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Manganese-iron-cobalt monolithic SCR low-temperature catalyst preparation method, product and application thereof

A catalyst and monolithic technology, which is applied in the field of preparation of denitrification catalysts and manganese-iron-cobalt monolithic SCR low-temperature catalysts, can solve environmental pollution, unfriendly environment and other problems, achieve simple preparation process, uniform catalyst coating, and facilitate large-scale industrialization The effect of using

Inactive Publication Date: 2018-01-05
SHANGHAI NAT ENG RES CENT FORNANOTECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, vanadium-based catalysts are environmentally unfriendly catalysts, and the loss during use and the treatment after deactivation will pollute the environment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Put 1L of cordierite honeycomb ceramic carrier into 120mL of a mixed aqueous solution of 4.3 mol / L manganese nitrate, 0.5 mol / L ferric nitrate, and 0.5 mol / L cobalt nitrate. Into 100 mL of concentrated ammonia solution, the concentrated ammonia solution was completely absorbed by the carrier, dried in an oven at 100°C after standing for 2 hours, and then roasted in a muffle furnace at 400°C for 4 hours.

[0022] Catalyst evaluation method is the same as Comparative Example 1. The test results are shown in Table 1.

Embodiment 2

[0024] Change the concentrations of iron nitrate and cobalt nitrate in Example 1 to 0.75 mol / L and 0.25 mol / L, and all the other preparation methods are the same as in Example 1. Catalyst evaluation method is the same as comparative example. The test results are shown in Table 1.

Embodiment 3

[0026] Change the concentration of iron nitrate and cobalt nitrate in Example 1 to 0.25 mol / L and 0.75 mol / L, and all the other preparation methods are the same as in Example 1. Catalyst evaluation method is the same as comparative example. The test results are shown in Table 1:

[0027] .

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Abstract

The invention relates to a manganese-iron-cobalt monolithic SCR low-temperature catalyst and a preparation method and application thereof. Active components are manganese oxide, iron oxide, cobalt oxide or two or three composite oxides thereof; and a carrier is a cordierite carrier. The preparation method comprises the following steps: dissolving manganous nitrate, ferric nitrate and cobalt nitrate in water, putting cordierite honeycomb ceramics into the nitrate aqueous solution, putting the carrier into a concentrated ammonia solution, and drying and roasting to prepare the manganese-iron-cobalt monolithic SCR low-temperature catalyst. The preparation method is economical and environment-friendly. Raw materials are fully utilized in the preparation process, there is no need to introduce an adhesive, and no waste liquid or refuse is generated. The preparation technology is simple and is convenient to use for large-scale industrialization. The catalyst film is uniform and is not easy tofall off from cordierite. Under the synergistic effect of the three oxides including manganese oxide, iron oxide and cobalt oxide, low temperature denitration performance of the catalyst is excellent, denitration rate within 125-200 DEG C can reach 80% and above, and the highest denitration performance reaches 95%.

Description

technical field [0001] The invention relates to a denitration catalyst, in particular to a preparation method, product and application of a manganese-iron-cobalt monolithic SCR low-temperature catalyst, belonging to the technical field of industrial denitration. Background technique [0002] NOx in the atmosphere has a strong stimulating effect on the human respiratory system, which can easily cause bronchitis, emphysema and even cancer. At the same time, nitrogen oxides can cause environmental pollution. After being discharged into the atmosphere, they react with oxygen and water to form acid rain and acid fog, and form photochemical smog with hydrocarbons. More than 90% of NOx in air pollutants is caused by the combustion of fuels such as coal, oil, and natural gas. With the rapid development of my country's economy, energy consumption has increased significantly. It is estimated that by 2020, the NOx emissions caused by national energy consumption will be The total amount...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/889B01D53/90B01D53/86
Inventor 何丹农高振源杨玲赵昆峰袁静蔡婷张涛金彩虹
Owner SHANGHAI NAT ENG RES CENT FORNANOTECH
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