Rare-earth-base denitrification catalyst powder and preparation method thereof

Abstract

The invention discloses a rare-earth-base denitrification catalyst powder and a preparation method thereof. The preparation method comprises the following steps: respectively preparing a metatitanic acid slurry, an ammonium paratungstate solution and a cerous nitrate-lanthanum nitrate mixed solution; transferring the ammonium paratungstate solution into the metatitanic acid slurry to obtain an intermediate mixed solution; transferring the cerous nitrate-lanthanum nitrate mixed solution into the intermediate mixed solution to obtain a metatitanic acid-ammonium paratungstate-cerous nitrate-lanthanum nitrate mixed slurry; regulating the pH value of the solution to the set range to obtain a mixed solution containing titanium, tungsten, cerium and lanthanum; drying; calcining; and grinding to obtain the catalyst powder. The invention aims to provide a rare-earth-base denitrification catalyst powder and a preparation method thereof. The rare-earth-base denitrification catalyst powder is nontoxic and harmless to the human and environment, and has the advantages of high-temperature aging resistance, long service life, wide temperature range and controllable product composition; and the preparation method has the advantages of simple facility request and simple operational process, and can easily implement large-scale industrial production.

Description

technical field [0001] The invention belongs to the field of environmental protection, in particular to a rare earth-based denitration catalyst powder and a preparation method thereof. Background technique [0002] Nitrogen oxides (NOX) are usually produced during fuel combustion in thermal power plants and industrial furnaces and exhaust emissions from motor vehicles. Nitrogen oxides are one of the main causes of acid rain and acid fog. Therefore, the emission reduction of nitrogen oxides has always been the focus of attention of all countries. In recent years, my country has paid more and more attention to the reduction of nitrogen oxides. The domestic power industry has included the reduction of nitrogen oxides in the industry development plan. On December 2, 2015, the executive meeting of the State Council decided to implement ultra-low emissions in coal-fired power plants across the country. In order to implement the spirit of the meeting, the Ministry of Environmental ...

AI Technical Summary

Problems solved by technology

Although TiO 2 As a carrier, WO3 as a co-catalyst, V 2 o 5 TiO as active component 2 -WO 3 / V 2 o 5 system, which shows better denitrification efficiency and selectivity, and is widely used, but the catalyst of this system contains V 2 o 5 , V 2 o 5 It is a toxic oxide, slightly soluble in water, causing harm to the environment and personal safety and health

In addition, titanium dioxide is generally used as the titanium source directly in the manufacturing process, so that the catalytically active substances are evenly distributed on the inner and outer surfaces of TiO2. The manufacturing process is more complicated, and the equipment requirements are also higher.