Mixed rare-earth denitration catalyst and preparation method thereof

Abstract

The invention relates to a mixed rare-earth denitration catalyst and a preparation method thereof. An active component of the denitration catalyst is a double-active component composed of mixed rare-earth oxide and transition element oxide. The catalyst has the advantages of high catalytic efficiency, wide reaction temperature window and the like due to the synergistic effect between the mixed rare-earth oxide and between the rare-earth oxide and the transition element oxide. A preparation technology adopts an immersion method to manufacture and has the advantage of simple technology, wide raw material sources, low cost and the like. The mixed rare-earth oxide catalyst provided by the invention is mainly applied to the aspect of purifying industrial waste gas, and is especially used for the aspect of flue gas denitration. The mixed rare-earth denitration catalyst can be used for middle-temperature and low-temperature flue gas denitration of coal-fired power plants and can also be used for the field of low-temperature flue gas denitration of an industrial source.

Description

technical field [0001] The invention relates to the field of waste gas treatment and purification, in particular to a mixed rare earth denitrification catalyst and a preparation method thereof. Background technique [0002] Rare earth elements exhibit unique chemical properties due to their unfilled 4f orbitals and lanthanide contractions. As catalysts, they have been widely used in many important chemical processes, such as petrochemicals, catalytic combustion of fossil fuels, carbon 1. Chemical industry, environmental catalysis, purification of motor vehicle exhaust and purification of toxic and harmful gases, etc. Since the mid-1960s, extensive research has been conducted on the properties of rare earth compounds at home and abroad, including the study of rare earth alternatives to precious metals that are relatively scarce; the use of rare earths to improve or prepare new catalytic materials with better performance and more environmental protection; To study the mechani...

AI Technical Summary

Problems solved by technology

[0003] Although rare earth oxides show certain catalytic activity for certain chemical reactions, and their catalytic activity can be improved by reducing their particle size, increasing their specific surface area, or modifying their surface crystal plane composition through nano-preparation, they are still much lower than The ideal state required for the reaction, and the thermal stability of rare earth oxides is not satisfactory, and it is easy to sinter at high temperature, resulting in a decrease in catalytic activity