CN101157039A - A catalyst for cleaning CO as well as its preparing method and application - Google Patents

A catalyst for cleaning CO as well as its preparing method and application Download PDF

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CN101157039A
CN101157039A CNA2007100473081A CN200710047308A CN101157039A CN 101157039 A CN101157039 A CN 101157039A CN A2007100473081 A CNA2007100473081 A CN A2007100473081A CN 200710047308 A CN200710047308 A CN 200710047308A CN 101157039 A CN101157039 A CN 101157039A
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catalyst
hours
salt
mesh sieves
inorganic oxide
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CN101157039B (en
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方晶晶
许林军
鲁毅钧
肖存杰
徐新宏
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Navy Medicine Research Institute of PLA
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Abstract

The invention relates to the catalyst technical field, in particular to catalyst used for clearing CO, and the preparation method and the application thereof. The invention discloses the catalyst for clearing CO under the low-temperature condition, and consists of the following components of the weight ratio by the molecular weight: 10 percent to 40 percent of CeO2 , 0.1 percent to 5 percent of Pd, and carrier surplus of porous inorganic oxide. The catalyst of the invention has remarkable elimination function to the CO with the certain concentration in the room temperature, and can instantly complete the degradation to the CO with the low concentration, and the effect can maintain 200 hours. Compared with the catalyst, the operation temperature of homogeneous catalyst is high, the making procedure is complex, and the price is expensive. The invention can simplify the making process of the catalyst, the energy consumption is reduced during making and operation, and the catalyst has higher economic value.

Description

A kind of Catalysts and its preparation method and application of removing CO
Technical field:
The present invention relates to catalyst technical field, be specifically related to a kind of Catalysts and its preparation method and application that is used to remove CO.
Background technology:
As everyone knows, CO is typically flammable, toxic compounds.It is colourless, tasteless, the gas that toxicity is big.CO combines with the hemoglobin of human body, weakens the oxygen carrying capacity of hemoglobin, infringement people's central nervous system.Reaction under the lower situation of concentration ratio is headache, feels sick.Be exposed to continuously in the high-concentration carbon monoxide, stupor even dead can appear in personnel.Content reaches at 12.5% o'clock in the air, meets fire and can blast; CO content is 2.0 * 10 in air -5During mol/L, the people will occur dizzy and the vomiting phenomenon within two hours; When content reaches 1.2%, meeting causing death in 1-3min.Combustion of fossil fuel, chemical industry and motor vehicle use and cause a large amount of CO dischargings, have now become serious environmental problem, have caused people's common concern.
The low temperature of CO (＜100 ℃) is eliminated all important use value in many aspects, at CO 2Aspects such as elimination harmful and the middle trace amounts of CO of closed system (as: aircraft, submarine, spacecraft etc.) fall in the purifying of gas, CO detection of gas modulator material, breath for gas purifier, CO breathing mask, tobacco in the laser instrument all important application prospects.Therefore realize CO at a lower temperature oxidation conversion become one of hot issue of catalyticing research.
Through the research of decades, the domestic multiple catalyst of having developed with CO catalytic oxidation under low temperature performance, major part is a noble metal catalyst, mainly contains catalyst such as Pt, Pd, Rh, Au.This class Preparation of catalysts method is a lot, and the catalyst activity that different preparation methods obtains is far from each other.Before 70 years, Langmuir is that scientific basic has been established in the oxidation of CO on Pd, utilizes noble metal catalyst such as Pd to be used for CO after the seventies more and more and purifies and transform.In addition, in all kinds of organic chemical reactionses as utilization such as hydrogenation, oxidative dehydrogenation, hydrocrack, coupling, hydrogen vinegar baseization, one-carbon chemical should in, Pd also is one of good catalyst.
Because the noble metal catalyst poor selectivity, the active temperature scope is narrow, and noble metal resource scarcity and costing an arm and a leg, and therefore is badly in need of developing a kind of mixed catalyst that can match in excellence or beauty with it.
Summary of the invention
The object of the invention provides Catalysts and its preparation method and its application of a kind of low temperature removing CO for solving the deficiency of existing CO catalytic oxidation under low temperature catalyst.
