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Vanadium-phosphorus-oxygen low-temperature denitration catalyst and molding preparation method thereof

A low-temperature denitrification, vanadium phosphorus oxygen technology, applied in the direction of catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problem of no effective inhibition of ammonium sulfate deposition, no fundamental improvement in anti-sulfur and water resistance, etc. problems, to achieve high and low temperature denitrification activity, low cost, strong anti-sulfur and water-resistance effects

Active Publication Date: 2021-04-16
ANHUI XINCHUANG ENERGY SAVING & ENVIRONMENTAL PROTECTION SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, the catalysts reported in the literature have no idea of ​​effectively inhibiting the deposition of ammonium sulfate, and the anti-sulfur and water-resistance properties of the catalysts at low temperatures (150-240°C) have not been fundamentally improved.

Method used

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  • Vanadium-phosphorus-oxygen low-temperature denitration catalyst and molding preparation method thereof
  • Vanadium-phosphorus-oxygen low-temperature denitration catalyst and molding preparation method thereof
  • Vanadium-phosphorus-oxygen low-temperature denitration catalyst and molding preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0033](1) Preparation of active components

[0034]The oxalic acid is mixed with a solution having a concentration of 15%, and a metcanavanate is added to a proportion of ammonium titrate. After stirring at 25 ° C, it is added to the mixed solution, hydrochloric acid and polyethylene glycol, wherein the metadavate and oxalic acid are added. The molar ratio is 1: 2, the molar ratio of metadavadate and phosphoric acid is 1: 5, the molar ratio of metadavadate and HCl is 1: 4, and the mass ratio of metadavadate and PEG is 1: 0.005. Next, the mixed solution was stirred at a temperature of 25 ° C for 2 h, then heated at 70 ° C, and the active component VPO gel was formed, and the VPO gel density was 1.231 g / cm.3.

[0035](2) carrier preparation

[0036]The specific surface area is greater than 300m2 / g of titanium white powder and specific surface area are 90 ~ 110m2The titanium white powder of / g is mixed in a ratio of 1: 9, and monoethanolamine, lactic acid, carboxymethylcellulose (CMC), poly...

Embodiment 2

[0041](1) Preparation of active components

[0042]The oxalic acid is mixed with a solution having a concentration of 15%, and a metcanavanate is added to a proportion of ammonium titrate. After stirring at 25 ° C, it is added to the mixed solution, hydrochloric acid and polyethylene glycol, wherein the metadavate and oxalic acid are added. The molar ratio is 1: 2, the molar ratio of metadavadate and phosphoric acid is 1: 5, the molar ratio of metadavadate and HCl is 1: 4, and the mass ratio of metadavadate and PEG is 1: 0.005. The mixed solution was then stirred at a temperature of 25 ° C for 2 h, then heated at 70 ° C, and the active component VPO gel was formed, and the VPO gel density was 1.231 g / cm3.

[0043](2) carrier preparation

[0044]The specific surface area is greater than 300m2 / g of titanium white powder and specific surface area are 90 ~ 110m2The titanium white powder of / g is mixed by mass ratio of 2: 8, and monoethanolamine, lactic acid, carboxymethylcellulose (CMC), pol...

Embodiment 3

[0049](1) Preparation of active components

[0050]The oxalic acid is mixed with a solution having a concentration of 15%, and a metcanavanate is added to a proportion of ammonium titrate. After stirring at 25 ° C, it is added to the mixed solution, hydrochloric acid and polyethylene glycol, wherein the metadavate and oxalic acid are added. The molar ratio is 1: 2, the molar ratio of metadavadate and phosphoric acid is 1: 5, the molar ratio of metadavadate and HCl is 1: 4, and the mass ratio of metadavadate and PEG is 1: 0.005. The mixed solution was then stirred at a temperature of 25 ° C for 2 h, then heated at 70 ° C, and the active component VPO gel was formed, and the VPO gel density was 1.231 g / cm3.

[0051](2) carrier preparation

[0052]The specific surface area is greater than 300m2 / g of titanium white powder and specific surface area are 90 ~ 110m2The titanium white powder of / g is mixed in a ratio of 3: 7, and monoethanolamine, lactic acid, carboxymethylcellulose (CMC), polyet...

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Abstract

The invention discloses a vanadium-phosphorus-oxygen low-temperature denitration catalyst and a molding preparation method thereof. The molding preparation method comprises the following steps: firstly, preparing a vanadium-phosphorus-oxygen gel active component; then, mixing titanium dioxide with the specific surface area of more than 300 m<2> / g and titanium dioxide with the specific surface area of 90-110 m<2> / g in proportion, adding mono-ethanol amine, lactic acid, carboxymethyl cellulose, polyoxyethylene, glass fibers, deionized water, ammonia water and the like, uniformly stirring and mixing the materials, ageing, carrying out extrusion molding, drying and calcining to obtain a titanium dioxide honeycomb carrier; and finally, preparing the vanadium-phosphorus-oxygen catalyst by taking the vanadium-phosphorus-oxygen gel as an active component and the titanium dioxide honeycomb as a carrier and adopting an ultrasonic impregnation method, wherein the optimal molding preparation condition of the catalyst is obtained by controlling the gel density, the impregnation temperature, the impregnation time, the ultrasonic time and the ultrasonic power.

Description

Technical field[0001]The present invention belongs to the field of environmental protection technology, and in particular, the present invention relates to a vanadium phosphorus oxygen low temperature denitritis catalyst and a molding method thereof.Background technique[0002]Nitrogen oxides (NOX) emitted with industrial flue gas (NOX) is one of my country's current main atmospheric pollutants. Selective Cataic Reduction, Dress SCR) Denit is the most effective way to control NOx. The coal-fired flue gas denitration has been fully implemented, but in a coke oven, sintered flue gas is a typical non-electric industrial flue gas temperature than the coal-fired smoke, and the flue gas contains a large amount of SO2 and water vapor, and the catalyst activity is easily The effect of SO2 and water vapor in the flue gas decreased. Different transition metals and their combinations, replacement vectors, etc., the replacement carrier, etc., the low temperature dinning activity of the catalyst h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/18B01J37/03B01J37/02B01J37/34B01J35/04B01D53/56B01D53/86
CPCY02A50/20
Inventor 胡笳
Owner ANHUI XINCHUANG ENERGY SAVING & ENVIRONMENTAL PROTECTION SCI & TECH
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