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An environment-friendly iron-antimony composite oxide denitrification catalyst and preparation method thereof

A denitrification catalyst and an environment-friendly technology, applied in the field of environmental catalysis, can solve the problems of poor selectivity, high reaction temperature, and narrow reaction temperature window, and achieve the effects of high dispersion, high reactivity, and wide reaction temperature window

Active Publication Date: 2019-03-12
泰州盛勤环境工程有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the current catalyst in the NO x It has been used in the catalytic purification process for many years, but it still has some defects, such as high reaction temperature, narrow reaction temperature window, active component V 2 o 5 Biological toxicity, high temperature N 2 Selection of disadvantages such as poor performance

Method used

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  • An environment-friendly iron-antimony composite oxide denitrification catalyst and preparation method thereof
  • An environment-friendly iron-antimony composite oxide denitrification catalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Dissolve the corresponding amount of ferric nitrate in deionized water, fully stir at room temperature for 15 minutes, then add the corresponding amount of antimony acetate to it and continue to stir for 30 minutes to make it fully mixed, wherein the concentration of both Fe and Sb in the above mixed solution is 0.05 mol / L, then add ferric nitrate and the gallic acid of 3wt% of total weight of antimony acetate to it and continue stirring treatment 20min; It was fully mixed, then transferred to a hydrothermal reaction kettle, treated at 80°C for 8h, and then lowered to room temperature to obtain a mixture containing a precipitate, which was filtered to obtain a primary precipitate; 15 times the volume of 10 % hydrogen peroxide was stirred at room temperature for 3 hours, filtered and washed to obtain a precipitate, and then acetone 100 times the volume of the precipitate was added to it for azeotropic distillation; the obtained material was dried at 105°C for 12 hours, an...

Embodiment 2

[0027] Dissolve the corresponding amount of ferric sulfate in deionized water, fully stir at room temperature for 15 minutes, then add the corresponding amount of antimony trichloride to it and continue to stir for 30 minutes to fully mix, wherein the concentrations of Fe and Sb in the above mixed solution Both are 2.5 mol / L, then add ferric sulfate and antimony trichloride total weight 6wt% gallic acid wherein to continue to stir and handle 20min; Add ferric sulfate and antimony trichloride total weight 8 times of urea , stirred for 3 hours to make it fully mixed, then transferred to a hydrothermal reaction kettle, treated at 100°C for 6 hours, and then cooled to room temperature to obtain a mixture containing a precipitate, which was filtered to obtain a primary precipitate; added to the obtained primary precipitate 10 times the volume of 30% hydrogen peroxide was stirred at room temperature for 6 hours, filtered and washed to obtain a precipitate, and then 200 times the volu...

Embodiment 3

[0029] Dissolve the corresponding amount of ferric chloride in deionized water, stir fully at room temperature for 15 minutes, then add the corresponding amount of sodium antimonate to it and continue stirring for 30 minutes to fully mix, wherein the concentrations of Fe and Sb in the above mixed solution All are 0.5 mol / L, then add ferric sulfate and the gallic acid of 4wt% of total weight of antimony trichloride to it and continue stirring treatment 20min; , stirred for 2 hours to make it fully mixed, then transferred to a hydrothermal reaction kettle, treated at 90°C for 7 hours, and then lowered to room temperature to obtain a mixture containing a precipitate, which was filtered to obtain a primary precipitate; added to the obtained primary precipitate 12 times the volume of 20% hydrogen peroxide was stirred at room temperature for 4 hours, filtered and washed to obtain a precipitate, and then 150 times the volume of the precipitate was added to acetone for azeotropic disti...

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Abstract

The invention discloses an environment-friendly iron-antimony composite oxide catalyst. A combined treatment process of a homogeneous coprecipitation process and a hydrothermal process is employed during preparation of the catalyst; the technical means of azeotropic distillation is used for post-treatment; and the oxide of iron and the oxide of antimony in the metal composite oxide can form a solid solution, and in terms of the mol ratio of metallic elements, a mol ratio of iron to antimony is 0.5 to 2.0. The catalyst prepared in the invention shows excellent denitration activity, N2 selectivity, reaction stability, water resistance and sulfur tolerance in a range of 200 to 400 DEG C.

Description

technical field [0001] The invention belongs to the technical field of environmental catalysis and relates to a denitrification catalyst, in particular to an environment-friendly iron-antimony composite oxide catalyst for removing nitrogen oxides in coal-fired flue gas and a preparation method thereof. Background technique [0002] As my country's petrochemical energy consumption continues to increase, air pollution is also increasing. Nitrogen oxides (NO x ) has caused the type of acid rain in my country to change from sulfuric acid type to sulfuric acid and nitric acid compound type. In addition, it will also cause major environmental problems such as photochemical smog and greenhouse effect, which poses a major danger to the ecological environment and human health. How to effectively control NO x emissions have become an important issue in the field of environmental protection. NO in the atmosphere has been found to x On the one hand, it comes from the exhaust gas emitt...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/843B01D53/90B01D53/56
CPCB01D53/8628B01D53/90B01D2258/0283B01J23/002B01J23/8435
Inventor 王欧庭
Owner 泰州盛勤环境工程有限公司
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