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A mixed non-metallic ore clay-loaded γ‑mno 2 Low-temperature denitrification catalyst and preparation method thereof

A non-metallic ore, low-temperature denitrification technology, applied in the field of denitrification catalysis, can solve the problems of high reaction temperature and expensive catalyst carrier, and achieve the effects of low activation temperature, abundant reserves and low energy consumption

Active Publication Date: 2017-11-10
CHANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention aims at the disadvantages of expensive catalyst carrier and high reaction temperature in the prior art, and provides a mixed non-metallic ore clay-loaded γ-MnO 2 Low-temperature denitrification catalyst and preparation method thereof

Method used

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  • A mixed non-metallic ore clay-loaded γ‑mno <sub>2</sub> Low-temperature denitrification catalyst and preparation method thereof
  • A mixed non-metallic ore clay-loaded γ‑mno <sub>2</sub> Low-temperature denitrification catalyst and preparation method thereof
  • A mixed non-metallic ore clay-loaded γ‑mno <sub>2</sub> Low-temperature denitrification catalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] 1. Dissolve 10g of sepiolite clay and 10g of attapulgite clay in 1.5mol / L HCl until the solution does not produce bubbles, and let stand for 18h. Disperse the acidified non-metallic ore clay in deionized water, use a 4000r / min emulsifier to pulp, and select the supernatant to obtain a 4g / 100mL suspension slurry;

[0018] 2. At room temperature, dissolve 100mL of MnSO with a mass concentration of 3g / 100mL 4 ·H 2 O and 130mL mass concentration of 3g / 100mL (NH 4 ) 2 S 2 o 8 Put the solution in 500mL step (1) slurry, keep stirring, raise the temperature to 80°C for 2h; after the reaction is complete, filter the product with suction, wash and dry to obtain 7wt.% γ-MnO 2 - Sepiolite clay / attapulgite clay low-temperature denitrification catalyst.

[0019] figure 1 It is the XRD pattern of sepiolite before and after acidification. According to the preparation method in Example 1, sepiolite is prepared by reacting in 1.5mol / L HCl; it can be clearly seen from the figure th...

Embodiment 2

[0022] 1. Dissolve 15g of sepiolite clay and 5g of montmorillonite clay in 1.5mol / L HCl until the solution does not produce bubbles, and let it stand for 24 hours. Disperse the acidified non-metallic mineral clay in deionized water, use a 5000r / min emulsifier to pulp, and select the supernatant to obtain a 5g / 100mL suspension slurry;

[0023] 2. At room temperature, dissolve 60mL of MnSO with a mass concentration of 5g / 100mL 4 ·H 2 O and 80mL mass concentration of 5g / 100mL (NH 4 ) 2 S 2 o 8 Put the solution in 400mL of step (1) slurry, keep stirring, raise the temperature to 75°C for 2.5h; after the reaction is complete, filter the product with suction, wash and dry to obtain 7wt.% γ-MnO 2 -Sepiolite clay / montmorillonite clay low-temperature denitrification catalyst.

Embodiment 3

[0025] 1. Dissolve 10g of sepiolite clay and 10g of cordierite clay in 2.5mol / L HCl until the solution does not produce bubbles, and let stand for 20h. Disperse the acidified non-metallic ore clay in deionized water, use a 4000r / min emulsifier to pulp, and select the supernatant to obtain a 8g / 100mL suspension slurry;

[0026] 2. At room temperature, dissolve 75mL of MnSO with a mass concentration of 4g / 100mL 4 ·H 2 O and 100mL mass concentration of 4g / 100mL (NH 4 ) 2 S 2 o 8 Put the solution in 250mL step (1) slurry, keep stirring, and heat up to 85°C for 1.5h; after the reaction is complete, filter the product with suction, wash, and dry to obtain 7wt.% γ-MnO 2 -Sepiolite clay / cordierite clay low-temperature denitrification catalyst.

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Abstract

The invention belongs to the field of denitration catalyzing, and provides a gamma-MnO2 loaded mixed non-metal ore clay low-temperature denitration catalyst and a preparation method thereof. According to the catalyst, mixed non-metal ore clay is adopted as a carrier, an active component gamma-MnO2 is loaded, and the gamma-MnO2 loaded mixed non-metal ore clay low-temperature denitration catalyst is prepared. The catalyst is simple in preparation process, the prepared catalyst can achieve the effects of increasing the specific area, the pore volume and the aperture, and the strength of the catalyst is increased, so that the catalyst is easy to form and convenient to mount. In addition, the non-metal ore clay is low in price, and therefore the cost of the catalyst is greatly reduced.

Description

technical field [0001] The invention belongs to the field of denitrification catalysis, in particular to a mixed non-metallic ore clay loaded γ-MnO 2 Low temperature denitrification catalyst. Background technique [0002] Ammonia Selective Catalytic Reduction of NO x (NH 3 -SCR) is considered to be the most widely used flue gas denitrification technology in the world. This method has the advantages of no side effects, no secondary pollution, simple device structure, and high removal rate. However, the currently used V-W-Ti series of commercial catalysts have carrier TiO 2 Expensive, poor mechanical strength, difficult to shape and other disadvantages; at the same time V 2 o 5 As an active component, the reaction temperature required is relatively high, generally required to be controlled at 573-673K, and it is toxic. Therefore, it is necessary to develop low-temperature, cheap and pollution-free SCR catalyst technology. Chinese patent CN 103381362 A discloses a nano-T...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/34
CPCB01J23/34
Inventor 罗士平周文挺周兴蒙吴凤芹姚超左士祥刘文杰李霞章
Owner CHANGZHOU UNIV
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