Environment-friendly manganese-cobalt-aluminum composite oxide mercury removal and denitration catalyst and preparation method thereof

A composite oxide, environment-friendly technology, applied in metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, chemical instruments and methods, etc., can solve problems such as restricting the application of manganese oxide catalysts, and achieve Low cost, environmentally friendly effect

Active Publication Date: 2015-03-25
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This largely restricts the application of manganese oxide catalysts

Method used

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  • Environment-friendly manganese-cobalt-aluminum composite oxide mercury removal and denitration catalyst and preparation method thereof
  • Environment-friendly manganese-cobalt-aluminum composite oxide mercury removal and denitration catalyst and preparation method thereof
  • Environment-friendly manganese-cobalt-aluminum composite oxide mercury removal and denitration catalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A manganese-cobalt-aluminum oxide denitrification synergistic demercury catalyst, the ratio of raw material components is: manganese nitrate with a metal element content of 0.5% of the molar percentage of the catalyst metal element, and a content of 73% of the catalyst metal element mole percentage of cobalt nitrate, and the balance is aluminum nitrate.

[0025] A method for preparing a manganese-cobalt-aluminum oxide denitrification synergistic demercury catalyst, comprising the following steps:

[0026] Step 1. Dissolving cobalt nitrate and aluminum nitrate in water with 100-200 times molar weight at room temperature, stirring to form a transparent solution. Then dilute 50% manganese nitrate solution at room temperature to a solution of 0.01mol / L, accurately measure a certain volume of manganese nitrate solution with a pipette and pour it into the mixed salt solution of cobalt and aluminum, wherein the manganese content is the catalyst metal element mole percent The ...

Embodiment 2

[0034] A manganese-cobalt-aluminum oxide denitrification synergistic demercury catalyst, the raw material component ratio is: manganese nitrate with a metal element content of 1% of the catalyst metal element mole percentage, and a catalyst metal element mole percentage content of 72% of cobalt nitrate, and the balance is aluminum nitrate.

[0035] A method for preparing a manganese-cobalt-aluminum oxide denitrification synergistic demercury catalyst, comprising the following steps:

[0036] Step 1. Dissolving cobalt nitrate and aluminum nitrate in water with 100-200 times molar weight at room temperature, stirring to form a transparent solution. Then dilute 50% manganese nitrate solution at room temperature to a solution of 0.01mol / L, accurately measure a certain volume of manganese nitrate solution with a pipette and pour it into the mixed salt solution of cobalt and aluminum, wherein the manganese content is the catalyst metal element mole percent content of 1%, the cobalt...

Embodiment 3

[0045] A manganese-cobalt-aluminum oxide denitrification synergistic demercury catalyst, the proportion of raw material components is: manganese nitrate with a metal element content of 2% of the catalyst metal element molar percentage, and a catalyst metal element molar percentage content of 71% of cobalt nitrate, and the balance is aluminum nitrate.

[0046] A method for preparing a manganese-cobalt-aluminum oxide denitrification synergistic demercury catalyst, comprising the following steps:

[0047] Step 1. Dissolving cobalt nitrate and aluminum nitrate in water with 100-200 times molar weight at room temperature, stirring to form a transparent solution. Then dilute 50% manganese nitrate solution at room temperature to a solution of 0.01mol / L, accurately measure a certain volume of manganese nitrate solution with a pipette and pour it into the mixed salt solution of cobalt and aluminum, wherein the manganese content is the catalyst metal element mole percent The cobalt con...

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PUM

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Abstract

The invention discloses an environment-friendly manganese-cobalt-aluminum composite oxide mercury removal and denitration catalyst which has a chemical formula of MnaCobAlcOx, wherein a, b and c respectively refer to the percentage of total molar amount of metal elements such as Mn, Co and Al in the catalyst; a ranges from 0.1 percent to 5 percent; b ranges from 70 percent to 75 percent, c refers to the balance, and x is determined by chemical balance according to the values of a, b and c and valence states of the metal elements. The invention also provides a preparation method of the catalyst. According to the catalyst disclosed by the invention, the removal efficiency of gas-phase elementary mercury can be over 80 percent under a hydrogen chloride atmosphere in a temperature range of 100-400 DEG C; the purification efficiency of nitric oxides is 75.8-90.5 percent under an SCR atmosphere in a temperature range of 300-450 DEG C, and the cooperative mercury removal efficiency is 78 percent. The composite oxide catalyst disclosed by the invention is environmentally-friendly and does not have toxic effects on the human body and the environment; and moreover, the raw materials for synthesizing the catalyst are low in cost.

Description

technical field [0001] The invention belongs to the technical field of environmental protection, and relates to the treatment of mercury and nitrogen oxides in waste gas discharged from industrial furnaces such as thermal power plants, industrial boilers, steel sintering, and garbage incineration, and in particular to an environmentally friendly manganese-cobalt-aluminum composite oxide demercury and denitrification Catalyst and method for its preparation. Background technique [0002] With the rapid development of my country's economy and the rapid increase of population, people's consumption of fossil energy such as coal has increased rapidly. Coal occupies a very large proportion (about 70%) in my country's primary energy structure. In 2003, my country's coal consumption was about 1.53×1012t, accounting for about 28% of the world's total consumption. It is estimated that China's coal consumption will double to 3.04×1012t by 2020. At present, the mercury emitted by coal...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/889B01D53/86B01D53/64B01D53/56
Inventor 李俊华邵元凯邓雁希常化振郝吉明
Owner TSINGHUA UNIV
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