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Precious metal catalyst for catalytic oxidation of CO and preparation method thereof

A precious metal catalyst, catalytic oxidation technology, applied in the field of environmental engineering, can solve the problems of low activation temperature, sulfur resistance and water resistance, low activation temperature, etc., to improve the service life, facilitate large-scale production and market promotion Applied, easily reproducible effects

Pending Publication Date: 2022-06-21
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the existing CO catalysts have a very low activation temperature, but the anti-sulfur and water resistance performance needs to be improved, and the activation temperature required for practical engineering applications is not very low, especially in the iron and steel industry, where the flue gas temperature is mostly 120 °C above

Method used

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  • Precious metal catalyst for catalytic oxidation of CO and preparation method thereof
  • Precious metal catalyst for catalytic oxidation of CO and preparation method thereof
  • Precious metal catalyst for catalytic oxidation of CO and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Weigh 27g of titanium dioxide, add 0.5g of chloroplatinic acid, pre-mix evenly, add the material into the ball mill jar, weigh 0.4g of tin protochloride, quickly add it into the ball mill jar, use a planetary ball mill, at 300r / Under the condition of rotating speed of min, ball mill clockwise for 20 minutes, then increase the rotating speed to 480r / min, and ball mill counterclockwise for 50 minutes. After the ball milling, take out the catalyst powder and roast it in a muffle furnace at 400°C for 2.5 hours. After the catalyst was cooled to room temperature, it was stored dry and sealed for use, and recorded as 1#.

Embodiment 2

[0026] Weigh 23.5g of titanium dioxide, add 0.5g of chloroplatinic acid, pre-mix evenly, add the materials into the ball mill jar, weigh 0.73g of stannous chloride and 0.025g of iron oxide, quickly add them into the ball mill jar, and use planetary Type ball mill, at the speed of 250r / min, mill clockwise for 35 minutes, then increase the speed to 520r / min, and mill counterclockwise for 35 minutes. Under roasting 2h. After the catalyst was cooled to room temperature, it was stored dry and sealed for use, and recorded as 2#.

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Abstract

The invention discloses a noble metal catalyst for catalytic oxidation of CO and a preparation method thereof, and belongs to the field of catalytic chemistry. One or more than two of noble metals Pt, Ag, Pd, Rh, Ir, Ru, Os or Au are loaded on the surface of anatase TiO2 by adopting a one-step mechanical ball milling method. And one or more than two auxiliary agents selected from Co, Cr, Zr, Sn, Mo, W, Fe, Ce, Ni, Nb and the like are added. The catalyst comprises the following components in percentage by weight: 78 to 98.9 percent of TiO2, 0.1 to 2 percent of noble metal and 1 to 20 percent of auxiliary agent. The catalyst can realize complete conversion of CO at about 140 DEG C, has good sulfur-resistant and water-resistant effects at about 180 DEG C in the presence of SO2 and H2O, and can maintain the catalytic effect at 95% or more after being continuously tested for about 60 hours.

Description

technical field [0001] The invention relates to a catalyst for catalytic oxidation of CO and a preparation method thereof, which can be used to remove CO in tail gas of sintering, coking, boilers, etc., recover reaction heat at the same time, realize efficient utilization of resources, and belong to the field of environmental engineering. Background technique [0002] With the progress of society and the development of industry, people pay more and more attention to the problem of environmental pollution. CO is one of the main pollutants in the atmosphere, and its control technology has attracted more and more attention. Catalytic oxidation is one of the effective methods to remove CO. At present, due to the complex composition of domestic industrial flue gas, SO 2 and H 2 The poisonous effect of O and other components on the catalyst seriously restricts the industrial application of catalytic oxidation technology to remove CO. So far, there is no mature catalyst suitable ...

Claims

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Application Information

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IPC IPC(8): B01J23/89B01J23/62B01D53/62B01D53/86
CPCB01J23/8966B01J23/626B01J23/002B01J37/0036B01D53/864B01J2523/00B01D2257/502B01D2258/06B01D2258/0283B01J2523/43B01J2523/47B01J2523/828B01J2523/842
Inventor 李坚蔡建宇赵靖强
Owner BEIJING UNIV OF TECH
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