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Non-metal doped metal oxide denitration catalyst with high toxicity resistance, and preparation method and application thereof

A technology for denitrification catalysts and oxides, applied in metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, chemical instruments and methods, etc. /Alkaline earth and heavy metal poisoning etc.

Pending Publication Date: 2021-05-28
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In order to solve the problems of the prior art, the purpose of the present invention is to overcome the deficiencies of the prior art, to provide a non-metal-doped metal oxide denitration catalyst with high poisoning resistance, its preparation method and application, which overcomes the traditional denitrification catalyst Severe deactivation by poisoning in the temperature range and metal oxide denitrification catalysts are susceptible to alkali / alkaline earth and heavy metal poisoning

Method used

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  • Non-metal doped metal oxide denitration catalyst with high toxicity resistance, and preparation method and application thereof
  • Non-metal doped metal oxide denitration catalyst with high toxicity resistance, and preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0036] A method for preparing a non-metal-doped metal oxide denitration catalyst with high poisoning resistance, comprising the steps of:

[0037] a. Take a certain amount of cerium nitrate hexahydrate and add it to 20ml distilled water, stir until completely dissolved to obtain a clear solution A with a cerium nitrate concentration of 3wt%;

[0038] b. Take a certain amount of boric acid and add it to 10ml distilled water, and stir until completely dissolved to obtain a solution B with a boric acid concentration of 0.5 wt%.

[0039] c. Mix the above two solutions of solution A and solution B until they are evenly stirred; then add a certain amount of nano-titanium oxide carrier to the mixed solution so that the atomic ratio of B and Ti is 1 / 200, and stir the mixed solution for 3 hours , to obtain a mixture;

[0040] d. suspending the mixed solution prepared in step c on a rotary evaporator at 45°C for drying to obtain a solid substance;

[0041] e. Dry the solid material in a...

Embodiment 2

[0046] This embodiment is basically the same as Embodiment 1, and the special features are:

[0047] In this embodiment, a method for preparing a non-metal-doped metal oxide denitration catalyst with high poisoning resistance comprises the following steps:

[0048] a. Take a certain amount of cerium nitrate hexahydrate and add it to 20ml distilled water, stir until completely dissolved to obtain a clear solution A with a cerium nitrate concentration of 10wt%;

[0049] b. Take a certain amount of boric acid and add it to 10ml distilled water, stir until completely dissolved to obtain a solution B with a boric acid concentration of 0.2 wt%.

[0050] c. Mix the above solution A and solution B until they are evenly stirred; then add a certain amount of nano-titanium oxide carrier to the mixed solution so that the atomic ratio of B and Ti is 1 / 500, and stir the mixture for 3 hours , to obtain a mixture;

[0051] d. suspending the mixed solution prepared in step c on a rotary evap...

Embodiment 3

[0057] This embodiment is basically the same as the above-mentioned embodiment, and the special features are:

[0058] In this embodiment, a method for preparing a non-metal-doped metal oxide denitration catalyst with high poisoning resistance comprises the following steps:

[0059] a. Take a certain amount of ferric nitrate and add it to 20ml of distilled water, stir until completely dissolved to obtain a clear solution A with a ferric nitrate concentration of 5wt%;

[0060] b. Take a certain amount of boric acid and add it to 10ml distilled water, and stir until completely dissolved to obtain a solution B with a boric acid concentration of 1% by weight;

[0061] c. Mix the above two solutions of solution A and solution B until they are evenly stirred; then add a certain amount of nano-titanium oxide carrier to the mixed solution so that the atomic ratio of B and Ti is 1 / 100, and stir the mixed solution for 3 hours , to obtain a mixture;

[0062] d. suspending the mixed sol...

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Abstract

The invention discloses a non-metal doped metal oxide denitration catalyst with high poisoning resistance as well as a preparation method and application thereof. The catalyst is a metal oxide denitration catalyst with high resistance to poisoning of one or more poisons of alkali / alkaline earth metal and heavy metal. According to the catalyst, an oxide precursor is obtained on an oxide carrier mainly by dipping nonmetal precursor salt and metal precursor salt in different proportions, and the nonmetal precursor salt is doped into active component lattices, so that the dispersity of the active components is improved, the interaction between the active components and the carrier is enhanced, and the catalytic activity of the catalyst is improved; and finally calcination is carried out to form the metal oxide catalyst. The catalyst is excellent in medium and low temperature denitration performance, simple in preparation method and low in industrial cost, has extremely strong alkali / alkaline earth metal poisoning resistance and heavy metal poisoning resistance, and is suitable for denitration of fixed source flue gas containing alkali / alkaline earth metal fly ash and heavy metals, such as garbage incinerators, cement furnaces, biomass fuel boilers and glass furnaces.

Description

technical field [0001] The invention relates to a metal oxide denitration catalyst and a preparation method thereof, in particular to a non-metal-doped modified metal oxide denitration catalyst and a preparation method thereof, which are applied in the technical field of nitrogen oxide control and purification in environmental protection. Background technique [0002] Nitrogen oxides (NO x ) as the main pollutants discharged by non-power industries such as coal-fired power plants have seriously affected human health and caused many environmental problems. With the promulgation of a series of national standards in our country, it is imperative to strictly control the emission of nitrogen oxides. As one of the most effective denitrification technologies, selective catalytic reduction of ammonia (NH 3 ) has been widely used in stationary source flue gas denitrification technology, commercial V 2 o 5 -WO 3 (MoO 3 ) / TiO 2 Catalysts have always had problems such as high bio...

Claims

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Application Information

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IPC IPC(8): B01J23/22B01J23/10B01J23/745B01D53/86B01D53/56
CPCB01J23/22B01J23/10B01J23/745B01D53/8628
Inventor 张登松张盼王芃芦陈阿玲李红蕊颜婷婷
Owner SHANGHAI UNIV
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