Non-noble metal composite oxide honeycomb catalyst for low-carbon hydrocarbon catalytic combustion

A technology of composite oxides and honeycomb catalysts, applied in metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, heterogeneous catalyst chemical elements, etc., can solve phase formation difficulties, composite oxides and Weak carrier binding force, uneven distribution of coating active phase, etc., to achieve the effect of easy access to raw materials, good substitution of precious metal catalysts, and uniform and regular microscopic morphology

Pending Publication Date: 2020-02-25
XIAN CATALYST NEW MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to solve the problems in the prior art that the complex oxide active phase is difficult to form, the active phase of the coating is unevenly distributed, and the binding force between the complex oxide and the carrier is weak, and to provide a low-temperature catalyst for the catalytic combustion of low-carbon hydrocarbons. Non-precious metal composite oxide honeycomb catalyst with good activity and strong stability

Method used

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  • Non-noble metal composite oxide honeycomb catalyst for low-carbon hydrocarbon catalytic combustion

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] 1. Pretreatment of honeycomb ceramics

[0030] The cordierite honeycomb ceramics were placed in a muffle furnace and fired at 500°C for 4 hours to obtain pretreated cordierite honeycomb ceramics.

[0031] 2. Preparation of CuMn 2 CeO δ composite oxide

[0032] 24.16g (0.10mol) Cu(NO 3 ) 2 ·3H 2 O, 71.58g (0.20mol) 50% Mn (NO 3 ) 2 Solution, 43.41g (0.10mol) Ce(NO 3 ) 3 ·6H 2 O was dissolved in water and diluted to 800mL to make a solution with a total concentration of metal ions of 0.5mol / L, then 72g (1.20mol) of urea was added and stirred vigorously for 1h, transferred to a hydrothermal kettle, crystallized at 180°C for 12h, and then Filter the precipitate in the kettle, wash until neutral, dry at 100°C for 12h, and roast at 600°C for 6h to obtain CuMn 2 CeO δ composite oxides.

[0033] 3. Preparation of coating solution

[0034] 24g CuMn 2 CeO δComposite oxide, 6g pseudo-boehmite, 2g PEG-4000, 53g water, 5g ethanol are blended, highly dispersed by a pl...

Embodiment 2

[0038] 1. Pretreatment of honeycomb ceramics

[0039] The cordierite honeycomb ceramics were placed in a muffle furnace and fired at 500°C for 4 hours to obtain pretreated cordierite honeycomb ceramics.

[0040] 2. Preparation of CuMn 2 Ce 2 o δ composite oxide

[0041] 19.33g (0.08mol) Cu(NO 3 ) 2 ·3H 2 O, 57.26g (0.16mol) 50% Mn (NO 3 ) 2 solution, 69.47g (0.16mol) Ce(NO 3 ) 3 ·6H 2 O was dissolved in water and diluted to 800mL to prepare a solution with a total concentration of metal ions of 0.5mol / L, then added 72.07g (1.20mol) of urea and stirred vigorously for 1h, transferred to a hydrothermal kettle, and crystallized at 180°C for 12h. Thereafter, the precipitate in the kettle was filtered, washed until neutral, dried at 100°C for 12 hours, and calcined at 600°C for 6 hours to obtain CuMn 2 Ce 2 o δ composite oxides.

[0042] 3. Preparation of coating solution

[0043] 24g CuMn 2 Ce 2 o δ Composite oxide, 6g pseudo-boehmite, 2g PEG-4000, 53g water, 5g ...

Embodiment 3

[0047] 1. Pretreatment of honeycomb ceramics

[0048] The cordierite honeycomb ceramics were placed in a muffle furnace and fired at 500°C for 4 hours to obtain pretreated cordierite honeycomb ceramics.

[0049] 2. Preparation of CuMn 2 Ce 3 o δ composite oxide

[0050] 16.91g (0.07mol) Cu(NO 3 ) 2 ·3H 2 O, 50.11g (0.14mol) 50% Mn (NO 3 ) 2 Solution, 91.19g (0.21mol) Ce(NO 3 ) 3 ·6H 2 Dissolve O in water and dilute to 840mL to make a solution with a total metal ion concentration of 0.5mol / L, then add 75.68g (1.26mol) urea and stir vigorously for 1h, transfer to a hydrothermal kettle, and crystallize at 180°C for 12h, Thereafter, the precipitate in the kettle was filtered, washed until neutral, dried at 100°C for 12 hours, and calcined at 600°C for 6 hours to obtain CuMn 2 Ce 3 o δ composite oxides.

[0051] 3. Preparation of coating solution

[0052] 24g CuMn 2 Ce 3 o δ Composite oxide, 6g pseudo-boehmite, 2g PEG-4000, 5-3g water, 5g ethanol are blended, hig...

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Abstract

The invention discloses a non-noble metal composite oxide honeycomb catalyst for low-carbon hydrocarbon catalytic combustion. The catalyst is obtained by coating cordierite honeycomb ceramic, used asa matrix, with a CuMn2CexOdelta composite oxide coating, wherein x is 1-5, and the CuMn2CexOdelta composite oxide coating accounts for 5-15% of the mass of the catalyst. The active component CuMn2CexOdelta composite oxide in the catalyst is prepared through a hydrothermal method by taking ethylenediamine as a hydrothermal guide precipitant, and then the CuMn2CexOdelta composite oxide is subjectedto pulping, dip-coating, drying and calcination to prepare the composite oxide honeycomb catalyst. The catalyst has the advantages of simple preparation method, easily available raw materials and lowin cost, has a good catalytic combustion activity on low-carbon hydrocarbons such as methane, ethane, propane, ethylene, propylene and n-hexane, can replace a noble metal catalyst, and has good practical values.

Description

technical field [0001] The invention belongs to the technical field of catalysts, and in particular relates to a non-precious metal composite oxide honeycomb catalyst for catalytic combustion of low-carbon hydrocarbons. Background technique [0002] Low-carbon alkanes are a type of organic compounds with simple structure and small molecular weight. They are often discharged in large quantities as by-products of the petrochemical industry. They are the culprits that cause the greenhouse effect and the destruction of the ozone layer. The purification is extremely difficult and has seriously affected my country's air quality and The ecological environment has become one of the exhaust gas problems that need to be solved urgently. [0003] Catalytic combustion is currently a relatively advanced and mature technology for purifying volatile organic compounds (VOCs). This technology relies on the catalytic activity of catalysts to achieve low-temperature oxidation of organic compoun...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/889B01J35/04
CPCB01J23/8892B01J35/04B01J2523/00B01J2523/17B01J2523/72B01J2523/3712
Inventor 金晓东曾利辉李霖李小虎曾永康张之翔
Owner XIAN CATALYST NEW MATERIALS CO LTD
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