Low-temperature sulfur-resistant vanadium-titanium denitration catalyst and preparing method

Abstract

A low-temperature sulfur-resistant vanadium-titanium denitration catalyst and a preparing method are disclosed and belong to the field of denitration catalysts. The low-temperature sulfur-resistant vanadium-titanium denitration catalyst is prepared with a steeping method, anatase type titanium dioxide serves as a carrier, and vanadium pentoxide, tungsten trioxide and ruthenium are loaded on the surface of the carrier, wherein TiO2 accounts for 70-95 wt%, V2O5 accounts for 0-10 wt%, WO3 accounts for 0-20 wt%, and Ru accounts for 0.1-0.8 wt%. The chemical composition precursors of V2O5, WO3 and Ru are ammonium metavanadate, ammonium tungstate and ruthenium trichloride respectively. By loading trace precious metal elements, the denitration catalyst can maintain the efficiency of 90% or above at 150-400 DEG C, and the toxic action of sulfates formed by Sox in the sulfur-containing smoke atmosphere on the catalyst can be relieved. The service life of the catalyst can be prolonged, the preparing method is easy and convenient to implement, and the production efficiency is high.

Description

technical field [0001] The invention relates to the field of low-temperature denitration catalysts, in particular to a preparation method of a low-temperature sulfur-resistant vanadium-titanium series denitration catalyst. Background technique [0002] Nitrogen oxide is one of the main sources of air pollution, and it is also a major factor that directly leads to smog, ozone destruction, and air pollution in various parts of our country. The Selective Catalytic Reduction (SCR) technology using ammonia as the reducing agent is the most mature and efficient technology in flue gas denitrification technology. [0003] The denitrification catalyst is the core of this technology, and its performance is the main factor that determines the denitrification effect and economy of the whole system. At present, most of the denitrification catalysts on the domestic and foreign markets have a working temperature of 290-400°C, and are medium-temperature catalysts. The treatment of low-temp...

AI Technical Summary

Problems solved by technology

At present, most of the denitrification catalysts on the domestic and foreign markets work at a temperature of 290-400°C, which are medium-temperature catalysts. The treatment of low-temperature flue gas from some industrial boilers requires complex heat exchanger systems.

Under low temperature flue gas conditions, SO in flue gas x It will form sulfates to poison the catalyst, accelerate the deactivation of the catalyst, and shorten the service life of the catalyst

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