Low temperature CO oxidation non-noble metal catalyst

A non-precious metal, catalyst technology, applied in the direction of metal/metal oxide/metal hydroxide catalyst, physical/chemical process catalyst, catalyst carrier, etc. It can solve the problems of complex function and pretreatment, and achieve the effects of convenient operation, low activation starting temperature and low cost

Inactive Publication Date: 2008-03-19
NO 63971 TROOPS PLA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage is that the pretreatment is more complicated, and at room temperature, it cannot play an effective role
However, if gold is supported on a single carrier Al 2 o 3 In general, supported gold catalysts...

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0021] Measure 5.36ml Cu(NO 3 ) 2 Solution (1mol / L), 8.04ml Mn(NO 3 ) 2 The solution (1mol / L) is poured into a separatory funnel, and 40ml of distilled water is added to dilute, and the solution is fully shaken to make a mixed solution. Take 20ml K 2 CO 3 Solution (1mol / L), pour it into a beaker, and add 60ml of distilled water to it for dilution. Slowly add the mixed solution dropwise to the alkaline solution at a rate of about 1 drop / s. While dripping, stir with constant temperature and magnetic force. The operation is carried out at room temperature. After the addition is complete, continue magnetic stirring at room temperature for 3 hours to allow the reaction to proceed fully. After the reaction was completed, the solution was allowed to stand for 3 hours. The product is washed, centrifuged, and dried at 80°C for 12 hours. Then in the air, the temperature is 250 ℃ baking 1h.

[0022] The raw material gas composition is CO: 1.5%, O2: 21%, N 2 : 78.5% (volume percentage), gas v...

example 2

[0024] Measure 2.68ml Co(NO 3 ) 3 Solution (1mol / L), 10.72ml Fe(NO 3 ) 3 , Pour into a separatory funnel, and add 40ml of distilled water to dilute, shake the solution thoroughly to make a mixed solution. Take 20ml Na 2 CO 3 Solution (1mol / L), pour it into a beaker, and add 60ml of distilled water to it for dilution. Slowly add the mixed solution dropwise to the alkali solution at a rate of about 1 drop / s. While dripping, stir at constant temperature and magnetically. The operation is carried out at room temperature. After the addition is complete, continue magnetic stirring at room temperature for 1 hour to allow the reaction to proceed fully. After the reaction is complete, the solution is allowed to stand for 5 hours. The product is washed, centrifuged, and dried at 80°C for 12 hours. Then in oxygen, the temperature is 450 ℃ roasting 0.5h.

[0025] When using the raw gas and gas volumetric space velocity described in Example 1, the catalyst catalyzes the complete conversion of ...

example 3

[0027] At 80℃, powdered alumina was added to the aqueous solution to make a suspension, and Co(NO 3 ) 3 Fully stir, add NaOH solution dropwise, adjust the pH value to 9, fully stir for 4 hours, aging for 16 hours, filter and wash, dry at 150 ℃, dry the product at 300 ℃, in situ in an oxygen atmosphere deal with.

[0028]When using the raw gas and gas volumetric space velocity described in Example 1, the catalyst catalyzes the complete conversion of CO to CO 2 The minimum allowable reaction temperature is below 43°C.

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PUM

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Abstract

The invention provides an oxidation catalyst to purify CO in room temperature, which is prepared in coprecipitation method or deposition-precipitation method. The catalyst consists of non precious metal active components and carrier, wherein the loading of the active components is 5 to 80 percent of the conversion value of metal element. The active components come from cobalt salt liquid, iron salt liquid, nickel salt liquid, manganese salt liquid, copper salt liquid, zinc salt liquid, tin salt liquid and cerium salt liquid. The carrier comes from alumina, silica, molecular sieve, honeycomb ceramics, wire fence, cobalt oxide, iron oxide, manganese oxide, copper oxide, zinc oxide, tin oxide and cerium oxide. The precipitant is Na2CO3, K2CO3, sodium hydroxide, urea or ammonia. The catalyst preparation solution needs to be fully stirred for 1 to 8 hours and the retrogradation duration is 1 to 16 hours. The dried solution needs to be treated in in-situ remediation in air, oxygen, and hydrogen or nitrogen atmosphere in temperature from 100 to 500 degrees centigrade. The catalyst disuses precious metal as active component, so the cost is low and the preparation process is simple.

Description

Technical field [0001] The present invention is a CO oxidation non-precious metal catalyst that can purify the environment at low or normal temperature, and is mainly used for coal mine self-rescuers, gas masks, high-rise building escape masks or devices for CO protection. 2 Laser, CO sensor and CO purification in a closed environment. Background technique [0002] The CO purification catalyst used for a long time in the past is Hopcalite. It was jointly invented by Johns Hopkins University and the University of California in 1919. It is a catalyst made of active manganese dioxide and copper oxide in a certain proportion. Usually Hopcalite catalyst is prepared by sulfuric acid method. The first step is to produce active manganese dioxide, which is to mix manganese sulfate fine powder (below 70 mesh) with a small amount of water, and add concentrated sulfuric acid under constant stirring to make manganese sulfate (suspension in 70% sulfuric acid). At a temperature of 60°C, add gra...

Claims

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Application Information

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IPC IPC(8): B01J23/70B01J32/00B01D53/62
CPCY02A50/20
Inventor 王东辉史喜成董同欣白书培程代云
Owner NO 63971 TROOPS PLA
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