The invention discloses a kind of low temperature remove CO catalyst, form by the molecular weight weight ratio ingredient by following,
CeO 2 10％～40％；
Pd 0.1％～5％；
Porous inorganic oxide carrier surplus.
Described CeO 2Be held on the porous inorganic oxide carrier with the Pd load.
Described CeO 2Content be preferably 40%.
The content of described Pd is preferably 1%～2%.
Catalyst disclosed in this invention can be formed by the feedstock production of following weight ratio:
Porous inorganic oxide carrier 20%-70%
Ce salt 30%-80%
Pd salt 0.1%-15%.
In one embodiment, the raw material of each weight ratio is preferably:
Porous inorganic oxide carrier 30 as one kind %-60%
Ce salt 40%-70%
Pd salt 0.5%-10%.
In one embodiment, the raw material of each weight ratio most preferably is:
Porous inorganic oxide carrier 40%-50%
Ce salt 50%-60%
Pd salt 1%-5%.
Described porous inorganic oxide carrier can be alundum (Al, silica, zeolite, sepiolite, titanium dioxide, zirconium dioxide, zinc oxide, magnesia, tin ash one or more hopcalites or its composite oxides wherein.The Powdered or moulding of porous inorganic oxide carrier coccoid.The degree of grinding of aforesaid Powdered porous inorganic oxide carrier is 1～10 micron.
Described Ce salt is selected from nitrate, sulfate, carbonate, acetate, chloride or the fluoride etc. of Ce.
Described Pd salt is selected from nitrate, sulfate, carbonate, acetate, chloride or the fluoride etc. of Pd.
Catalyst of the present invention can adopt method preparations such as infusion process, sol-gal process, coprecipitation, metal vapors method, base exchange method, liquid phase grafting, biochemical process.As infusion process, concrete steps are:
A) the porous inorganic oxide carrier is immersed in the Ce saline solution, placed 24 hours, at 30-100 ℃ of dry 2-24 hour;
B) crushed after being dried is crossed 40 mesh sieves, puts into Muffle furnace 400-800 ℃ of roasting 2-8h;
C) take out pulverizing, cross 40 mesh sieves, again powder is immersed in the acid solution of Pd salt, placed 24 hours, at 30-100 ℃ of dry 2-24 hour;
D) crushed after being dried is crossed 20 mesh sieves, puts into Muffle furnace 400-800 ℃ of roasting 2-6h;
E) pass through H at 200-300 ℃ 2Reduced 1 hour, and at H 2In cool to room temperature progressively.
In this preparation method, step a) and c) optimum baking temperature is 70 ℃; The optimum sintering temperature of step b) is 400 ℃; The optimum sintering temperature of step d) is 600 ℃; The optimum temperature of step e) is 250 ℃.
Catalyst of the present invention is the optimization formula that obtains through repeated screening for many years, and palladium catalyst has good active to the oxidation of carbon monoxide and hydrocarbon.The present industrial CO combustion promoter that uses is to be active component with palladium greatly.The active order of all kinds of CO catalysts is: Pd＞Pt＞Cr 2O 3＞M n 2O 3＞CuO＞Fe 2O 3＞Ni, the Ba that study tour arranged abroad, Ce, element oxides such as Fe add in single palladium catalyst the influence to the carbon monoxide cleaning catalyst to.Oxidation Ce is to having tangible effect to catalyst low-temperature oxidation CO.Under excess oxygen, CO can very fast at a lower temperature whole conversions; Under the oxygen deprivation condition, the CO conversion ratio descends to some extent, and its conversion ratio improves with temperature and increases, but the CO conversion ratio descends again gradually during to uniform temperature.
