Preparing and testing method of medium-low-temperature loaded denitration catalyst taking raw iron ore as carrier

A denitration catalyst, iron ore technology, applied in chemical instruments and methods, physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, etc., can solve problems such as narrow active temperature window and poor low temperature activity , to achieve the effect of wide temperature window, high low temperature activity and wide source

Active Publication Date: 2016-01-06
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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  • Preparing and testing method of medium-low-temperature loaded denitration catalyst taking raw iron ore as carrier
  • Preparing and testing method of medium-low-temperature loaded denitration catalyst taking raw iron ore as carrier
  • Preparing and testing method of medium-low-temperature loaded denitration catalyst taking 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, 0.04molLa (NO 3 ) 3 ·nH 2 O, 0.04molMn (NO 3 ) 2、 0.08molC 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 oven ...

Embodiment 2

[0034] Implementation steps are as example 1, other conditions are constant, change carrier hematite amount to be 27.66g, make active material loading capacity be 35%LaMnO 3 / Hematite Catalyst.

Embodiment 3

[0036] The implementation steps are as example 1, other conditions are constant, the amount of carrier hematite is changed to 32.26g, and the obtained active material load is 30%LaMnO 3 / Hematite Catalyst.

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Abstract

The invention discloses a preparing and testing method of a medium-low-temperature loaded denitration catalyst taking raw iron ore as a carrier. The preparing method adopts a citric acid complexation method, loads an active component perovskite on a carrier, and fully utilizes the modulation of carrier microenvironment, so as to realize synergistic catalysis of the carrier and a perovskite active center; meanwhile through interaction of perovskite and the carrier with the high specific surface area, the hydrothermal stability, the anti-sintering ability and the like of a multiplex catalyst can be improved. The catalyst provided by the invention is wide in material source and low in cost, and the invention further provides a preparation method of the catalyst.

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 currently the most widely used flue gas denitrification technology, 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 in C...

Claims

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Application Information

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Patent Type & Authority Applications(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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