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Preparation method of wire mesh denitration catalyst for SCR and catalyst prepared by preparation method

A denitration catalyst and wire mesh technology, applied in the field of environmental protection catalytic materials, can solve the problems of difficult loading of active components on the surface, low specific surface area, etc., and achieve the effects of good ultra-low temperature denitration activity, wide temperature window and overcoming easy peeling.

Active Publication Date: 2019-10-25
ANHUI YUANCHEN ENVIRONMENTAL PROTECTION SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the specific surface area of ​​metal materials is generally very low, and it is difficult to load active components on the surface.

Method used

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  • Preparation method of wire mesh denitration catalyst for SCR and catalyst prepared by preparation method
  • Preparation method of wire mesh denitration catalyst for SCR and catalyst prepared by preparation method
  • Preparation method of wire mesh denitration catalyst for SCR and catalyst prepared by preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] The preparation method of wire mesh SCR denitration catalyst comprises the following steps:

[0043] (1) Cleaning of the carrier: take a stainless steel wire mesh with an alumina coating thickness of 50 μm, place it in a mixed solution of absolute ethanol and acetone, clean it ultrasonically, dry it, and set aside;

[0044] (2) Chemical etching: place the carrier cleaned in step (1) in an aqueous NaOH solution with a concentration of 0.5mol / L and let it stand for etching for 15 minutes. The etching temperature is 20°C. After taking it out, clean it and dry it. ; Then put the carrier in the HF solution with a concentration of 3mol / L and let it etch for 20min. The etching temperature is 20°C. Pit micro-nano structure;

[0045] (3) Weigh 156.3g cerium nitrate hexahydrate, 181.3g manganese nitrate tetrahydrate and 80g molybdenum nitrate pentahydrate and dissolve them in 1000mL deionized water, stir and dissolve, then add 200g silica sol (35wt% solid content, dispersant for...

Embodiment 2

[0052] The preparation method of wire mesh SCR denitration catalyst comprises the following steps:

[0053] (1) Cleaning of the carrier: take a stainless steel wire mesh with an alumina coating thickness of 80 μm, place it in a mixed solution of absolute ethanol and acetone, clean it ultrasonically, dry it, and set aside;

[0054] (2) Chemical etching: place the carrier cleaned in step (1) in an aqueous NaOH solution with a concentration of 2 mol / L and let it stand for etching for 5 minutes at an etching temperature of 30° C. After taking it out, clean it and dry it; Then put the carrier in an HF solution with a concentration of 8mol / L and let it stand for etching for 5 minutes. The etching temperature is 30°C. Pit micro-nano structure;

[0055] (3) Weigh 212.5g cerium nitrate hexahydrate, 246.3g manganese nitrate tetrahydrate and 90g molybdenum nitrate pentahydrate and dissolve them in 1000mL deionized water, stir and dissolve, then add 200g silica sol (35wt% solid content, ...

Embodiment 3

[0062] The preparation method of wire mesh SCR denitration catalyst comprises the following steps:

[0063] (1) Cleaning of the carrier: take a stainless steel wire mesh with an alumina coating thickness of 80 μm, place it in a mixed solution of absolute ethanol and acetone, clean it ultrasonically, dry it, and set aside;

[0064] (2) Chemical etching: place the carrier cleaned in step (1) in an aqueous NaOH solution with a concentration of 2 mol / L and let it stand for etching for 15 minutes at an etching temperature of 50° C. After taking it out, clean it and dry it; Then put the carrier in the HF solution with a concentration of 5mol / L and let it etch for 10min. The etching temperature is 50°C. Pit micro-nano structure;

[0065] (3) Weigh 268.8g cerium nitrate hexahydrate, 246.3g manganese nitrate tetrahydrate and 80g molybdenum nitrate pentahydrate and dissolve them in 1500mL deionized water, stir and dissolve, then add 260g silica sol (35wt% solid content, dispersant of s...

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Abstract

The invention discloses a preparation method of a wire mesh denitration catalyst for selective catalytic reduction (SCR), and relates to the technical field of environmentally-friendly catalytic materials. The method is proposed based on the problem that an active component in a current denitration catalyst is not easily supported on the surface of a metal material carrier; and the method comprises the following steps: (1) performing etching on a carrier; and (2) performing impregnation on the carrier, performing drying, and performing calcination. The invention also provides the wire mesh denitration catalyst for the SCR prepared by the above preparation method. The method provided by the invention has the beneficial effects that the wire mesh denitration catalyst for the SCR prepared bythe method has good denitration performance under the temperature condition of 70-120 DEG C, and the activity at 80 DEG C reaches 80% or more.

Description

technical field [0001] The invention relates to the technical field of environment-friendly catalytic materials, in particular to a method for preparing a wire mesh SCR denitration catalyst and the prepared catalyst. Background technique [0002] With the continuous growth of energy consumption, my country's air pollution prevention and control will face a more severe situation. Among them, nitrogen oxides (NO X ) as one of the main air pollutants, usually including NO, NO 2 , and N 2 O, etc., they mainly come from the exhaust gas of motor vehicles, thermal power station exhaust gas, ship exhaust gas and high-temperature combustion exhaust gas of fossil fuels in other industries. Currently, the most effective NO X Removal technology, still popular Selective Catalyst Reduction (SCR) technology. [0003] At present, flue gas denitrification catalysts widely used commercially are mainly V~Ti catalysts, which have good denitrification performance at 300-400°C. However, thi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/656B01J37/06B01J37/02B01J37/03B01J37/08B01J35/04B01D53/86B01D53/56
CPCB01J23/6562B01J37/06B01J37/0201B01J37/03B01J37/082B01D53/8628B01D2258/0283B01J35/56Y02C20/30
Inventor 项胜王光应宋剑潘有春崔鹏
Owner ANHUI YUANCHEN ENVIRONMENTAL PROTECTION SCI & TECH
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