Explanation for each constituent content of catalyst: CeO in this catalyst 2Content between 10% to 40%, with 40% good especially, if content has surpassed aforementioned proportion, the amount that surpasses so can not cause activity of such catalysts to increase in proportion yet.The content of Pd with 1%～2% good especially, causes this catalyst activity deficiency if contain quantity not sufficient 1% between 0.1% to 5%, on the contrary when this bullion content greater than 2%, the noble metal of overage can not cause activity of such catalysts to increase in proportion yet so.Must low temperature drying for the explanation of baking temperature, and in this process, will rock, otherwise active component can not well enter in the carrier, adhere to inhomogeneously, influence the performance of final catalyst.Sintering temperature is very big to the influence of catalyst performance, and it is the committed step of catalyst texture generation great change.Temperature is too high not only to waste energy, and makes sintering of catalyst easily.Temperature too low activity center can not form.Temperature should be controlled between 400～800 ℃, and is outstanding good with 600 ℃.Last catalyst reduction step is essential, and difference is obvious before and after the reduction, and the reduction back is active improves, and temperature is good with 250 ℃.
Result of the test shows that this catalyst has significant elimination effect to certain density CO in the room temperature, and to the instantaneous degraded fully of the CO energy of low concentration, and effect can keep 200 hours.And similar catalyst serviceability temperature height in contrast to this, the production process complexity costs an arm and a leg.This invention can be simplified the manufacture craft of such catalyst, reduces the energy consumption in making and the use.This invention is applicable to the aspects such as elimination of CO in resident's treating indoor air pollution, industry or medical gas purification, CO breathing mask and the closed system, has higher economic value.
The specific embodiment
Following embodiment is just in order to illustrate rather than limit the present invention, need not to further describe, can believe those skilled in the art can use above description and hereinafter the embodiment of property prepare and utilize among the present invention detected change and put into practice desired method.Therefore, following work embodiment has specifically described certain embodiments of the present invention, it can not be regarded as the restriction to all the other contents.
Embodiment 1
Weighing 21.7 gram Ce (NO 3) 2, be dissolved in the 50ml aqueous solution.Weighing 1.8 gram Al 2O 3Powder evenly drips Ce (NO 3) 2Aqueous solution 1.2ml places and spent the night in 24 hours, 70 ℃ of dryings 10 hours, rocks in the dry run.Crushed after being dried is crossed 40 mesh sieves, puts into 300 ℃ of roasting 3h of Muffle furnace.Take out and pulverize, cross 40 mesh sieves, standby.Weighing 21.7 gram PdCl 2, in rare HCl, be made into 50ml solution, evenly drip 1.74ml in the powder of preparation, place and spent the night in 24 hours, 70 ℃ of dryings 10 hours, rock in the dry run.Crushed after being dried is crossed 20 mesh sieves, puts into 300 ℃ of roasting 3h of Muffle furnace.Take out and pulverize, cross 20 mesh sieves.In the U type glass tube, two is blocked up with mineral wool, passes through H at 250 ℃ 2Reduced 1 hour, and at H 2In cool to room temperature progressively.Catalyst activity is listed in the subordinate list.
Embodiment 2
Catalyst preparation step is substantially the same manner as Example 1.Weighing 1.4 gram Al 2O 3Powder evenly drips Ce (NO 3) 2Aqueous solution 3.5ml places and spent the night in 24 hours, 120 ℃ of dryings 10 hours, rocks in the dry run.Crushed after being dried is crossed 40 mesh sieves, puts into 500 ℃ of roasting 3h of Muffle furnace.Take out and pulverize, cross 40 mesh sieves, standby.Evenly drip 1.74ml PdCl 2Hydrochloric acid solution in the powder of preparation, place and spent the night in 24 hours, 120 ℃ of dryings 10 hours, rock in the dry run.Crushed after being dried is crossed 20 mesh sieves, puts into 500 ℃ of roasting 3h of Muffle furnace.Take out and pulverize, cross 20 mesh sieves.In the U type glass tube, two is blocked up with mineral wool, passes through H at 250 ℃ 2Reduced 1 hour, and at H 2In cool to room temperature progressively.Catalyst activity is listed in the subordinate list.
