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Novel manganese-based low-temperature denitration catalyst

A low-temperature denitrification and catalyst technology, applied in the direction of physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, etc., can solve the problem of being unable to meet stricter regulations on nitrogen oxide emissions , high denitrification activity, lack of

Pending Publication Date: 2019-10-18
SINOCHEM MODERN ENVIRONMENTAL CHEM INDAL XI ANCO +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although these methods have effectively improved the low-temperature activity of manganese-based oxides, when these catalysts are used to eliminate nitrogen oxides, the light-off temperature is not lower than 150 ° C, and the medium and high temperature section (250 ~ 350 degrees) is not It has high denitrification activity and cannot meet the stricter regulations on nitrogen oxide emissions in the future.

Method used

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  • Novel manganese-based low-temperature denitration catalyst
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  • Novel manganese-based low-temperature denitration catalyst

Examples

Experimental program
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Effect test

Embodiment 1

[0051] Embodiment 1: the preparation of catalyst

[0052] (1) Composite oxide carrier CeO 2 -ZrO 2 preparation of

[0053] First prepare 500mL aqueous solution of cerium nitrate and zirconium nitrate, wherein the concentrations of cerium nitrate and zirconium nitrate are respectively 0.2mol / L, which is recorded as solution A; Add solution B dropwise to solution A at a rate of 1mL / min. After solution B is completely added dropwise, age for 12h, filter and dry at 110°C for 12h, and finally place in a muffle furnace and heat up at 2°C / min to 550° C., constant temperature for 6 hours to obtain a catalyst carrier.

[0054] (2) Manganese on composite oxide carrier CeO 2 -ZrO 2 Electrostatic adsorption on

[0055] Take 6g carrier, disperse it in 300mL water, add manganese nitrate and ethylenediamine in turn under vigorous stirring, the molar ratio of ethylenediamine and manganese nitrate is 1:1, stir for 1h, then slowly add dilute nitric acid dropwise, control the pH at 7 or s...

Embodiment 2

[0058] Embodiment 2: the preparation of catalyst

[0059] The preparation process is similar to that of Example 1, first preparing the composite oxide Al 2 o 3 -TiO 2 , and then get Mn / Al by electrostatic adsorption 2 o 3 -TiO 2 -EA.

Embodiment 3

[0060] Embodiment 3: the preparation of catalyst

[0061] The preparation process is similar to that of Example 1, first preparing the composite oxide Al 2 o 3 -CeO 2 , and then get Mn / Al by electrostatic adsorption 2 o 3 -CeO 2 -EA.

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Abstract

The invention discloses a preparation method of a manganese-based low-temperature denitration catalyst. The preparation method comprises the following steps: firstly, preparing a composite oxide carrier AOx-BOx, and then adsorbing manganese on the composite oxide carrier AOx-BOx to obtain the catalyst. The catalyst prepared by the invention has high stability and high dispersion, and can be used for eliminating nitric oxides.

Description

technical field [0001] The invention relates to a manganese-based low-temperature denitration catalyst, in particular to a manganese-based low-temperature denitration catalyst used for nitrogen oxide removal. Background technique [0002] In recent years, smog has occurred frequently across the country, and studies have shown that sulfate is the main driving factor for the formation of heavy pollution. In terms of absolute contribution, during the period of heavy pollution, sulfate accounted for 20% of the mass of atmospheric fine particulate matter PM2. Sulfate is the component with the fastest rising relative proportion in PM2.5. Recently, Academician He Kebin, Professor Zhang Qiang from Tsinghua University, and Professor Cheng Yafang from the Max Planck Institute of Chemistry in Germany studied the cause of the formation of sulfate, the main component of smog in Beijing and North China, and found that the carbon dioxide in the water adsorbed by atmospheric fine particles...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/34B01D53/86B01D53/94B01D53/56
CPCB01J23/34B01D53/8628B01D53/9413B01D2258/0283B01D2257/404B01D2258/01Y02T10/12
Inventor 胡准杨洋杨会娥刘坤峰赵升
Owner SINOCHEM MODERN ENVIRONMENTAL CHEM INDAL XI ANCO