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Low-temperature denitration catalyst and preparation method and application thereof

A low-temperature denitrification and catalyst technology, which is applied in the direction of catalyst activation/preparation, chemical instruments and methods, heterogeneous catalyst chemical elements, etc., can solve the problems of poor low-temperature removal performance and achieve low cost, simple preparation process, excellent resistance Effects of High Mercury Performance

Active Publication Date: 2020-08-14
CENT SOUTH UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Aiming at the problem that the denitrification catalyst in the prior art is difficult to apply to the low temperature flue gas denitrification after dust removal due to poor low temperature removal performance, the first purpose of the present invention is to provide a catalyst with better denitrification performance and activity at lower temperatures. Composite denitrification catalyst with wide temperature range, tolerance to high mercury environment and no secondary pollution

Method used

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  • Low-temperature denitration catalyst and preparation method and application thereof
  • Low-temperature denitration catalyst and preparation method and application thereof
  • Low-temperature denitration catalyst and preparation method and application thereof

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Embodiment 1

[0055] Take 0.753g manganese nitrate Mn(NO 3 ) 2 4H 2 O and 0.27g cerium nitrate Ce(NO 3 ) 2 ·6H 2 O, dissolve it in 30mL of deionized water to make an impregnation solution; use γ-Al with a diameter of 1.5-2mm 2 o 3 As a catalyst carrier, wet impregnation method was used to weigh 3g γ-Al 2 o 3 Immerse in the solution; immerse in ultrasonic for 4 hours, vacuum distill to remove excess deionized water, and then dry the obtained catalyst for 12 hours at 105°C for 2 hours, then the catalyst is placed in N 2 Under the atmosphere, the temperature was raised to 600°C at a rate of 5°C / min, and fired at this temperature for 3h. N 2 Blow and cool, obtain catalyst MnOx (5%)-CeOx (3%) / γ-Al 2 o 3 . The resulting catalyst was placed under Hg 0 The concentration is 230~260mg / m 3 Adsorbed in the flue gas for 5h to get Hg-MnOx(5%)-CeOx(3%) / γ-Al 2 o 3 .

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Abstract

The invention discloses a low-temperature denitration catalyst and a preparation method and application thereof. Catalytic active components of the denitration catalyst comprise manganese oxide, cerium oxide and mercury, the carrier is gamma-Al2O3, and the preparation method of the denitration catalyst comprises the following steps: loading manganese salt and cerium salt on the gamma-Al2O3 carrierthrough an impregnation method, and performing high-temperature activation and adsorption of doped mercury to obtain the denitration catalyst. The denitration catalyst can be used for SCR selective catalytic denitration, has good low-temperature denitration activity and high-mercury resistance, can realize high-efficiency NO removal within the range of 100-400 DEG C, has the removal rate of 90% and is simple in preparation process and low in cost and is beneficial to industrial production.

Description

technical field [0001] The present invention relates to a denitrification catalyst and its preparation method and application, in particular to a denitrification catalyst with high catalytic denitrification activity in a low-temperature, high-mercury environment, and also to a preparation method of a denitrification catalyst and a denitrification catalyst in selective catalytic denitrification Its application belongs to the field of air pollution emission control. Background technique [0002] my country is a resource-rich country, and the metal smelting industry occupies a key position in the process of economic development. However, the air pollutants emitted during the smelting process, such as NOx and heavy metal mercury, etc. The threat to the environment is enormous. NOx is an important precursor of the greenhouse effect, photochemical smog, acid rain and ozone layer destruction; therefore, countries all over the world pay more and more attention to the issue of NOx ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/34B01J37/02B01J37/04B01J37/08B01J37/34B01D53/86B01D53/56
CPCB01D53/8628B01J23/002B01J23/34B01J37/0201B01J37/04B01J37/082B01J37/343B01J2523/00B01J2523/31B01J2523/3712B01J2523/72Y02C20/10
Inventor 刘恢肖梦倩沈锋华陈昊刘操杨姝李青竹王庆伟杨卫春王海鹰杨志辉闵小波
Owner CENT SOUTH UNIV
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