Surface deposition-type honeycomb catalyst for flue gas denitrification and preparation method thereof

摘要

This invention relates to the cleaning of flue gas released from various combustion processes, particularly a surface deposition NH3—SCR honeycomb catalyst and its preparation method. The catalyst is composed of framework material, TiO2, V2O5 and WO3, wherein the framework material is composed of clay, coal ash, mineral waste residue or their mixture. The mass fractions for framework material, TiO2, V2O5, and WO3 are 60 wt. % to 80 wt. %, 13 wt. % to 33 wt. %, 1 wt. % to 5 wt. %, and 0.1 wt. % to 2 wt. %, respectively. The nano V2O5—WO3—TiO2 particles were deposited on the surface of particle pore or honeycomb, and the performance of the catalyst could be greatly improved.

主权项

1. A honeycomb catalyst for DeNOx prepared by surface deposition method, being composed of a honeycomb framework, TiO2 as an active carrier, V2O5 and WO3 as the active components, wherein the honeycomb framework is composed of clay, coal ash or mineral waste residue, the active components are loaded on the active carrier and the active carrier is dispersed in the honeycomb framework; mass fractions of the components are as follows: the framework: 63˜80 wt. %; TiO2 : 13˜33 wt. %; WO3 : 1˜5 wt. %; V2O5 : 0.1˜2 wt. %.