silver cerium dioxide-supported catalysts by a deposition-precipitation method, wherein gold/silver weight ratio is between 1 and 10, the gold loading is between 0.5 and 5 wt. %, and the preparation method is characterized in: mixing a silver nitrate solution and cerium dioxide (CeO.sub.2) by a deposition-precipitation method; stirring the mixture solution at a temperature between 50.degree. C. and 80.degree. C. for 2-8 hours; dropping a HAuCl.sub.4 solution in the mixture solution by a deposition-precipitation method; adding ammonia water into the mixture solution to control the pH value thereof between 5 and 9; stirring the mixture solution at a temperature between 50.degree. C. and 80.degree. C. for 1-10 hours; washing by distilled water at a temperature between 50.degree. C. and 80.degree. C.; drying at a temperature between 50.degree. C. and 150.degree. C. for 8-24 hours; and calcining between 120.degree. C. and 240.degree. C. for 2-8 hours; wherein the diameter of the supported gold and silver particles is between 1 and 3 nanometers.
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