Embodiment 3
Catalyst preparation step is substantially the same manner as Example 1.Weighing 1.6 gram Al 2O 3Powder evenly drips Ce (NO 3) 2Aqueous solution 2.3ml places and spent the night in 24 hours, 70 ℃ of dryings 10 hours, rocks in the dry run.Crushed after being dried is crossed 40 mesh sieves, puts into 500 ℃ of roasting 3h of Muffle furnace.Take out and pulverize, cross 40 mesh sieves, standby.Evenly drip 3.5ml PdCl 2Hydrochloric acid solution in the powder of preparation, place and spent the night in 24 hours, 70 ℃ of dryings 10 hours, rock in the dry run.Crushed after being dried is crossed 20 mesh sieves, puts into 500 ℃ of roasting 3h of Muffle furnace.Take out and pulverize, cross 20 mesh sieves.In the U type glass tube, two is blocked up with mineral wool, passes through H at 250 ℃ 2Reduced 1 hour, and at H 2In cool to room temperature progressively.Catalyst activity is listed in the subordinate list.
Embodiment 4
Catalyst preparation step is substantially the same manner as Example 1.Weighing 1.8 gram Al 2O 3Powder evenly drips Ce (NO 3) 2Aqueous solution 1.2ml places and spent the night in 24 hours, 70 ℃ of dryings 10 hours, rocks in the dry run.Crushed after being dried is crossed 40 mesh sieves, puts into 600 ℃ of roasting 3h of Muffle furnace.Take out and pulverize, cross 40 mesh sieves, standby.Evenly drip 3.5ml PdCl 2Hydrochloric acid solution in the powder of preparation, place and spent the night in 24 hours, 70 ℃ of dryings 10 hours, rock in the dry run.Crushed after being dried is crossed 20 mesh sieves, puts into 600 ℃ of roasting 3h of Muffle furnace.Take out and pulverize, cross 20 mesh sieves.In the U type glass tube, two is blocked up with mineral wool, passes through H at 250 ℃ 2Reduced 1 hour, and at H 2In cool to room temperature progressively.Catalyst activity is listed in the subordinate list.
Embodiment 5
Catalyst preparation step is substantially the same manner as Example 1.Weighing 1.4 gram Al 2O 3Powder evenly drips Ce (NO 3) 2Aqueous solution 3.5ml places and spent the night in 24 hours, 70 ℃ of dryings 10 hours, rocks in the dry run.Crushed after being dried is crossed 40 mesh sieves, puts into 400 ℃ of roasting 2h of Muffle furnace.Take out and pulverize, cross 40 mesh sieves, standby.Evenly drip 3.5ml PdCl 2Hydrochloric acid solution in the powder of preparation, place and spent the night in 24 hours, 70 ℃ of dryings 10 hours, rock in the dry run.Crushed after being dried is crossed 20 mesh sieves, puts into 400 ℃ of roasting 2h of Muffle furnace.Take out and pulverize, cross 20 mesh sieves.In the U type glass tube, two is blocked up with mineral wool, passes through H at 250 ℃ 2Reduced 1 hour, and at H 2In cool to room temperature progressively.Catalyst activity is listed in the subordinate list.
Embodiment 6
Catalyst preparation step is substantially the same manner as Example 1.Weighing 1.4 gram Al 2O 3Powder evenly drips Ce (NO 3) 2Aqueous solution 3.5ml places and spent the night in 24 hours, 100 ℃ of dryings 10 hours, rocks in the dry run.Crushed after being dried is crossed 40 mesh sieves, puts into 600 ℃ of roasting 3h of Muffle furnace.Take out and pulverize, cross 40 mesh sieves, standby.Even Dropwise 5 .3ml PdCl 2Hydrochloric acid solution in the powder of preparation, place and spent the night in 24 hours, 100 ℃ of dryings 10 hours, rock in the dry run.Crushed after being dried is crossed 20 mesh sieves, puts into 600 ℃ of roasting 3h of Muffle furnace.Take out and pulverize, cross 20 mesh sieves.In the U type glass tube, two is blocked up with mineral wool, passes through H at 250 ℃ 2Reduced 1 hour, and at H 2In cool to room temperature progressively.Catalyst activity is listed in the subordinate list.
