Wide-temperature denitration catalyst and preparation method thereof

Abstract

The invention discloses a wide-temperature denitration catalyst and a preparation method thereof. The catalyst uses an antimony doped titanium dioxide nanorod array as a carrier, uses vanadium pentoxide as an active ingredient and uses molybdenum oxide and cerium oxide as auxiliary agents. The titanium dioxide nanorod array is directly grown on a base plate by a hydrothermal method; the combiningforce of titanium dioxide and the base plate is enhanced, so that the catalyst has high abrasive resistant intensity and long service life; through the ordered arrangement of the titanium dioxide nanorod array, the specific surface area can be improved; the active sites are increased; the catalyst activity is improved; titanium dioxide is subjected to antimony doping, so that the sulfur poisoningresisting performance of the catalyst can be enhanced. Cerium oxide and molybdenum oxide are loaded on the carrier, so that low-temperature activity of the catalyst can be improved; the reaction temperature is expanded; the catalyst has high denitration efficiency, high stability and high selectivity in a temperature range of 150 to 420 DEG C. The catalyst can be widely applied to various industrial furnace SCR denitration systems.

Description

technical field [0001] The invention relates to a wide-temperature denitrification catalyst and a preparation method thereof, belonging to the technical field of high-efficiency catalysts and air pollutant prevention and control. Background technique [0002] Selective catalytic reduction (SCR) denitrification is one of the most widely used and most mature flue gas denitrification technologies in the world. The core of its technology is the use of denitrification catalysts, which have the advantages of high purification rate and reliable operation. The denitrification catalyst used in coal-fired power plants has been commercially used for many years, and the technology is relatively mature. The operating temperature of this type of medium-high temperature catalyst is usually 320-420°C. However, in the face of the increasingly severe pollution control situation, the nitrogen oxide emissions of other industrial furnaces will also be strictly controlled. Coking, cement, glass, ...

AI Technical Summary

Problems solved by technology

The main problem facing these industrial furnaces and kilns in denitrification is the low flue gas temperature (180-350°C). Currently, commercial catalysts operating continuously in this temperature range have problems such as low denitrification activity, easy sulfur poisoning, and short service life. In addition, the cement industry with particularly high dust content in the flue gas also requires high mechanical strength of the catalyst. Existing commercial catalysts are prone to collapse or peel off under high dust washing, and the service life cannot be guaranteed.

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