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Preparation and test method of medium and low temperature supported denitrification catalyst with raw iron ore as carrier

A denitration catalyst and iron ore technology, applied in chemical instruments and methods, physical/chemical process catalysts, separation methods, etc., can solve the problems of poor low temperature activity and narrow activity temperature window, and achieve high low temperature activity and wide temperature window. , the effect of strong high temperature thermal stability

Active Publication Date: 2018-03-20
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It has changed the shortcomings of the previous supported denitrification catalyst carrier that the carrier does not have the catalytic denitrification function, and improved the problems of the existing catalysts such as narrow activity temperature window and poor low temperature activity.

Method used

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  • Preparation and test method of medium and low temperature supported denitrification catalyst with raw iron ore as carrier
  • Preparation and test method of medium and low temperature supported denitrification catalyst with raw iron ore as carrier
  • Preparation and test method of medium and low temperature supported denitrification catalyst with raw iron ore as carrier

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] The active material loading is 40% LaMnO 3 The preparation method steps of the low-temperature denitration catalyst of hematite are as follows:

[0032] Firstly, the hematite is crushed mechanically, and then the iron ore particles of 35-65 mesh are screened out, and then preheated at 320°C to obtain the hematite carrier; at the same time, 0.04mol La (NO 3 ) 3 •nH 2 O, 0.04mol Mn (NO 3 ) 2、 0.08mol C 6 h 8 o 7 ·6H 2O, put it into the beaker that has measured 50ml of deionized water successively, prepare the solution according to the ratio of 1:1:2, put it on the constant temperature magnetic stone stirrer, first stir and heat it in a water bath at 30°C for 0.5h , then weigh 24.2g of the previously obtained hematite (limonite) carrier, put it into the newly prepared solution, and then adjust the temperature of the constant temperature magnet stirrer to 80°C, stir and heat in a constant temperature water bath until the solvent evaporates Then transfer it to an ov...

Embodiment 2

[0034] The implementation steps are as in Example 1, other conditions remain unchanged, the amount of carrier hematite is changed to 27.66 g, and the active material loading is 35% LaMnO 3 / Hematite Catalyst.

Embodiment 3

[0036] The implementation steps are as in Example 1, other conditions remain unchanged, the amount of carrier hematite is changed to 32.26 g, and the active material loading is 30% LaMnO 3 / Hematite Catalyst.

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Abstract

The invention discloses a preparation and testing method of a medium-low temperature load-type denitrification catalyst using raw iron ore as a carrier. The modulation of the microenvironment of the carrier is used to realize the synergistic catalysis of the carrier and the perovskite active center, and at the same time, the interaction between the perovskite and the high specific surface carrier is used to enhance the hydrothermal stability and anti-sintering of the multi-component composite catalyst. ability etc. The invention provides a catalyst with wide material sources and low price and a preparation method thereof.

Description

technical field [0001] The invention relates to a general carrier of a catalyst, in particular to the preparation and application of a catalyst that takes raw iron ore as a carrier and supports perovskite or the like as an active component. Background technique [0002] Nitrogen oxides (NOx ) are one of the main air pollutants, which mainly come from the flue gas emitted by thermal power plants and motor vehicle exhaust. Therefore, countries around the world, especially developed countries, have strict restrictions on their emissions. NOx emission control includes combustion process control and flue gas denitrification after combustion. Among them, selective catalytic reduction denitrification technology (SCR ) is the most widely used flue gas denitrification technology at present, and the preparation of catalysts with wide temperature window, high activity and strong selectivity is the core of this technology. [0003] Commercial denitrification catalysts currently used i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/78B01J35/10B01D53/86B01D53/56
Inventor 王瑞归柯庭梁辉王晓波
Owner SOUTHEAST UNIV
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