Embodiment 7
Catalyst preparation step is substantially the same manner as Example 1.Weighing 1.2 gram Al 2O 3Powder evenly drips Ce (NO 3) 2Aqueous solution 4.7ml places and spent the night in 24 hours, 70 ℃ of dryings 10 hours, rocks in the dry run.Crushed after being dried is crossed 40 mesh sieves, puts into 500 ℃ of roasting 3h of Muffle furnace.Take out and pulverize, cross 40 mesh sieves, cross 40 mesh sieves, standby.Even Dropwise 5 .3mlPdCl 2Hydrochloric acid solution in the powder of preparation, place and spent the night in 24 hours, 70 ℃ of dryings 10 hours, rock in the dry run.Crushed after being dried is crossed 20 mesh sieves, puts into 500 ℃ of roasting 3h of Muffle furnace.Take out and pulverize, cross 20 mesh sieves.In the U type glass tube, two is blocked up with mineral wool, passes through H at 250 ℃ 2Reduced 1 hour, and at H 2In cool to room temperature progressively.Catalyst activity is listed in the subordinate list.
Embodiment 8
Catalyst preparation step is substantially the same manner as Example 1.Weighing 1.8 gram Al 2O 3Powder evenly drips Ce (NO 3) 2Aqueous solution 1.2ml places and spent the night in 24 hours, 90 ℃ of dryings 10 hours, rocks in the dry run.Crushed after being dried is crossed 40 mesh sieves, puts into 400 ℃ of roasting 2h of Muffle furnace.Take out and pulverize, cross 40 mesh sieves, cross 40 mesh sieves, standby.Even Dropwise 5 .3mlPdCl 2Hydrochloric acid solution in the powder of preparation, place and spent the night in 24 hours, 90 ℃ of dryings 10 hours, rock in the dry run.Crushed after being dried is crossed 20 mesh sieves, puts into 400 ℃ of roasting 2h of Muffle furnace.Take out and pulverize, cross 20 mesh sieves.In the U type glass tube, two is blocked up with mineral wool, passes through H at 250 ℃ 2Reduced 1 hour, and at H 2In cool to room temperature progressively.Catalyst activity is listed in the subordinate list.
Embodiment 9
Catalyst preparation step is substantially the same manner as Example 1.Weighing 1.6 gram Al 2O 3Powder evenly drips Ce (NO 3) 2Aqueous solution 2.3ml places and spent the night in 24 hours, 70 ℃ of dryings 10 hours, rocks in the dry run.Crushed after being dried is crossed 40 mesh sieves, puts into 300 ℃ of roasting 3h of Muffle furnace.Take out and pulverize, cross 40 mesh sieves, cross 40 mesh sieves, standby.Even Dropwise 5 .3mlPdCl 2Hydrochloric acid solution in the powder of preparation, place and spent the night in 24 hours, 70 ℃ of dryings 10 hours, rock in the dry run.Crushed after being dried is crossed 20 mesh sieves, puts into 300 ℃ of roasting 3h of Muffle furnace.Take out and pulverize, cross 20 mesh sieves.In the U type glass tube, two is blocked up with mineral wool, passes through H at 250 ℃ 2Reduced 1 hour, and at H 2In cool to room temperature progressively.Catalyst activity is listed in the subordinate list.
Embodiment 10
Catalyst preparation step is substantially the same manner as Example 1.Weighing 1.2 gram Al 2O 3Powder evenly drips Ce (NO 3) 2Aqueous solution 4.7ml places and spent the night in 24 hours, 70 ℃ of dryings 10 hours, rocks in the dry run.Crushed after being dried is crossed 40 mesh sieves, puts into 400 ℃ of roasting 2h of Muffle furnace.Take out and pulverize, cross 40 mesh sieves, cross 40 mesh sieves, standby.Evenly drip 7mlPdCl 2Hydrochloric acid solution in the powder of preparation, place and spent the night in 24 hours, 70 ℃ of dryings 10 hours, rock in the dry run.Crushed after being dried is crossed 20 mesh sieves, puts into 400 ℃ of roasting 2h of Muffle furnace.Take out and pulverize, cross 20 mesh sieves.In the U type glass tube, two is blocked up with mineral wool, passes through H at 250 ℃ 2Reduced 1 hour, and at H 2In cool to room temperature progressively.Catalyst activity is listed in the subordinate list.
