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Rare-earth perovskite type catalyst for treating industrial waste gas as well as preparation method and application thereof

A technology of industrial waste gas and rare earth calcium, which is applied in the field of air pollution control technology and environmental protection catalytic materials, can solve the problems of poor catalytic combustion effect of VOCs, poor general practical performance, and poor anti-toxin ability, so as to facilitate the expansion of reproduction and active temperature window Wide, Inexpensive Effects

Active Publication Date: 2012-06-27
南京盈博环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Chinese patent CN101439290A relates to a perovskite catalyst for purifying organic waste gas and its preparation method. Lanthanum, strontium, cobalt and manganese mixed oxides are loaded on the coated cordierite carrier at one time. The catalyst has high catalytic efficiency and preparation Simple, low cost and easy to promote, but the catalyst is easily deactivated by reduction of reducing gas (CO) in industrial waste gas
Chinese patent CN1243768A discloses a CO catalytic combustion catalyst and its preparation method. Although the catalyst has a high CO catalytic combustion conversion efficiency, its catalytic combustion effect on VOCs is poor, and a relatively high content of precious metal elements is required. Not only It is expensive, and has the disadvantages of poor anti-toxicity and poor general practical performance. In addition, the waste catalyst needs special solid waste treatment

Method used

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  • Rare-earth perovskite type catalyst for treating industrial waste gas as well as preparation method and application thereof
  • Rare-earth perovskite type catalyst for treating industrial waste gas as well as preparation method and application thereof
  • Rare-earth perovskite type catalyst for treating industrial waste gas as well as preparation method and application thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] (1) Preparation of self-made cordierite carrier

[0036] Take 30g of silicon oxide, 40g of aluminum oxide and 30g of magnesium oxide and mix evenly. The mixture is put into a muffle furnace and roasted at 1300°C. Boil and keep warm on electric furnace for 2 h, drying temperature is 80°C, drying time is 2 h, then put into muffle furnace for roasting at 400°C, keep warm for 6h and then cool in furnace to obtain self-made cordierite carrier;

[0037] (2) Preparation of active component impregnation solution

[0038] First prepare the aqueous solution of lanthanum oxalate, calcium nitrate, cobalt oxalate, and manganese oxalate, then add the complexing agent citric acid solution, and heat it in a constant temperature water bath at 90°C until the water sol is obtained, which is the impregnation solution; the final concentration of La and Ca in the impregnation solution The molar ratio is 0.1:0.9, and the molar ratio of B-site elements Co and Mn is 0.3:0.7, that is, La 0.1 ...

Embodiment 2

[0043] (1) Preparation of self-made cordierite carrier

[0044] Take 40g of silicon oxide, 30g of aluminum oxide and 30g of magnesium oxide and mix evenly. The mixture is put into a muffle furnace and roasted at 1400°C. Boil in an electric furnace and hold for 2 h, dry at 80°C, and dry for 2 h, then bake in a muffle furnace at 400°C, hold for 6 h and then cool in the furnace to obtain a self-made cordierite carrier;

[0045] (2) Preparation of active component impregnation solution

[0046] First prepare the aqueous solution of lanthanum nitrate, barium nitrate, cobalt nitrate, and ferric nitrate, then add the complexing agent ammonium citrate solution, and heat it in a constant temperature water bath at 90°C until the water sol is obtained, which is the impregnating liquid; the final impregnating liquid La, Ba The molar ratio of Co and Fe is 0.3:0.7, and the molar ratio of Co and Fe is 0.1:0.9, that is, La 0.3 Ba 0.7 co 0.1 Fe 0.9 o 3 . The molar ratio of La, Ba total ...

Embodiment 3

[0051] (1) Preparation of self-made cordierite carrier

[0052] Take 55g of silicon oxide, 20g of aluminum oxide and 25g of magnesium oxide and mix evenly. The mixture is put into a muffle furnace, roasted at 1400 ° C, kept for 4 hours, cooled in the furnace, and then modified by an acetic acid solution with a mass concentration of 20%. Boil in an electric furnace and hold for 3 h, dry at 120°C, and dry for 1 h; put it into a muffle furnace for calcination at 600°C, hold for 4 h and cool in the furnace to obtain a self-made cordierite carrier;

[0053] (2) Preparation of active component impregnation solution

[0054] First prepare the aqueous solution of lanthanum acetate, calcium nitrate, cobalt acetate and nickel acetate, then add the complexing agent citric acid solution, heat in a 90°C constant temperature water bath until the water sol is obtained, which is the impregnation solution; the final concentration of La and Ca in the impregnation solution The molar ratio is 0....

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Abstract

The invention relates to a rare-earth perovskite type catalyst for treating industrial waste gas as well as a preparation method and application thereof, which belong to the fields of a treating technology of atmospheric pollution and an environment-friendly catalyzing material. According to the catalyst, rare-earth perovskite type oxide ABO3 is used as an active component, an adopted vector is ahome-made cordierite vector or a vector of a natural inorganic material, the mass of the vector is used as a reference, and the mass percent content of the loading quantity of the active component is5 to 20 percent. In the active component of the rare-earth perovskite type oxide ABO3, A bit elements are La and M, B bit elements are Co and N, and the general formula is LaxM1-xCoyN1-yO3 (M=Ba and Ca; N=Mn, Fe and Ni), wherein x is not smaller than 0.1 and not greater than 1, and y is not smaller than 0.1 and not greater than 1; and moreover, the mol ratio of the A bit elements of the La and the M is x:1-x, and the mol ratio of the B bit elements of the Co and the N is y:1-y. The catalyst is used for the processing of chemical engineering, electronics, medicine, paint and new materials and the catalytic treating of industrial waste gas discharged in the production process of the automobile industry.

Description

technical field [0001] The invention relates to a rare earth perovskite catalyst for treating industrial waste gas, a preparation method and application thereof, and belongs to the fields of air pollution control technology and environmental protection catalytic materials. technical background [0002] The production of petrochemical enterprises, the manufacture and processing of materials, the industrialization of the automobile industry, and the combustion of fossil fuels in power plants all emit a large amount of industrial waste gas, resulting in increasingly serious environmental pollution. With the development of the national economy, the annual discharge of industrial waste gas in my country also shows a trend of rapid growth. Industrial waste gas includes volatile organic gases (VOCs) and CO and other toxic and harmful gases. VOCs are a class of hydrophobic and persistent organic pollutants, which will cause great harm to the environment, animal and plant growth, and...

Claims

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Application Information

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IPC IPC(8): B01J23/889B01J23/83B01J29/072B01D53/86B01D53/72B01D53/62
Inventor 沈树宝严小康黄琼陈英文祝社民马文娇
Owner 南京盈博环保科技有限公司
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