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Environmentally-friendly denitration catalyst and preparation method thereof

A denitration catalyst and environment-friendly technology, applied in the field of environment-friendly denitration catalyst and its preparation, can solve the problems restricting the application of manganese oxide catalyst, and achieve good anti-SO2 poisoning and environment-friendly effects

Inactive Publication Date: 2013-03-27
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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  • Environmentally-friendly denitration catalyst and preparation method thereof
  • Environmentally-friendly denitration catalyst and preparation method thereof
  • Environmentally-friendly denitration catalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] An environment-friendly denitration catalyst, the ratio of raw material components is:

[0025] Cerium nitrate with a content of 40% of the molar percentage of the catalyst, ammonium molybdate with a content of 10% of the molar percentage of the catalyst, germanium oxide with a content of 5% of the molar percentage of the catalyst, and a molar percentage of the catalyst 45% of ferric nitrate.

[0026] The catalyst preparation method comprises the following steps:

[0027] Step 1. Dissolving cerium nitrate and ammonium molybdate in water with 50-120 times the molar amount at room temperature, adding 1 / 10 molar amount of oxalic acid as a cosolvent, and stirring to form a transparent solution. Then dissolve the germanium oxide and ferric nitrate in water with 50 times the molar amount at room temperature, stir evenly, and pour into the above solution.

[0028] Step 2: Dissolve ammonium carbonate in water to prepare a 1mol / L ammonium carbonate solution, then add it dropwi...

Embodiment 2

[0034] An environment-friendly denitrification catalyst, the ratio of raw material components is:

[0035] Cerium nitrate with a content of 60% of the molar percentage of the catalyst, ammonium molybdate with a content of 30% of the molar percentage of the catalyst, germanium oxide with a content of 8% of the molar percentage of the catalyst, and a molar percentage of the catalyst 2% ferric nitrate.

[0036] A preparation method of an environment-friendly denitration catalyst, comprising the following steps:

[0037] Step 1. Dissolving cerium nitrate and ammonium molybdate in water with 50-120 times the molar amount at room temperature, adding 1 / 10 molar amount of oxalic acid as a cosolvent, and stirring to form a transparent solution. Then dissolve the germanium oxide and ferric nitrate in water with 100 times the molar amount at room temperature, stir evenly, and then pour into the above solution.

[0038] Step 2: Dissolve ammonium carbonate in water to prepare a 1mol / L am...

Embodiment 3

[0044] An environment-friendly denitrification catalyst, the ratio of raw material components is:

[0045] Cerium nitrate with a content of 48% of the molar percentage of the catalyst, ammonium molybdate with a content of 12% of the molar percentage of the catalyst, germanium oxide with a content of 8% of the molar percentage of the catalyst, and a molar percentage of the catalyst 32% of ferric nitrate.

[0046] A preparation method of an environment-friendly denitration catalyst, comprising the following steps:

[0047] Step 1. Dissolving cerium nitrate and ammonium molybdate in water with 50-120 times the molar amount at room temperature, adding 1 / 10 molar amount of oxalic acid as a cosolvent, and stirring to form a transparent solution. Then dissolve the germanium oxide and ferric nitrate in water with 100 times the molar amount at room temperature, stir evenly, and then pour into the above solution.

[0048] Step 2: Dissolve ammonium carbonate in water to prepare a 1mol / ...

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Abstract

The invention relates to an environmentally-friendly denitration catalyst which has the expression formula of CeMoGeFeOx, wherein the molar ratio among all the elements Ce, Mo, Ge and Fe is (0.40-0.65):(0.05-0.23):(0.05-0.10):(0.50-0.02), and x is confirmed by balancing positive and negative valence electrons of all atoms. A preparation method of the environmentally-friendly denitration catalyst comprises the following steps of: step 1, dissolving cerous nitrate and ammonium molybdate into water, adding a cosolvent into the solution to form a transparent solution, then dissolving germanium oxide and ferric nitrate into water, evenly stirring and then mixing; step 2, adding ammonium carbonate solution into the mixed solution dropwise and stirring to obtain slurry; step 3, putting the slurry into a centrifugal machine for centrifuge; and step 4, drying and roasting the cleaned precipitate to obtain the environmentally-friendly denitration catalyst. The environmentally-friendly denitration catalyst has the purification efficiency for the nitric oxide reaching up to 65-100% at the temperature of 200-450 DEG C; and the environmentally-friendly denitration catalyst is environmentally-friendly and free from toxic effects, and has good performances of resisting SO2 toxication and molysite class fly ash inactivation.

Description

technical field [0001] The invention relates to a catalyst for treating nitrogen oxides in waste gas discharged from industrial boilers such as steel plants, glass kilns and cement plants, and in particular to an environment-friendly denitrification catalyst and a preparation method thereof. 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. Nitrogen oxides (NOx) produced by fossil fuel combustion and released into the atmosphere x ) and other substances seriously threaten the human living environment and restrict the long-term and sustainable development of the economy and society. my country has incorporated the control of nitrogen oxide emissions into the "Twelfth Five-Year Plan" development plan. The development of nitrogen oxide control technology adapted to my country's national conditions has become a hot issue in the field of...

Claims

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Application Information

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IPC IPC(8): B01J23/887B01D53/86B01D53/56
Inventor 李俊华常化振杜钰郝吉明
Owner TSINGHUA UNIV
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