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Preparation method for barium-containing flue gas denitration catalyst and denitration catalyst prepared by using same

A denitration catalyst and catalyst technology are applied in the field of denitration catalysts, which can solve the problems of easy wear and tear of denitration catalysts, and achieve the effect of reducing the safety level.

Pending Publication Date: 2020-05-12
ANHUI YUANCHEN ENVIRONMENTAL PROTECTION SCI & TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] One of the technical problems to be solved by the present invention is that the existing denitration catalysts are prone to wear problems, and a barium-containing flue gas denitration catalyst is provided

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] The preparation method of barium-containing flue gas denitrification catalyst comprises the following steps:

[0032] (1) Add 1 part of ammonium metatungstate and 1 part of ammonium metavanadate into 8 parts of oxalic acid solution with a mass fraction of 2%, stir and mix the mixture;

[0033] (2) Add 1 part of barium hydroxide and 4 parts of titanium dioxide aqueous solution to 1 part of the mixed solution in step (1), and obtain the raw material solution after ultrasonication for 1 h under 300w power; the barium compound in the present embodiment is barium hydroxide ;

[0034] (3) drying the raw material solution at 100°C to constant weight, and calcining at 400°C for 20 hours to obtain barium-containing catalyst powder;

[0035] (4) Add 1 part of water to moisten 9 parts of barium-containing catalyst powder, add 4 parts of aluminum hydrosol, add 3 parts of phenolic resin and 2 parts of glycerin, stir to obtain a mixture, adjust the moisture content of the mixture to...

Embodiment 2

[0037] (1) Add 5 parts of ammonium metatungstate and 2 parts of ammonium metavanadate into 10 parts of oxalic acid solution with a mass fraction of 2%, and stir to obtain a mixed solution;

[0038] (2) Add 2 parts of barium hydroxide and 8 parts of titanium dioxide aqueous solution to 3 parts of mixed solution in step (1), under 300w power, after ultrasonic 1h, obtain raw material liquid; The barium compound in the present embodiment is barium oxide;

[0039] (3) drying the raw material solution at 100°C to constant weight, and calcining at 500°C for 10 hours to obtain barium-containing catalyst powder;

[0040] (4) Add 2 parts of water to wet 8 parts of barium-containing catalyst powder, add 3 parts of aluminum hydrosol, add 2 parts of phenolic resin and 3 parts of glycerin, stir to obtain the mixture, adjust the moisture content of the mixture to 20%, and pass through the twin-screw The honeycomb-shaped wet body is extruded by an extrusion method to prepare a barium-containi...

Embodiment 3

[0042] (1) Add 10 parts of ammonium metatungstate and 2 parts of ammonium metavanadate into 15 parts of oxalic acid solution with a mass fraction of 2%, and stir to obtain a mixed solution;

[0043] (2) Add 2 parts of barium oxide and 8 parts of titanium dioxide aqueous solution to 5 parts of mixed solution in step (1), under 300w power, after ultrasonic 1h, obtain raw material liquid; The barium compound in the present embodiment is barium oxide;

[0044] (3) drying the raw material solution at 100°C to constant weight, and calcining at 650°C for 5 hours to obtain barium-containing catalyst powder;

[0045] (4) Add 3 parts of water to moisten 10 parts of barium-containing catalyst powder, add 2 parts of aluminum hydrosol, add 2 parts of phenolic resin and 4 parts of ethanolamine, stir to obtain a mixture, adjust the moisture content of the mixture to 35%, and pass through the twin-screw The honeycomb-shaped wet body is extruded by an extrusion method to prepare a barium-conta...

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Abstract

The invention discloses a preparation method for a barium-containing flue gas denitration catalyst, and relates to the technical field of denitration catalysts. The preparation method comprises the following steps: (1) adding ammonium metatungstate and ammonium metavanadate into an oxalic acid solution so as to prepare a mixed solution; (2) adding a barium compound and a titanium dioxide aqueous solution into the mixed solution obtained in the step (1), and carrying out ultrasonic treatment so as to obtain a raw material solution; (3) drying the raw material solution at 100 DEG C until the weight is constant, and carrying out calcining; and (4) adding water to wet barium-containing catalyst powder, adding an aluminum hydrosol, then adding an organic adhesive and a molding auxiliary agent,adjusting the moisture content of a mixture to 15-35%, and carrying out extrusion molding so as to obtain the barium-containing denitration catalyst. The preparation method disclosed by the inventionhas the following beneficial effects: the barium-containing compound and titanium dioxide macromolecules can generate a lattice doping phenomenon when being calcined at 450-650 DEG C, so the compression resistance and the wear resistance of a carrier are changed. Meanwhile, the denitration catalyst is guaranteed to reach denitration efficiency of 95% or above within a temperature range of 300-400DEG C.

Description

technical field [0001] The invention relates to the technical field of denitration catalysts, in particular to a method for preparing a barium-containing flue gas denitration catalyst and the prepared denitration catalyst. Background technique [0002] my country's energy structure is dominated by coal, and the resulting NOx emissions are increasing year by year, ranking first in the world at present. [0003] At present, flue gas denitrification is one of the effective methods to control the emission of nitrogen oxides in the process of coal combustion. Selective catalytic reduction (SCR) technology is widely used in coal-fired power plants and non It is widely used in the flue gas denitrification process in the power industry. For example, patent CN101829560 discloses a denitration catalyst, which is composed of the following components in parts by weight: 70-90 parts of titanium dioxide, 8-15 parts of tungsten trioxide, 1.5-3 parts of vanadium pentoxide, 2-6 parts of ara...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/30B01J32/00B01J23/02B01D53/86B01D53/56
CPCB01J23/30B01J23/002B01J23/02B01D53/8628B01D2258/0283B01J2523/00B01J2523/25B01J2523/47B01J2523/55B01J2523/69
Inventor 王光应梁燕赵羽崔鹏
Owner ANHUI YUANCHEN ENVIRONMENTAL PROTECTION SCI & TECH
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