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Cobalt-load 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, etc., and achieve simple and excellent processes Oxygen storage and release capacity, low cost effect

Active Publication Date: 2016-02-03
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, 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 feed reaction gas at 2...

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. Other material consumption and operating conditions are the same as in Example 1, and 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. Other material consumption 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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PUM

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Abstract

The invention discloses preparation of a cobalt-load cerium manganese oxide catalyst. Cerium manganese oxide is prepared through an oxidization reduction method, then cobalt is loaded to the cerium manganese oxide through an equivalent-volume impregnation method, manganese oxide has good oxidization performance, cerium oxide has excellent oxygen storage and release capacity, cobalt oxide also has certain oxidization performance, the catalyst has good purifying efficiency on low-concentration nitric oxide, the conversation rate can be 96% at the temperature of 25 DEG C, long service life can also be kept, meanwhile raw materials for preparing the catalyst are easy to obtain, the technology is simple, cost is low, and industrial production can be achieved easily.

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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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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