High-temperature iron-based zeolite molecular sieve honeycomb type denitration catalyst and preparation method thereof

Abstract

The invention relates to a high-temperature iron-based zeolite molecular sieve honeycomb type denitration catalyst and a preparation method thereof, and belongs to the technical field of atmospheric pollution treatment technologies and environmentally friendly catalyzing materials. The preparation method comprises the following steps: mixing ferrous salts with ferrite; synthesizing a zeolite molecular sieve, natural zeolite molecular sieve powder, attapulgite clay or kaolin, glass fibers, an organic binding agent, wood pulp or sesbania cannabina powder, stearic acid and glycerinum; and carrying out mixing, ageing, extrusion forming, drying and roasting to obtain the iron-based zeolite molecular sieve honeycomb type denitration catalyst. According to the catalyst, the zeolite molecular sieve and natural raw mineral materials which have excellent thermal stability are used as carriers, and the running stability, the sintering resistance and the mechanical strength of the catalyst in a high-temperature environment are improved. The obtained honeycomb type denitration catalyst has good water resistance and sulfur poisoning resistance, and the conversion ratio of oxynitride is greater than 90% under the conditions that the temperature is in the high-temperature range of 400-600 DEG C and the air speed is 10,000 h<-1>.

Description

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AI Technical Summary

Benefits of technology

This patented technology allows for better control over the addition of various chemical agents during synthesis compared to previous methods like adding different types of reagents separately beforehand. It also extends the shelf life of these materials due to their stable structure even after being mixed together. Overall, this new method provides an efficient way to produce highly effective NOx reduction catalyzer (NO_{2/N) without requiring expensive equipment such as Vanadium Titanum Transistor).}

Problems solved by technology

Technical Problem addressed in this patented text relates to improving the properties of NOX removal catalysis systems without causing damage caused by harmful gases like mercurialdecyttrium(V2) hexaferrite). Current commercially available catalyst carriers suffer severe degradations when exposed to these harsh environments during manufacturing processes. To solve this problem, research efforts were focused towards developing new types of catalysitive materials containing no transition elements called manganes, tantalites, bismuth compounds, and silicon oxynthanozirconiums.