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A kind of co-scr denitrification catalyst and its preparation method and application

A CO-SCR and denitrification catalyst technology, applied in the field of industrial catalysis, can solve the problems of low NOx removal efficiency, achieve the effect of improving poisoning effect, uniform microstructure distribution, and easy promotion

Active Publication Date: 2021-03-12
SHANDONG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] In order to solve the deficiencies of the prior art, the purpose of the present invention is to provide a CO-SCR denitrification catalyst and its preparation method and application. The catalyst has good water resistance and can effectively solve the problem of CO + O 2 to solve the problem of low catalytic NOx removal efficiency of existing materials under the dual interference conditions of water vapor and oxygen

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  • A kind of co-scr denitrification catalyst and its preparation method and application

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Embodiment approach

[0038] The third embodiment of the present invention provides an application of the above-mentioned CO-SCR denitration catalyst in flue gas treatment.

[0039] In one or more examples of this embodiment, the flue gas contains water vapor and oxygen.

[0040] In order to enable those skilled in the art to understand the technical solution of the present invention more clearly, the technical solution of the present invention will be described in detail below in conjunction with specific examples and comparative examples.

Embodiment 1

[0042] Weigh cerium ammonium nitrate (Ce(NH 4 ) 2 (NO 3 ) 6 ) 15.81g, 50wt% manganese nitrate aqueous solution (Mn(NO 3 ) 2 50wt%H 2 O) 41.3g was added into deionized water to dissolve according to the ratio of Mn:Ce=4:1, and then stirred at 70°C for 60min to obtain mixed salt solution A. Weigh a certain amount of Na 2 CO 3 Dissolved in deionized water to make alkaline precipitant Na 2 CO 3 solution. Under the condition of stirring at 40°C, Na 2 CO 3 Alkaline precipitating agent and stirring until the pH of the mixed solution = 8 to obtain a mixture C. The mixture C was aged at room temperature for 2 h, then filtered and washed repeatedly with deionized water until the pH of the filtrate was 7, and the filter cake D was obtained. The filter cake D was placed in a ball mill for 120 min at a speed of 420 r / min to obtain powder E. The powder E was dried in an oven at 110° C. for 12 hours, and finally calcined and activated in a muffle furnace at 500° C. for 5 hours ...

Embodiment 2

[0044] Weigh copper nitrate trihydrate (Cu(NO 3 ) 2 ·3H 2 O) 9.462g, 50wt% manganese nitrate aqueous solution (Mn(NO 3 ) 2 50wt%H 2 O) 126.152g was added into deionized water to dissolve in the ratio of Mn:Cu=9:1, and then stirred at 70°C for 60min to obtain mixed salt solution A. Weigh a certain amount of Na 2 CO 3 Dissolved in deionized water to make alkaline precipitant Na 2 CO 3 solution. Under the condition of stirring at 40°C, Na 2 CO 3 Alkaline precipitating agent and stirring until the pH of the mixed solution = 8 to obtain a mixture C. The mixture C was aged at room temperature for 2 h, then filtered and washed repeatedly with deionized water until the pH of the filtrate was 7, and the filter cake D was obtained. The filter cake D was placed in a ball mill for 120 min at a speed of 420 r / min to obtain powder E. The powder E was dried in an oven at 110° C. for 12 hours, and finally calcined and activated in a muffle furnace at 500° C. for 5 hours to prepar...

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Abstract

The invention provides a CO-SCR denitration catalyst and a preparation method and application thereof.The preparation method comprises the steps that a precipitant is added into a solution of mixed metal salt to obtain precipitate, ball-milling treatment is conducted on the precipitate to obtain powder, and the powder is heated to 450-850 DEG C to be calcined; wherein the mixed metal salt is a manganese salt and other metal salts, and the other metal salts are one or more of a copper salt, an iron salt, a cerium salt, a cobalt salt and a nickel salt. The catalyst provided by the invention hasgood water resistance, effectively solves the problem of CO + O2 competition in the CO-SCR catalytic process, and overcomes the defect of low catalytic NOx removal efficiency of an existing material under the double interference conditions of water vapor and oxygen.

Description

technical field [0001] The invention belongs to the field of industrial catalysis in chemical engineering, and relates to a CO-SCR denitration catalyst, a preparation method and an application. Background technique [0002] The information disclosed in this background section is only intended to increase the understanding of the general background of the present invention, and is not necessarily taken as an acknowledgment or any form of suggestion that the information constitutes the prior art already known to those skilled in the art. [0003] Nitrogen oxides and carbon monoxide are two kinds of air pollutants in industrial production and life in modern society, which are very harmful to human health and the environment. Nitric oxide is the main component of nitrogen oxides, mainly from steel plants, thermal power plants, automobile exhaust, etc. Among various denitrification technologies, NH 3 -SCR technology has become the most widely used and mature denitrification tec...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/34B01J23/889B01D53/86B01D53/56
CPCB01D53/8628B01D2257/404B01D2258/0283B01J23/002B01J23/34B01J23/8892B01J2523/00B01J2523/17B01J2523/72B01J2523/842
Inventor 程星星李向东王志强付加鹏马春元王鹏
Owner SHANDONG UNIV
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