Preparation method of non-noble metal CDPF catalyst based on sodium metavanadate
A sodium metavanadate, non-precious metal technology, applied in the field of catalyst and its preparation, can solve the problems of increased possibility of migration and evaporation, poor durability, etc., and achieves the advantages of preventing agglomeration, simple preparation method and increasing contact area. Effect
Pending Publication Date: 2022-01-04
同济大学移动源后处理研究院
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Problems solved by technology
[0007] On the one hand, molten salt-type catalysts fully exert their catalytic activity by changing to a liquid phase, and on the other hand, the possibility of migration and evaporation increases, so the durability of existing molten salt-type catalysts is inferior to that of noble metal catalysts
Method used
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Embodiment 1
[0025] like figure 1 Shown, a kind of preparation method based on the non-precious metal CDPF catalyst of sodium metavanadate comprises the steps:
[0026] Step S1 Catalyst preparation: first prepare a sodium metavanadate catalyst solution through sodium chloride and vanadium pentoxide, and make a mixed solution with the loading components, then dry, roast and pulverize the mixed solution in sequence to make a particle size 2~1000μm catalyst particles;
[0027] In step S2, add the catalyst particles pulverized in step S1 into deionized water, stir, mix evenly, then add sol and thickener, mix and stir to form a slurry, and finally, adjust the pH value of the slurry to 3 by adding sulfuric acid ~5 between;
[0028] Step S3 Slurry coating and firing: Coating the catalyst slurry on the cordierite carrier with a coating amount of 5-15g / L through the coating device, and the coated catalyst is placed in an environment of 100-200°C Carry out drying and drying for 3~7h, and finally,...
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Abstract
The invention provides a preparation method of a non-noble metal CDPF catalyst based on sodium metavanadate, sodium metavanadate is used as a catalytic active component, the catalytic active component is supported and dispersed on a cordierite carrier through a supporting component to prepare a monolithic catalyst, and the supporting component is selected from one of alumina, silicon carbide and cerium dioxide. The preparation method is simple, and the prepared catalyst has a large specific surface area, good combustion performance and high durability. According to the catalyst coating, sodium metavanadate serves as a catalytic active component, O2 is activated, active oxygen is generated, and then the active oxygen reacts with PM; and the catalytic active component is supported and dispersed on the cordierite carrier through the supporting component to prepare the monolithic catalyst, and the supporting component not only increases the contact area between the catalytic active component and PM, but also prevents the agglomeration effect of a catalytic active center.
Description
technical field [0001] The invention relates to the field of catalyst and its preparation. Specifically, it relates to a preparation method of a sodium metavanadate-based non-noble metal CDPF catalyst. Background technique [0002] Combustion of fossil fuels is an important cause of air pollution, among which PM2.5 is the most harmful to human body. PM2.5 will gather a large number of harmful substances such as organic pollutants, toxic heavy metals, and acidic oxides, and penetrate into human organs and blood systems, causing respiratory diseases and endangering human health. [0003] Fuel emissions from mobile sources such as motor vehicles, aircraft, ships and non-road mobile machinery are one of the important sources of PM2.5. In order to deal with the hazards of mobile emission sources to the atmospheric environment and human health, countries around the world are actively formulating emission regulations to limit the emission of mobile sources. [0004] In recent ye...
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IPC IPC(8): B01J23/22B01J37/02B01J27/224B01J35/10B01J37/08F01N3/035F01N3/20F01N3/28
CPCB01J23/22B01J37/0215B01J27/224B01J37/08B01J23/002F01N3/20F01N3/2803F01N3/035B01J35/61
Inventor 楼狄明陈雅娟石健谭丕强张允华房亮
Owner 同济大学移动源后处理研究院