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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Problems solved by technology

In semi-enclosed spaces such as parking lots and tunnels, due to the limitation of natural ventilation, vehicle exhaust polluta...

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.

Application Domain

Metal/metal-oxides/metal-hydroxide catalysts

Technology Topic

Cobalt oxideManganese oxide +10

Examples

Experimental program(5)

Example Embodiment

[0015] Example 1:

[0016] Weigh 1.48 g of manganese chloride and 6.51 g of cerium nitrate and dissolve them in 100 ml of deionized water to form solution 1. 1.52 g of potassium permanganate was weighed and dissolved 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, and dry the obtained solid in an oven at 50 °C overnight, and then calcinate at 300 °C for 3 hours to obtain cerium manganese oxide, 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 After immersion in an equal volume for 24 hours, it was placed in an oven at 60-80 °C to dry overnight, and then calcined at 300 °C for 3 hours to obtain a cobalt-supported cerium-manganese oxide catalyst, denoted as Co/Ce1-Mn-O x.

[0018] Weigh 0.200 g of the catalyst obtained above, feed the reaction gas at 25 ° C, and the gas composition is 10 ppm NO, 21% O 2 and balance gas N 2 ,, the total flow is 420mL/min, and the activity test results are: the purification rate reaches 89%, and the conversion rate remains above 70% within 150 minutes.

Example Embodiment

[0019] Example 2:

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

Example Embodiment

[0021] Example 3:

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

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Cobalt-load cerium manganese oxide catalyst and preparation method thereof

AI-Extracted Technical Summary

Problems solved by technology

Abstract

Examples

Example Embodiment

Example Embodiment

Example Embodiment

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Description & Claims & Application Information

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