SULFUR-RESISTANT AND WATER-RESISTANT MANGANESE-BASED LOW-TEMPERATURE DENITRATION CATALYST AND PREPARATION METHOD THEREFOR

摘要

The present invention relates to the technical filed of catalyst preparation, and provides a sulfur-resistant and water-resistant manganese-based low-temperature denitration catalyst and a preparation method therefor. The catalyst comprises a sulfur-resistant auxiliary, an active component, and a hydrophobic substance. A carrier of the catalyst is a titanium dioxide nanotube synthesized by means of a hydrothermal method using a waste SCR catalyst as the raw material. In the present invention, a titanium dioxide nanotube precursor is prepared from closed hydrothermal reaction of a waste SCR low-temperature denitration catalyst, and is used as a raw material for preparing a honeycomb low-temperature denitration catalyst, and the prepared manganese-based low-temperature denitration catalyst with high sulfur resistance, water resistance, and low cost significantly reduces production costs, enhances sulfur resistance and water resistance, and the denitration efficiency is obviously higher than that of a low-temperature denitration catalyst applied in the industry at present. The technique of the present application not only facilitates resource saving and improves resource reutilization, but also solves the problem of low specific surface area and small pore volume of the existing titanium dioxide and achieves the industrial application and promotion of the manganese-based low-temperature denitration catalyst.