SCR (Selective Catalyctic Reduction) smoke denitration catalyst based on TiO2-SnO2 composite barrier and preparation method thereof

Abstract

The invention belongs to the field of environment friendliness and environment catalysis, in particular relates to an SCR (Selective Catalyctic Reduction) smoke denitration catalyst based on a TiO2-SnO2 composite barrier. The medium-low temperature smoke denitration catalyst based on the TiO2-SnO2 composite barrier is prepared by using nanometer TiO2-SnO2 as a carrier, WO3 and CeO2 as additives and V2O5 as an active component. By adopting the nanometer TiO2-SnO2 for replacing the traditional nanometer TiO2 as the carrier, the specific surface area, the thermal stability and the acidity of the catalyst are increased, the denitration activity of the catalyst is improved through interaction among the V2O5, the WO3 and the CeO2; and when ammonia is used as a reducing agent, better catalytic activity is expressed within a temperature range of 150-450 DEG C.

Description

technical field

[0001] The invention belongs to the field of environmental protection and environmental catalysis, in particular to a novel TiO-based 2 -SnO 2 SCR flue gas denitrification catalyst based on composite metal oxide carrier. Background technique

[0002] Nitrogen oxides in the air pollutants are easy to form acid rain and photochemical smog in the atmosphere, destroy the ozone layer and cause the greenhouse effect, which has brought serious harm to the natural environment and human health. 63% of NOx in nature comes from industrial pollution and traffic pollution, twice that of natural sources, of which 40% is from the power industry. According to statistics, about 60% of NOx in my country's air pollutants comes from coal combustion, so controlling the emission of nitrogen oxides from coal-fired boilers is a grim situation and an urgent task. Among various denitrification technologies, ammonia selective catalytic reduction (SCR) method is currently the main de...