Modified manganese oxide catalyst, preparation method and application thereof

A manganese oxide and catalyst technology, applied in the field of modified manganese oxide catalyst and its preparation, can solve the problems of unfavorable industrial application and high catalyst cost, and achieve the effects of excellent catalytic oxidation performance, excellent resistance to high space velocity, and performance improvement

Active Publication Date: 2020-01-10
NINGBO URBAN ENVIRONMENT OBSERVATION & RES STATION NUEORS CHINESE ACADEMY OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] CN106732584A discloses a catalyst in which platinum is carried on cerium-yttrium composite oxides. The catalyst uses cerium-yttrium composite oxides with a nano-cube structure as a carrier, platinum as an active component, and the platinum is supported on the surface in the form of single atoms or nanoparticles. The surface of the cerium-yttrium composite oxide, but the catalyst described in this scheme needs to use noble metal as the active component, which makes the cost of the catalyst higher, which is not conducive to industrial application

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  • Modified manganese oxide catalyst, preparation method and application thereof
  • Modified manganese oxide catalyst, preparation method and application thereof
  • Modified manganese oxide catalyst, preparation method and application thereof

Examples

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Embodiment 1

[0087] The preparation method of modified manganese oxide catalyst:

[0088] (1) preparing manganese oxide, the preparation method of described manganese oxide comprises the following steps:

[0089] (1) add glacial acetic acid in the manganese acetate aqueous solution that concentration is 0.75mol / L, obtain the first mixed solution, the mol ratio of manganese acetate and glacial acetic acid in the first mixed solution of gained is 1:3;

[0090] (2) concentration is that the aqueous potassium permanganate solution of 0.32mol / L is added in the first mixed solution of step (1) gained, obtains the second mixed solution, the potassium permanganate in the described potassium permanganate aqueous solution and step ( 1) The molar ratio of manganese acetate in the manganese acetate aqueous solution is 0.87:1

[0091] (3) subjecting the second mixed solution obtained in step (2) to hydrothermal treatment at 100°C for 24 hours, and roasting at 700°C for 3 hours to obtain the manganese ...

Embodiment 2

[0094] The difference between this embodiment and embodiment 1 is that in step (II) Co(NO 3 ) 2 ·6H 2 The concentration of O aqueous solution is replaced by 6.81×10 -3 mol / L, other conditions are identical compared with embodiment 1;

[0095] The loading capacity of Co element on the catalyst obtained in this example is 1%, and the catalyst is recorded as 1% Co / MnO x .

Embodiment 3

[0097] The difference between this embodiment and embodiment 1 is that in step (II) Co(NO 3 ) 2 ·6H 2 The concentration of O aqueous solution is replaced by 20.4×10-3 mol / L, other conditions are identical compared with embodiment 1;

[0098] The loading capacity of Co element on the catalyst obtained in this embodiment is 3%, and the catalyst is recorded as 3% Co / MnO x .

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Abstract

The invention relates to a modified manganese oxide catalyst, a preparation method and application thereof. The catalyst is obtained by loading a transition metal element to manganese oxide serving asa carrier, is rich in surface oxygen vacancies on the surface, and has excellent activation capability on oxygen and nitric oxide, so that the catalyst provided by the invention has excellent catalytic activity. Also, the catalyst has excellent selectivity on CO2 during catalytic oxidation of soot particles, and the selectivity on CO2 is close to 100% in a catalytic reaction interval of 300-550DEG C.

Description

technical field [0001] The invention belongs to the field of environmental catalysis, and relates to a modified manganese oxide catalyst and its preparation method and application. Background technique [0002] A large amount of particulate matter emissions will not only cause environmental pollution such as haze weather, but also seriously threaten people's physical and mental health. Therefore, it is urgent to focus on the control of particulate matter emissions. According to the monitoring data released by the Environmental Protection Bureau, the emission of particulate matter comes from motor vehicles, dust, industry, life, etc., among which motor vehicles are the main source of pollution. The 2018 annual report on the environmental management of motor vehicles shows that diesel vehicles in motor vehicles contribute nearly 100% to particulate matter. Therefore, controlling the emission of particulate matter from diesel vehicles is a necessary measure to control haze. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/889B01D49/00
CPCB01J23/8892B01D49/00Y02A50/2351
Inventor 贺泓王猛张燕单文坡邓华
Owner NINGBO URBAN ENVIRONMENT OBSERVATION & RES STATION NUEORS CHINESE ACADEMY OF SCI
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