Flue gas low temperature denitration cobalt manganese oxide catalyst and preparation method thereof

Abstract

The invention discloses a flue gas low temperature denitration cobalt manganese oxide catalyst and a preparation method thereof, and belongs to the technical field of flue gas denitration catalysts. The active components of the catalyst comprise a cobalt oxide, a manganese oxide and a cobalt manganese oxide solid solution; the method is as follows: a cobalt salt and a manganese salt are used as raw materials, anhydrous sodium carbonate or ammonia water is used as a precipitant, first, a cobalt salt and manganese salt mixed water solution is prepared, then a precipitant solution is prepared, and a cobalt manganese oxide catalyst product is prepared. The method has the advantages of conventional raw materials, simple preparation method and the like; the cobalt manganese oxide catalyst prepared by the method has simple components, low cost, high NOx removal efficiency and other advantages. The method can be widely used for preparing the flue gas low temperature denitration cobalt manganese oxide catalyst, and the catalyst prepared by the method can be widely applied in low temperature removal of NOx in flue gas, and is especially suitable for low temperature removal of the NOx in the flue gas of a coal-fired power plant.

Description

technical field [0001] The invention belongs to the technical field of flue gas denitrification catalysts, and in particular relates to a flue gas low-temperature denitrification catalyst and a preparation method thereof. technical background: [0002] From a short-term perspective, my country's coal-based energy structure is difficult to change, and will continue to maintain a proportion as high as 70% in the next 30 to 50 years. Among them, the coal consumption of coal-fired power plants exceeds 1% of my country's annual coal production. / 3. The flue gas produced by coal-fired power plants contains a variety of air pollutants, such as dust, SO 2 , NO x (Nitrogen oxides). of which NO x Emissions into the atmosphere can form acid rain, photochemical smog, and even destroy the ozone layer. Current coal-fired power plants NO x emissions accounted for the national NO x more than half of the emissions. According to GB13223-2011 "Regulations on Air Pollution Emission Stand...

AI Technical Summary

Problems solved by technology

The main disadvantages of this product are: ①The active ingredient in the catalyst is only manganese oxide, and the catalyst cannot effectively oxidize NO to produce NO 2 , so NO x The reaction will be removed only by standard SCR, and the activity of the catalyst is limited; ② During the preparation of the catalyst, the raw materials are all dissolved or dispersed in the alcohol solution, the preparation cost is high, it is not suitable for industrial applications, and a variety of acids are used in the preparation process Alkali, waste liquid treatment is not easy to cause environmental pollution

Images