Process for preparing SCR denitration catalyst and SCR denitration catalyst prepared by the method

Abstract

The invention relates to a method for preparing an SCR deNOx catalyst. The method comprises: 1. dissolving a certain amount of ferrous sulfate in water; 2. adding anatase type nanometer TiO2, wherein the mass ratio of ferrous sulfate to the TiO2 is 1: (2-30); 3. adding a silicate nanoporous material, wherein the mass ratio of the silicate nanoporous material to the TiO2 is 1 : (0.5-2) to stir evenly; 4. heating and stirring the obtained solution until the solution is dried, and drying the solution for 1 to 10 hours at a temperature of between 60 and 160 DEG C; and 5. burning the dried solution in the step 4 by oxygen for 0.5 to 5 hours at a temperature of between 200 and 350 DEG C, and calcining the dried solution in the presence of nitrogen at a temperature of between 350 and 450 DEG C for 4 to 48 hours to obtain the catalyst. Furthermore, the invention also relates to the SCR deNOx catalyst prepared by the method for preparing the SCR deNOx catalyst. The catalyst has arsenic poisoning resistance and sulfur oxidizing resistance, can be formed through various processes, and is applicable to electrical power and related enterprises in flue gas selective catalytic denitration and other energy environment-friendly industrial fields.

Description

technical field [0001] The invention relates to a preparation method of an SCR denitration catalyst and an SCR denitration catalyst prepared by the method. Background technique [0002] Nitrogen oxides (NOx) are one of the harmful substances in the exhaust gases of boilers and internal combustion engines. NOx has many hazards to environmental problems and human health. It is toxic to the human body. It is the main pollutant that forms acid rain and acid fog. It forms photochemical smog with hydrocarbons, which can destroy the ozone layer. It is also one of the greenhouse gases. Facing the severe environmental protection situation, in 2003, my country promulgated the new "Emission Standards of Air Pollutants for Thermal Power Plants", and the highest concentration of NOx emissions allowed by the state (standard state) is 450mg / m 3 (Vdaf>20%), and since July 2004, NOx sewage charges have been levied, and the standard is 0.63 yuan / kg. Due to the limitations of the low-nitr...

AI Technical Summary

Problems solved by technology

However, catalysts obtained from iron nitrate and chloride do not have the ability to simultaneously resist arsenic poisoning and sulfur dioxide oxidation