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Ceria-zirconia composite oxide-loaded perovskite type catalyst with sulfur resistance and preparation method of catalyst

A composite oxide and perovskite-type technology, which is applied in metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, chemical instruments and methods, etc. Structure and other issues, to achieve the effect of improving sulfur resistance, reducing direct contact with sulfur, and strong sulfur resistance

Inactive Publication Date: 2016-02-03
FUJIAN ZIJIN ENVIRONMENT ENG TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

For the treatment of sulfur-containing organic waste gas, the catalyst in patent CN201010510998.1 uses noble metals as active components, and adds various oxides to the catalyst to effectively reduce SO 2 、H 2 The role of S, etc. and noble metals to obtain strong anti-sulfur performance, but the catalyst has no certain structure, and the structure-activity relationship is unclear.

Method used

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  • Ceria-zirconia composite oxide-loaded perovskite type catalyst with sulfur resistance and preparation method of catalyst
  • Ceria-zirconia composite oxide-loaded perovskite type catalyst with sulfur resistance and preparation method of catalyst
  • Ceria-zirconia composite oxide-loaded perovskite type catalyst with sulfur resistance and preparation method of catalyst

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Embodiment 1: the catalyzer described in this embodiment comprises following composition:

[0035] Active component: Perovskite La 0.9 Sr 0.1 MnO 3 , accounting for 5%wt% of the catalyst;

[0036] Auxiliary agent: Pt, accounting for 0.01wt% of the catalyst;

[0037] Carrier: Ce 0.9 Zr 0.1 o 2 Composite oxides account for 94.99wt% of the catalyst.

[0038] Concrete preparation steps are:

[0039] Step (1): A certain concentration of Ce(NO 3 ) 3 , Zr(NO 3 ) 3 The precursor solution was mixed, and Ce was prepared by co-precipitation method 0.9 Zr 0.1 o 2 composite oxides;

[0040] Step (2): Prepare the deionized aqueous solution of manganese nitrate, strontium nitrate and lanthanum nitrate according to the ratio La:Sr:Mn=0.9:0.1:1, add Ce after mixing 0.9 Zr 0.1 o 2 Composite oxide carrier, stirred evenly, impregnated for 24 hours;

[0041] Step (3): The mixture in step (2) was first dried at 90°C for 12 hours, and then transferred to a muffle furnace fo...

Embodiment 2

[0046] Embodiment 2: the catalyst described in this embodiment, comprises following composition:

[0047] Active component: Perovskite La 0.8 Sr 0.2 MnO 3 , accounting for 14wt% of the catalyst;

[0048] Auxiliary agent: Pt, accounting for 0.05wt% of the catalyst;

[0049] Carrier: Ce 0.7 Zr 0.3 o 2 Composite oxides account for 85.95% of the catalyst.

[0050] Concrete preparation steps are:

[0051] Step (1): Add a certain concentration of Ce(NO 3 ) 3 , Zr(NO 3 ) 3 The precursor solution was mixed, and Ce was prepared by co-precipitation method 0.7 Zr 0.3 o 2 composite oxides;

[0052] Step (2): Prepare the deionized aqueous solution of manganese nitrate, strontium nitrate and lanthanum nitrate according to the ratio La:Sr:Mn=0.8:0.2:1, add Ce after mixing 0.7 Zr 0.3 o 2 Composite oxide carrier, stirred evenly, impregnated for 24 hours;

[0053] Step (3): The mixture in step (2) was first dried at 100°C for 15 hours, and then transferred to a muffle furnace...

Embodiment 3

[0057] Embodiment 3: the catalyst described in this embodiment comprises following composition:

[0058] Active component: Perovskite La 0.6 Sr 0.4 MnO 3 , accounting for 10wt% of the catalyst;

[0059] Auxiliary agent: Pt, accounting for 0.5wt% of the catalyst;

[0060] Carrier: Ce 0.5 Zr 0.5 o 2 Composite oxides account for 89.5wt% of the catalyst.

[0061] Step (1): A certain concentration of Ce(NO 3 ) 3 , Zr(NO 3 ) 3 The precursor solution was mixed, and Ce was prepared by co-precipitation method 0.5 Zr 0.5 o 2 composite oxides;

[0062] Step (2): Prepare the deionized aqueous solution of manganese nitrate, strontium nitrate and lanthanum nitrate in proportion La:Sr:Mn=0.6:0.4:1, mix and add Ce 0.5 Zr 0.5 o 2 Composite oxide carrier, stirred evenly, impregnated for 24 hours;

[0063] Step (3): The mixture in step (2) was first dried at 110°C for 18 hours, and then transferred to a muffle furnace for calcination at 700°C in air for 3 hours to obtain (La 0...

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Abstract

The invention discloses a ceria-zirconia composite oxide-loaded perovskite type catalyst with sulfur resistance. The catalyst comprises an active component, a noble metal promoter and a carrier, wherein the active component is perovskite La1-xSrxMnO3 which accounts for 4 to 14wt% of the catalyst, and x is equal to 0-0.5; the noble metal promoter accounts for 0.01 to 1wt% of the catalyst; the carrier is a Ce1-yZryO2 composite oxide which accounts for 85 to 95% of the catalyst, and y is equal to 0.1-0.5. A preparation process comprises two times of loading: firstly, loading perovskite to the Ce1-yZryO2 composite oxide, and then loading the noble metal promoter to the Ce1-yZryO2 composite oxide. The catalyst provided by the invention reaches relatively high catalyst reactivity during a catalytic combustion process of VOCs, and has relatively high anti-sulfur-poisoning property.

Description

technical field [0001] The invention belongs to the technical field of preparation of volatile organic compound catalytic combustion catalysts, and in particular relates to a cerium-zirconium composite oxide-loaded perovskite catalyst with anti-sulfur performance and a preparation method thereof. Background technique [0002] Volatile organic compounds (Volatile Organic Compounds, VOCs) are a type of common polluting gases, mainly from petrochemical, pharmaceutical, printing, painting, shoemaking and other industries. Such substances not only cause environmental problems such as the hole in the ozone layer and photochemical smog, but also cause nausea, headache, convulsions, coma and other symptoms in humans, and even endanger life. The method of catalytic combustion has the advantages of high efficiency, energy saving, environmental protection, and easy product control, and is considered to be one of the best treatment technologies. An efficient and stable catalyst is the ...

Claims

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Application Information

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IPC IPC(8): B01J23/656F23G7/07
Inventor 杨广华王洪明黄丽明吴晓东余立清
Owner FUJIAN ZIJIN ENVIRONMENT ENG TECH
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