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A kind of supported catalyst, its preparation method and application
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A supported catalyst and application technology, applied in chemical instruments and methods, physical/chemical process catalysts, chemical elements of heterogeneous catalysts, etc., can solve problems such as poor catalyst stability, and achieve high low-temperature activity, simple and good preparation methods. The effect of the application foreground
Active Publication Date: 2021-08-31
NINGBO URBAN ENVIRONMENT OBSERVATION & RES STATION NUEORS CHINESE ACADEMY OF SCI +1
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But, the stability (poor stability of alkali metal) and catalytic activity of described catalyst also need to further improve
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Embodiment 1
[0094] A supported catalyst comprises a modifying agent, an active component and a carrier, wherein the modifying agent includes Cs, the active component includes tricobalt tetroxide, and the carrier includes a cerium-tin composite oxide solid solution.
[0095] Among them, the chemical composition of cerium-tin composite oxide is Ce 0.5 sn 0.5 o 2 , forming a cerium-tin solid solution, the mass percentage of Cs in the carrier is 1%, and the mass percentage of the active component in the carrier is 3wt%.
[0096] The preparation method of described catalyst comprises the following steps:
[0101] A supported catalyst comprises a modifying agent, an active component and a carrier, wherein the modifying agent includes Cs, the active component includes tricobalt tetroxide, and the carrier includes a cerium-tin composite oxide solid solution.
[0102] Among them, the chemical composition of cerium-tin composite oxide is Ce 0.5 sn 0.5 o 2 , forming a cerium tin solid solution, Cs accounts for 3% by weight of the carrier, and the active component accounts for 3 wt% of the weight of the carrier.
[0103] The preparation method of described catalyst removes CsNO in step (3) 3 The solution Cs is the same as that of Example 1, except that the mass percentage of the solution Cs in the carrier is 3%.
Embodiment 3
[0105] A supported catalyst comprises a modifying agent, an active component and a carrier, wherein the modifying agent includes Cs, the active component includes tricobalt tetroxide, and the carrier includes a cerium-tin composite oxide solid solution.
[0106] Among them, the chemical composition of cerium-tin composite oxide is Ce 0.5 sn 0.5 o 2 , forming a cerium tin solid solution, Cs accounts for 5% by mass of the carrier, and the active component accounts for 3wt% by mass of the carrier.
[0107] The preparation method of described catalyst removes CsNO in step (3) 3 The mass percentage of the solution Cs in the carrier is 5%, and the rest is the same as that of Example 1.
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technical field [0001] The invention belongs to the technical field of catalysts, and relates to a supported catalyst, its preparation method and application, in particular to a supported catalyst for low-temperature combustion of soot, its preparation method and application. Background technique [0002] Diesel engine because of its high fuel economy and low CO 2 emissions have received much attention. According to statistics in 2018, the number of diesel vehicles in my country accounted for 9.4% of the total number of vehicles in 2017, but their PM (particulate matter) emissions were close to 99% of the total vehicle emissions. It can be seen that diesel vehicles have become the main contributor to PM emissions from motor vehicles in my country. The emission of PM can not only cause environmental problems such as photochemical smog and smog, but also seriously threaten human health. Therefore, how to remove PM from diesel engine exhaust has received intense attention. ...
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