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Metal catalyst compound and preparation method thereof

A technology of metal catalysts and composites, applied in the field of metal catalyst composites and their preparation, can solve problems such as low catalytic efficiency and high-temperature sintering, and achieve the effects of reducing specific surface area, increasing porosity, and improving activity

Active Publication Date: 2022-08-09
武汉丰泰威远科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, catalysts for catalytic oxidation of VOCs mainly include noble metals, non-noble metals and molecular sieve catalysts. Noble metal catalysts mainly use noble metals such as Pt, Pd, and Rh as active components, and are often widely used in the catalytic industry. Catalytic oxidation activity and other characteristics, but in the actual application process is prone to high temperature sintering, the problem of low catalytic efficiency

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  • Metal catalyst compound and preparation method thereof
  • Metal catalyst compound and preparation method thereof

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Effect test

Embodiment 1

[0019] In the metal catalyst composite of this embodiment, the carrier of the catalyst is modified γ-Al 2 O 3 , the active components are manganese nitrate tetrahydrate, cerium nitrate hexahydrate, copper nitrate and yttrium nitrate hexahydrate.

[0020] Modified γ-Al 2 O 3 The preparation method is as follows: the γ-Al 2 O 3 Immersion in nitric acid, γ-Al 2 O 3 The mass concentration in nitric acid is 10%; then add lanthanum nitrate, chlorinated paraffin, cellulose and citric acid in proportion, stir evenly, let stand for 1 hour to form a gel, and then extrude into granules at a constant temperature of 130 ° C and 10 MPa , and then carbonized at 300 °C to obtain modified γ-Al 2 O 3 . where γ-Al 2 O 3 : The mass ratio of lanthanum nitrate: chlorinated paraffin: cellulose: citric acid was 10:2:1:3:2.

[0021] The preparation method of the metal catalyst composite comprises the following steps: dissolving manganese nitrate tetrahydrate, cerium nitrate hexahydrate, co...

Embodiment 2

[0023] In the metal catalyst composite of this embodiment, the carrier of the catalyst is modified γ-Al 2 O 3 , the active components are manganese nitrate tetrahydrate, cerium nitrate hexahydrate, copper nitrate and yttrium nitrate hexahydrate.

[0024] Modified γ-Al 2 O 3 The preparation method is as follows: the γ-Al 2 O 3 Immersion in nitric acid, γ-Al 2 O 3 The mass concentration in nitric acid is 12%; then add lanthanum nitrate, chlorinated paraffin, cellulose and citric acid according to the proportion, stir evenly, let stand for 1.5 hours to form a gel, and then extrude it at a constant temperature of 140 ° C and 15 MPa. Granular, and then carbonized at 300 °C to obtain modified γ-Al 2 O 3 . γ-Al 2 O 3 : The mass ratio of lanthanum nitrate: chlorinated paraffin: cellulose: citric acid is 11:3:1.5:4:2.5.

[0025] The preparation method of the metal catalyst composite comprises the following steps: dissolving manganese nitrate tetrahydrate, cerium nitrate hex...

Embodiment 3

[0027] In the metal catalyst composite of this embodiment, the carrier of the catalyst is modified γ-Al 2 O 3 , the active components are manganese nitrate tetrahydrate, cerium nitrate hexahydrate, copper nitrate and yttrium nitrate hexahydrate.

[0028] Modified γ-Al 2 O 3 The preparation method is as follows: the γ-Al 2 O 3 Immersion in nitric acid, γ-Al 2 O 3 The mass concentration in nitric acid is 14%; then add lanthanum nitrate, chlorinated paraffin, cellulose and citric acid according to the proportion, stir evenly, let stand for 2 hours to form gel, and then extrude into granules at a constant temperature of 145 ° C and 15 MPa , and then carbonized at 500 °C to obtain modified γ-Al 2 O 3 . γ-Al 2 O3 : The mass ratio of lanthanum nitrate: chlorinated paraffin: cellulose: citric acid is 13:4:2:4.5:3.

[0029] The preparation method of the metal catalyst composite comprises the following steps: dissolving manganese nitrate tetrahydrate, cerium nitrate hexahydra...

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Abstract

The invention provides a metal catalyst compound, the carrier of the catalyst is modified gamma-Al2O3, and the active components are manganese-containing metal salt, cerium-containing metal salt, copper-containing metal salt and yttrium-containing metal salt; a preparation method of the modified gamma-Al2O3 comprises the following steps: immersing gamma-Al2O3 into nitric acid, then adding lanthanum nitrate, chlorinated paraffin, cellulose and citric acid, uniformly stirring, then standing to form gel, then extruding into particles at a constant temperature, and then carbonizing to obtain the modified gamma-Al2O3. Lanthanum nitrate and chlorinated paraffin are added to modify gamma-Al2O3, so that the high temperature resistance of the metal catalyst compound is effectively improved, and the high-temperature sintering phenomenon in the use process of the catalyst is avoided.

Description

technical field [0001] The invention relates to the technical field of metal catalysts, in particular to a metal catalyst composite and a preparation method thereof. Background technique [0002] With the rapid development of my country's modern industry, the content of volatile organic compounds (VoCs) in the atmosphere has gradually increased, which is produced and discharged into the atmosphere during the production and use of petrochemicals, printing, paints and coatings. VOCs in the air will destroy the ozone layer, cause acid rain and generate photochemical smog, and directly endanger human health. The treatment methods of VOCs generally include absorption method, biological method and condensation method. For the treatment of VOCs waste gas with low concentration and no recycling value, the catalytic oxidation method has a wide range of applications, low ignition temperature, high treatment efficiency and low secondary pollution. and other advantages have received ex...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/889B01D53/86B01D53/72
CPCB01J23/8892B01J23/002B01D53/8668B01J2523/00B01D2257/708B01D2258/06B01J2523/17B01J2523/31B01J2523/36B01J2523/3706B01J2523/3712B01J2523/72Y02A50/20
Inventor 曹伟林源牟凤琼
Owner 武汉丰泰威远科技有限公司
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