A honeycomb denitration catalyst with increased specific surface area and preparation method thereof

Abstract

The invention discloses a honeycomb denitration catalyst with increased specific surface area and a preparation method. The steps are as follows: (1) beating activated alumina; (2) dissolving titanium source precursor; (3) dissolving tungsten source precursor , and mix with the materials in steps (1) and (2); (4) Mix the materials in step (3) evenly and adjust the pH value to 8-13, precipitate, filter, and wash to obtain a filter cake; (5) Mix the materials in step (3) evenly to obtain a filter cake. 4) Add water to the obtained filter cake to make a slurry, add the vanadium source precursor solution, mix, dry and roast to form a powder; (6) Combine the solution formed by the molybdenum source precursor and the powder in step (5) Mix it into a slurry. After stirring, add a pore-forming agent. After stirring twice, let it stand and squeeze it into a honeycomb shape. After drying, the surface is coated with nanoscale tungsten oxide and roasted to obtain a denitration catalyst. The denitrification catalyst prepared by the invention can not only increase the specific surface area of ​​the catalyst, but also resist the uneven deposition of heavy metals in the flue gas on its surface.

Description

technical field [0001] The invention relates to a honeycomb denitration catalyst with increased specific surface area and a preparation method thereof, in particular to a denitration catalyst resistant to uneven deposition of vanadium in flue gas and a preparation method thereof, which belongs to the technical field of new inorganic materials. Background technique [0002] Nitrogen oxides (NO x ) is one of the main air pollutants, and the emission requirements are becoming increasingly stringent. my country's "Twelfth Five-Year Plan" Comprehensive Work Plan for Energy Conservation and Emission Reduction stipulates that by 2015, the total national nitrogen oxide emissions will drop by 10% compared with 2010. In September 2011, the Ministry of Environmental Protection promulgated GB13223-2001 "Emission Standards of Air Pollutants for Thermal Power Plants", which made stricter requirements on the NOx emission concentration of thermal power plants: it stipulates that the coal-f...

AI Technical Summary

Problems solved by technology

[0007] The main purpose of the present invention is to provide a honeycomb denitrification catalyst with increased specific surface area and its preparation method, so as to overcome the defect that the active center of the denitrification catalyst in the prior art is unbalanced in the high-temperature flue gas, and the catalyst of the present invention can resist smoke The uneven deposition of vanadium oxides on the surface of the channel gas increases the specific surface area of ​​the catalyst and improves the performance of the catalyst.

Images