Embodiment 11
Catalyst preparation step is substantially the same manner as Example 1.Weighing 1.4 gram Al 2O 3Powder evenly drips Ce (NO 3) 2Aqueous solution 3.5ml places and spent the night in 24 hours, 70 ℃ of dryings 10 hours, rocks in the dry run.Crushed after being dried is crossed 40 mesh sieves, puts into 300 ℃ of roasting 3h of Muffle furnace.Take out and pulverize, cross 40 mesh sieves, standby.Evenly drip 7ml PdCl 2Hydrochloric acid solution in the powder of preparation, place and spent the night in 24 hours, 70 ℃ of dryings 10 hours, rock in the dry run.Crushed after being dried is crossed 20 mesh sieves, puts into 300 ℃ of roasting 3h of Muffle furnace.Take out and pulverize, cross 20 mesh sieves.In the U type glass tube, two is blocked up with mineral wool, passes through H at 250 ℃ 2Reduced 1 hour, and at H 2In cool to room temperature progressively.Catalyst activity is listed in the subordinate list.
Embodiment 12
Catalyst preparation step is substantially the same manner as Example 1.Weighing 1.6 gram Al 2O 3Powder evenly drips Ce (NO 3) 2Aqueous solution 2.3ml places and spent the night in 24 hours, 70 ℃ of dryings 10 hours, rocks in the dry run.Crushed after being dried is crossed 40 mesh sieves, puts into 600 ℃ of roasting 3h of Muffle furnace.Take out and pulverize, cross 40 mesh sieves, standby.Evenly drip 7ml PdCl 2Hydrochloric acid solution in the powder of preparation, place and spent the night in 24 hours, 70 ℃ of dryings 10 hours, rock in the dry run.Crushed after being dried is crossed 20 mesh sieves, puts into 600 ℃ of roasting 3h of Muffle furnace.Take out and pulverize, cross 20 mesh sieves.In the U type glass tube, two is blocked up with mineral wool, passes through H at 250 ℃ 2Reduced 1 hour, and at H 2In cool to room temperature progressively.Catalyst activity is listed in the subordinate list.
Subordinate list: catalyst synthesis condition and activity
Experimental example number Each constituent mass percentage composition % Preparation section CO activity index (30 ℃)
Pd CeO 2 Al 2O 3 Dry Roasting CO average conversion (12 hour) 100%
1 2 3 4 5 6 7 1 1 2 2 2 3 3 10 30 20 10 30 30 40 89 69 78 88 68 67 57 70 ℃, 10 hours 120 ℃, 10 hours 70 ℃, 10 hours 70 ℃, 10 hours 70 ℃, 10 hours 100 ℃, 10 hours 70 ℃, 10 hours 300 ℃, 3 hours 500 ℃, 3 hours 500 ℃, 3 hours 600 ℃, 3 hours 400 ℃, 2 hours 600 ℃, 3 hours 500 ℃, 3 hours 0.56818 0.70202 0.98990 1 0.76721 0.91565 1
8 9 10 11 12 3 3 4 4 4 10 20 40 30 20 87 77 56 66 76 90 ℃, 10 hours 70 ℃, 10 hours 70 ℃, 10 hours 70 ℃, 10 hours 70 ℃, 10 hours 400 ℃, 2 hours 300 ℃, 3 hours 400 ℃, 2 hours 300 ℃, 3 hours 600 ℃, 3 hours 0.80303 0.51515 1 0.99748 1
Scope of the present invention is not subjected to the restriction of described specific embodiments, and described embodiment is only desired also to comprise the method and the component of functional equivalent in the scope of the invention as the single example of illustrating various aspects of the present invention.In fact, except content as herein described, those skilled in the art can easily grasp multiple improvement of the present invention with reference to above description and accompanying drawing.Described improvement also falls within the scope of appended claims.Every piece of list of references mentioned above is listed this paper in as a reference all in full.

Claims (17)

  1. A low temperature remove CO catalyst, form by element or molecular weight weight ratio ingredient by following,
    CeO 2 10％～40％；
    Pd 0.1％～5％；
    Porous inorganic oxide carrier surplus.
  2. 2. catalyst according to claim 1 is characterized in that described CeO 2Content be 40%.
  3. 3. catalyst according to claim 1 and 2, the content that it is characterized in that described Pd is 1%～2%.
