Co oxide/BaCO3 catalyst for N2O catalytic decomposition and preparation method thereof

A catalytic decomposition and catalyst technology, which is applied in physical/chemical process catalysts, separation methods, chemical instruments and methods, etc., can solve the problems of low alkaline earth metal content, high cost, and no assistance, and can reduce high cost, improve activity, The effect of reducing coverage

A catalytic decomposition and catalyst technology, which is applied in physical/chemical process catalysts, separation methods, chemical instruments and methods, etc., can solve the problems of low alkaline earth metal content, high cost, and no assistance, and can reduce high cost, improve activity, The effect of reducing coverage

CN106799249AActive Publication Date: 2017-06-06DALIAN UNIV OF TECH
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  • Co oxide/BaCO3 catalyst for N2O catalytic decomposition and preparation method thereof
  • Co oxide/BaCO3 catalyst for N2O catalytic decomposition and preparation method thereof
  • Co oxide/BaCO3 catalyst for N2O catalytic decomposition and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0063] 1.0 g BaCO 3 Carrier powder (the measured surface area is 2.3m 2 / g) placed in 50ml of Co(NO 3 ) 2 ·6H 2 O aqueous solution, stirred at this temperature for 3 hours, then the solid obtained by adsorption and deposition was separated by suction filtration, washed with distilled water until neutral, dried at 110°C, and calcined at 500°C in air for 3 hours to obtain a Co oxide shell / BaCO 3 Catalyst powder. Then the catalyst powder is pressed into tablets, crushed and sieved to make 40-60 mesh Co oxide shell / BaCO 3 Catalyst, its measured surface area is 4.7m 2 / g.

Embodiment 2

[0065] Repeat Example 1, but with 25ml concentration of 0.2M Co(NO 3 ) 2 ·6H 2 O aqueous solution instead of 50ml concentration in embodiment 1 is 0.1M Co(NO 3 ) 2 ·6H 2 O aqueous solution. The specific surface of the obtained catalyst is 5.2m 2 / g.

Embodiment 3

[0067] Repeat Example 1, but with 12.5ml concentration of 0.4M Co(NO 3 ) 2 ·6H 2 O aqueous solution instead of 50ml concentration in embodiment 1 is 0.1M Co(NO 3 ) 2 ·6H 2 O aqueous solution. The specific surface of the obtained catalyst is 5.3m 2 / g.

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Abstract

The invention discloses a Co oxide / BaCO3 catalyst for N2O catalytic decomposition and a preparation method thereof. The catalyst uses BaCO3 or a mixture of the BaCO3 as a carrier; the Co oxide mainly exists on the surface of the BaCO3 carrier to form a Co oxide enrichment shell layer; the Ba / Co atomic ratio in the catalyst is greater than 0.5. The catalyst obtained by a preparation technology has the characteristics that (1) the specific surface of the catalyst is obviously higher than that of the BaCO3 carrier per se; (2) the high activity of the Co oxide on the N2O catalytic decomposition can be fully utilized, so that the cost of the catalyst is reduced; (3) the catalytic activity of the N2O decomposition is obviously higher than that of a catalyst, with identical composition, obtained by an impregnation method and a coprecipitation method.

Description

technical field [0001] The invention belongs to the technical field of environmental protection catalytic materials and air pollution control, and relates to a method for preparing N 2 O-catalyzed decomposition of shelled Co oxide / BaCO with high activity 3 Catalyst preparation techniques. Background technique [0002] N 2 O is produced in large quantities in the production engineering of adipic acid and nitric acid. Hydrocarbon selective catalytic reduction (HC-SCR) and hydrogen selective catalytic reduction (H 2 -SCR) process, also can produce N because of the selectivity of noble metal catalyst is not high 2 O. N 2 O is a far better than NO x more toxic and far more toxic than CO 2 and CH 4 Gases with a stronger greenhouse effect. In order to protect the atmospheric environment, the N produced in the above process must be 2 O is effectively eliminated. [0003] Effectively eliminate N in the above exhaust gas 2 One of the methods for O is to increase the above-...

Claims

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Application Information

Patent Timeline
06 Jun 2017
Publication
CN106799249A
IPC
B01J27/236; B01D53/86; B01D53/56
CPC
Y02C20/10; B01J27/236; B01D53/8628; B01D2258/06
Inventors
王新平; 吴星星