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A kind of cobalt supported cerium manganese oxide catalyst and preparation method thereof

A technology of oxides and catalysts, applied in the direction of metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, chemical instruments and methods, etc., can solve the problems of pollutant enrichment and achieve simple process and low cost The effect of low and excellent oxygen storage and release capacity

Active Publication Date: 2017-11-10
SHANGHAI NAT ENG RES CENT FORNANOTECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In semi-enclosed spaces such as parking lots and tunnels, due to the limitation of natural ventilation, vehicle exhaust pollutants cannot be discharged in time to enrich the pollutants, and the resulting air pollution cannot be treated by this technology

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Weigh 1.48 g of manganese chloride, and dissolve 6.51 g of cerous nitrate in 100 ml of deionized water to form solution 1. Weigh 1.52 g of potassium permanganate and dissolve in 60 ml of deionized water to form solution 2. Add solution 2 dropwise to solution 1, continue stirring at room temperature for 24 hours, filter, wash, dry the obtained solid in an oven at 50°C overnight, and then roast at 300°C for 3 hours to obtain cerium manganese oxide, which is denoted as Ce1- Mn-O x .

[0017] Weigh 0.120 g of cobalt nitrate and dissolve it in 2.80 ml of deionized water to form a cobalt solution, then add the cobalt solution dropwise to 1.00 g of Ce1-Mn-O x In the same volume, after impregnating for 24 hours in an equal volume, place it in an oven at 60-80°C to dry overnight, and then bake it at 300°C for 3 hours to obtain a cobalt-supported cerium-manganese oxide catalyst, which is denoted as Co / Ce1-Mn-O x .

[0018] Weigh 0.200 g of the catalyst obtained above, and fee...

Embodiment 2

[0020] Compared with Example 1, the difference is that the quality of manganese chloride is 1.98 grams, and the quality of cerous nitrate is 4.34 grams, and the amount of other materials and operating conditions are the same as in Example 1 to obtain Co / Ce2-Mn-O x catalyst. The activity test results are: the purification rate reaches 92%, and the conversion rate remains above 70% within 290 minutes.

Embodiment 3

[0022] Compared with Example 1, the difference is that the quality of manganese chloride is 2.23 grams, and the quality of cerous nitrate is 3.26 grams. The amount of other materials and operating conditions are the same as in Example 1, and Co / Ce3-Mn-O x catalyst. The activity test results are: the purification rate reaches 96%, and the conversion rate remains above 70% within 480 minutes.

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Abstract

The invention discloses the preparation of a cobalt-loaded cerium-manganese oxide catalyst. The cerium-manganese oxide is prepared by an oxidation-reduction method, and then cobalt is loaded on the cerium-manganese oxide by an equal-volume impregnation method. The manganese oxide has good oxidation performance. Cerium oxide has excellent oxygen storage and release capacity, and cobalt oxide also has certain oxidation performance. The catalyst has good purification efficiency for low-concentration nitric oxide, and the conversion rate can reach 96% at 25°C, and it can also maintain a long The life of the catalyst is easy to obtain, the process is simple, the cost is low, and the catalyst is easy to realize industrial production.

Description

technical field [0001] The invention relates to the preparation of a cobalt-loaded cerium-manganese oxide catalyst and its application in the purification of low-concentration nitric oxide, and has application prospects in the field of environmental purification. Background technique [0002] With the continuous development of cities, the number of motor vehicles has increased significantly, and motor vehicles are a mobile source of pollution, because the fuel cannot be completely burned or incompletely burned in the internal combustion engine, resulting in such as soot, carbon monoxide (CO), hydrocarbons, etc. compounds (HC), nitrogen oxides (NO x ), lead (Pb), sulfur dioxide (SO 2 ) and other pollutants are discharged into the atmosphere and become harmful substances that pollute the atmospheric environment. According to statistics, 90% of the total air pollutants are pollutants emitted by mobile pollution sources such as automobiles. The purification technology for pol...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/889
Inventor 何丹农杨玲高振源赵昆峰蔡婷袁静张涛
Owner SHANGHAI NAT ENG RES CENT FORNANOTECH
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