  4. 4. catalyst as claimed in claim 1 can be formed by the feedstock production of following weight ratio:
    Porous inorganic oxide carrier 20%-70%
    Ce salt 30%-80%
    Pd salt 0.1%-15%.
  5. 5. catalyst according to claim 4 is characterized in that the raw material of described each weight ratio is:
    Porous inorganic oxide carrier 30 as one kind %-60%
    Ce salt 40%-70%
    Pd salt 0.5%-10%.
  6. 6. catalyst according to claim 4 is characterized in that the raw material of described each weight ratio is:
    Porous inorganic oxide carrier 40%-50%
    Ce salt 50%-60%
    Pd salt 1%-5%.
  7. 7. according to each described catalyst of claim 4-6, it is characterized in that described Ce salt is selected from the nitrate of Ce, sulfate, carbonate, acetate, chloride or fluoride.
  8. 8. according to each described catalyst of claim 4-6, it is characterized in that described Pd salt is selected from the nitrate of Pd, sulfate, carbonate, acetate, chloride or fluoride.
  9. 9. according to claim 1 or 4 described catalyst, but it is characterized in that described porous inorganic oxide carrier alundum (Al, silica, zeolite, sepiolite, titanium dioxide, zirconium dioxide, zinc oxide, magnesia, tin ash one or more hopcalites or its composite oxides wherein.
  10. 10. catalyst according to claim 9 is characterized in that described porous inorganic oxide carrier can be the coccoid of Powdered or moulding.
  11. 11. catalyst according to claim 10, the degree of grinding that it is characterized in that described Powdered porous inorganic oxide carrier is 1～10 micron.
  12. 12. Preparation of catalysts method according to claim 1 comprises the following steps to be:
    F) the porous inorganic oxide carrier is immersed in the Ce saline solution, placed 24 hours, at 30-100 ℃ of dry 2-24 hour;
    G) crushed after being dried is crossed 40 mesh sieves, puts into Muffle furnace 400-800 ℃ of roasting 2-8h;
    H) take out pulverizing, cross 40 mesh sieves, again powder is immersed in the acid solution of Pd salt, placed 24 hours, at 30-100 ℃ of dry 2-24 hour;
    I) crushed after being dried is crossed 20 mesh sieves, puts into Muffle furnace 400-800 ℃ of roasting 2-6h; Pass through H at 200-300 ℃ 2Reduced 1 hour, and at H 2In cool to room temperature progressively.
  13. 13., it is characterized in that step a) and c according to the described preparation method of claim claim 12) in baking temperature be 70 ℃.
  14. 14., it is characterized in that sintering temperature is 400 ℃ in the step b) according to the described preparation method of claim claim 12.
  15. 15., it is characterized in that sintering temperature is 600 ℃ in the step d) according to the described preparation method of claim claim 12.
  16. 16., it is characterized in that temperature is 250 ℃ in the step e) according to the described preparation method of claim claim 12.
  17. 17. each described catalyst of claim 1-6 application that CO eliminates in treating indoor air pollution, industry or medical gas purification, CO breathing mask and closed system.
CN2007100473081A 2007-10-22 2007-10-22 Application of a catalyst for cleaning CO as well as its preparing method Expired - Fee Related CN101157039B (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103922872A (en) * 2014-03-15 2014-07-16 南京理工大学 Activator and application of same in preparation of modified barium nitrate
CN105473221A (en) * 2013-08-23 2016-04-06 巴斯夫公司 Catalysts for oxidation of carbon monoxide and/or volatile organic compounds
CN112295554A (en) * 2020-11-13 2021-02-02 中国科学技术大学 Catalytic combustion catalyst, preparation method and application thereof

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105473221A (en) * 2013-08-23 2016-04-06 巴斯夫公司 Catalysts for oxidation of carbon monoxide and/or volatile organic compounds
CN103922872A (en) * 2014-03-15 2014-07-16 南京理工大学 Activator and application of same in preparation of modified barium nitrate
CN112295554A (en) * 2020-11-13 2021-02-02 中国科学技术大学 Catalytic combustion catalyst, preparation method and application thereof
CN112295554B (en) * 2020-11-13 2022-03-01 中国科学技术大学 Catalytic combustion catalyst, preparation method and application thereof

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