Molybdenum-based low-temperature denitration catalyst and preparation thereof

Abstract

The invention discloses a molybdenum-based low-temperature denitration catalyst and a preparation thereof. The catalyst is characterized in that TiO2 is used as a carrier, the oxides of molybdenum are used as active components, one or more of the oxides of metals V, W, Cu, Ni, Zn and Ce are added as auxiliaries, and the active components in the prepared catalyst occupiy 1-15% of the catalyst. The preparation method of the catalyst comprises the steps of ultrasonic mixing, drying, crushing and roasting. By using ammonia as a reducing agent, the denitration efficiency can be up to 80% when the temperature is 130 DEG C and the temperature of an active window is 150-446 DEG C when the catalyst is up to 99%; and during the preparation, drying and roasting are carried out, then the specific surface area and the stability of the catalyst are improved and the service life of the catalyst is prolonged, so that the catalyst has good industrial application prospect. The catalyst is suitable for the smoke low-temperature denitration catalytic processes.

Description

technical field [0001] The invention belongs to the technical field of catalysts, and mainly relates to a preparation method of a low-temperature denitration catalyst. Background technique [0002] With the continuous tightening of my country's environmental protection policies, in order to achieve the total national nitrogen oxide emissions during the "Twelfth Five-Year Plan" period to be controlled at 20.462 million tons, which is 10% lower than the total target of 22.736 million tons in 2010, "the most stringent denitrification standard in history" "Starting from January 1, 2012, my country's denitrification technology and application will enter a large-scale development stage in the past five years. SCR flue gas denitrification technology will surely achieve large-scale application in the field of power plants due to its efficient and stable performance. Since the 1970s Japan developed the commercial V 2 o 5 / TiO 2 The medium-temperature catalyst in the system, the cat...

AI Technical Summary

Problems solved by technology

Some progress has been made in the research of low-temperature catalysts. At present, the research mainly focuses on the research of Mn-Ti low-temperature catalysts and Cu-Zr catalysts. The stability and life of the catalysts are not ideal, which affects the industrial production of catalysts.