Preparation method of anti-ammonium bisulfate flat plate type denitration catalyst and obtained catalyst

Abstract

The invention relates to the technical field of selective catalytic reduction catalysts, in particular to a preparation method of an anti-ammonium bisulfate flat plate type denitration catalyst and the obtained catalyst. According to the preparation method, a preparation process of firstly preparing the catalyst single plate for forming and then impregnating the active component is adopted, the catalyst single plate is calcined at a relatively high calcination temperature, the wear resistance of the catalyst is improved, the activity of the catalyst is ensured, the active component is mainly distributed on the surface of the paste material, the reaction area of SO2 on the monolithic catalyst is effectively reduced, and the SO2 / SO3 conversion rate is reduced. A hydrophobic molecular sieve and a competitive adsorbent are also added, so that the adsorption of H2O in flue gas on the surface of the catalyst is reduced, the capture of SO2 is realized, the contact between SO2 and active components of the catalyst and the generation of SO3 are reduced, the SO2 reaction area is reduced, and the ammonium bisulfate resistance of the catalyst is improved.

Description

technical field [0001] The invention relates to the technical field of selective catalytic reduction catalysts, in particular to a preparation method of an ammonium bisulfate-resistant planar denitration catalyst and the obtained catalyst. Background technique [0002] It is well known that nitrogen oxides (NO x ) is a harmful gas and a major air pollutant, which can not only cause acid rain, photochemical smog, the greenhouse effect and the destruction of the ozone layer; Pollution is a serious hazard to human health. 90% SO in air pollutants 2 and 70% NO x From the combustion of coal, the energy structure dominated by coal leads to a high total amount of air pollutant emissions, and potential environmental problems continue to emerge. The NO emitted by industrial boilers and kilns (such as ceramic kilns, glass kilns) x It accounts for about 23% of the total nitrogen oxide emissions. [0003] At present, coal-fired power plants generally use selective catalytic reducti...

AI Technical Summary

Problems solved by technology

In the preparation technology of the anti-ammonium bisulfate denitration catalyst disclosed in the above invention, the carrier is mixed with the active component and then calcined. In order to avoid the sintering of the active component and reduce the activity, the calcination temperature is low, and the wear resistance of the obtained catalyst is poor. The stability is not strong, the denitrification activity is greatly reduced after a period of use, the service life is short, and the SO 2 / SO 3 higher conversion rate

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