Method for in-situ generation of nano-flower-shaped manganese dioxide catalyst on filter material

Abstract

The invention discloses a method for in-situ generation of a nano-flower-shaped manganese dioxide catalyst on a filter material. The method comprises the following steps: soaking the filter material into a solution of lauryl sodium sulfate and nitric acid, and firstly, performing surface modification on the filter material by using the lauryl sodium sulfate so as to wind a charge layer on the surface of the filter material, wherein h<+> in the acid solution can be tightly adsorbed by the charge layer; adding potassium permanganate as an oxidant, enabling the potassium permanganate to react with H<+> on the surface of the filter material, and performing in-situ generation of nano-flower-shaped manganese dioxide on the surface of the filter material to prepare a composite filter material with a denitration function. As the filter surface of the filter material is uniformly wrapped by a layer of nano-flower-shaped manganese dioxide, and compared with common manganese dioxide, the manganese dioxide of the morphology is relatively large in specific surface area, relatively large in pore volume and relatively beneficial to expansion of a reaction gas, so that the catalytic filter material is very excellent in low-temperature activity, and the conversion rate can be 97% or above at 160 DEG C.

Description

technical field [0001] The invention belongs to the technical field of functional filter materials, and in particular relates to a method for in-situ generating a nano flower-shaped manganese dioxide catalyst on a filter material. Background technique [0002] my country is in a stage of rapid economic development, and the demand for energy is huge, especially the demand for electricity is increasing. However, my country's coal-themed energy structure determines that my country's electric power is dominated by thermal power generation, and most of the power plants are coal-fired power plants. In addition to ensuring rapid economic development, coal-fired power plants will produce a large amount of pollutants, such as dust, sulfur dioxide and NO x Toxic gas etc. At present, filter bag dust collectors are mainly used in the industry to control a large amount of dust and trace particles produced by coal-fired power plant boilers, and the core is the filter material. Among th...

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Problems solved by technology

However, its disadvantage is that dopamine is used to modify the surface of the filter material, and the uniformly coated polydopamine layer will affect the air permeability of the filter material, thereby affecting its dust removal function; and the preparation process is complicated

[0004] However, if the denitrification catalyst is directly attached to the filter fiber, there are disadvantages such as uneven catalyst loading, poor air permeability, poor low-temperature activity, and weak binding force between the catalyst and the filter fiber.

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