A preparation method of activated carbon catalyst for flue gas desulfurization and denitrification

Abstract

The invention discloses a preparation method of an active carbon catalyst used for flue gas desulphurization and denitration, and belongs to the technical field of flue gas treatment. The preparation method of the active carbon catalyst comprises the following steps: 1, doping TiO2 with Cu: adding a copper salt into a titanium alcohol salt solution, carrying out water-bath heating to form gel, drying the gel, and grinding and sintering the dried gel to obtain Cu-doped TiO2 powder; and 2, loading the Cu-doped TiO2 powder on active carbon: adding the Cu-doped TiO2 powder, a dispersant and a binder into water, impregnating the active carbon in the above obtained solution, carrying out ultrasonic vibration, drying the vibrated solution, heating the dried solution to 400-450 DEG C according to a rate of 3-6 DEG C / min, carrying out heat insulation, and cooling the heat-insulated solution to obtain the Cu-doped TiO2 loaded active carbon catalyst. The desulphurization rate of the catalyst reaches 93.2% or above, the denitration rate of the catalyst reaches 88.7% or above; after the catalyst is regenerated, the desulphurization rate reaches 88.4% or above, and the denitration rate reaches 83.8% or above; and the catalyst has no toxicity.

Description

technical field [0001] The invention belongs to the technical field of flue gas treatment, and specifically relates to a catalyst for flue gas desulfurization and denitrification, in particular to a method for preparing an activated carbon catalyst for flue gas desulfurization and denitrification. Background technique [0002] The flue gas emitted by coal boilers and thermal power plants contains various harmful components such as sulfur dioxide, nitrogen oxides, and dust, which pose a serious threat to my country's natural resources, ecosystems, and public health. Therefore, the corresponding environmental protection regulations require their emissions Getting stricter. [0003] Flue gas pollutant emission control technology is mainly to reduce SO in industrial flue gas 2 and NO X In order to reduce the damage to the environment caused by the pollutants emitted by industrial development, in the emission control technology of flue gas pollutants, SO 2 The removal technolog...

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Problems solved by technology

[0007] The preparation method of the above-mentioned carbon-based desulfurizer is relatively complicated, requiring more raw material components, and it does not mention whether the prepared catalyst also has the ability to remove nitrogen oxides

[0008] Patent CN102527369A discloses an activated carbon-supported rare earth metal oxide reduction denitration catalyst. The catalyst uses activated carbon as a denitration catalyst carrier, and uses rare earth metal cerium, or a dual component of lanthanum and cerium as a catalytic active component, to reduce nitrogen oxides. It has high denitrification efficiency, but the catalyst uses rare earth metals with high price as the catalyst active component, and it does not mention whether it also has good desulfurization efficiency

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