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Cerium-based catalyst for benzene low-temperature catalytic removal, and preparation and application thereof

A cerium-based catalyst, low-temperature catalysis technology, applied in physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, heterogeneous catalyst chemical elements, etc., can solve the problem of ecological environment toxicity and high reaction temperature. , inapplicability and other problems, to achieve the effect of low cost, easy availability of raw materials and good performance

Inactive Publication Date: 2017-04-19
SHANGHAI NAT ENG RES CENT FORNANOTECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But V 2 o 5 The catalyst has obvious biological poisoning effect, which is toxic to the ecological environment, and the reaction temperature is high, so it is not suitable for boilers with low furnace temperature

Method used

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  • Cerium-based catalyst for benzene low-temperature catalytic removal, and preparation and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Weigh 1.79 grams of 50% manganese nitrate solution, 19.5 grams of cerium nitrate, dissolve in 200 milliliters of water, stir and dissolve at room temperature, add dropwise 30 milliliters of 2.9 mol / liter ammonium carbonate aqueous solution, continue to stir for 2 hours, filter and wash, 70 ℃ Dry in an oven for 12 hours, and then bake in a muffle furnace at 500° C. for 4 hours to obtain cerium manganese oxide Ce9Mn1.

[0019] Weigh 0.09 g of cobalt nitrate and dissolve it in 1.00 ml of deionized water to obtain the cobalt solution, add it dropwise to 1.0 g of Ce9Mn1 catalyst, impregnate it for 6 hours, put it in an oven at 70 ° C for 12 hours, and then put it in a muffle furnace for 500 Calcined at ℃ for 4 hours to obtain a 2.5%Co / Ce9Mn1 catalyst.

Embodiment 2

[0021] Compared with Example 1, the difference is that the quality of 50% manganese nitrate solution is 5.37 grams, the quality of cerium nitrate is 15.2 grams, and the concentration of ammonium carbonate aqueous solution is 2.7 mol / liter, and other operating conditions are identical with embodiment 1, obtain 2.5%Co / Ce7Mn3 catalyst.

Embodiment 3

[0023] Compared with Example 1, the difference is that the quality of 50% manganese nitrate solution is 16.1 grams, the quality of cerium nitrate is 2.17 grams, and the concentration of ammonium carbonate aqueous solution is 2.1 mol / liter, and other operating conditions are identical with embodiment 1, obtain 2.5%Co / Ce1Mn9 catalyst.

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Abstract

The invention discloses a cerium-based catalyst for benzene low-temperature catalytic removal, and preparation and application thereof. The catalyst is characterized in that cobalt doping cerium oxide is used as active ingredients, wherein the mol ratio of cobalt to cerium is (1:9) to (3:7); the catalyst is prepared by a citric acid sodium hydroxide method; the preparation method is simple; and the particles of the catalyst are uniform. Composite oxides formed by non-noble metal cobalt and cerium are used as active ingredients of the catalyst, so that the cost of the catalyst is greatly reduced; in addition, the catalyst provided by the invention has good catalytic oxidation activity at high air speed and low reaction temperature. The cobalt doping is used for modifying the cerium-based catalyst, so that the high-temperature catalytic oxidation activity on benzene series compounds is greatly improved; and the foundation is laid for the development of the cerium-based catalyst.

Description

technical field [0001] The invention relates to a cerium-manganese-loaded cobalt oxide low-temperature denitrification catalyst and a preparation method thereof, which are suitable for selective catalytic reduction of environmental pollutant NO and have application prospects in the field of environmental purification. Background technique [0002] NOx is a common main pollutant in the atmosphere. As a primary pollutant, it will cause a variety of direct harm to any animal and plant, and NO can also be converted into NO through photochemical oxidation. 2 , which in turn form nitric acid and nitrous acid, the main contributors to acid rain. my country's NOx emissions are mainly concentrated in industries such as thermal power and cement, as well as exhaust emissions from motor vehicles. [0003] At present, flue gas denitrification technologies that are widely used are mainly selective non-catalytic reduction technology (SNCR) and selective catalytic reduction technology (SCR...

Claims

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Application Information

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IPC IPC(8): B01J23/889B01D53/86B01D53/56
CPCB01D53/8628B01D2251/2062B01D2258/0283B01J23/002B01J23/8892B01J2523/00B01J2523/3712B01J2523/72B01J2523/845
Inventor 何丹农蔡婷赵昆峰高振源袁静杨玲张涛金彩虹
Owner SHANGHAI NAT ENG RES CENT FORNANOTECH
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