Nontoxic rare-earth denitration catalyst and preparation method and application thereof

Abstract

The invention relates to a nontoxic rare-earth denitration catalyst and a preparation method and application thereof. The preparation method includes: adopting rare-earth FCC waste agent in oil refining catalyst and hydrogenation waste agent containing tungsten and molybdenum, smashing and grinding, extruding the rare-earth FCC waste agent and the hydrogenation waste agent with high-aluminum cement and starch for molding, and solidifying to form a cellular blank; using a hydrothermal method for in-situ growing of nano anatase TiO2 to form a composite oxide carrier of a shell layer-blank structure; impregnating active components loaded by rare earth, zirconium and manganese, and calcining and activating. The catalyst has a step hole system with micro holes smaller than 2nm, medium-hole-gap medium holes of 2-5nm and large-hole-gap accumulation holes larger than 5nm, thereby being conducive to diffusion of reactant and resultant in the process of smoke denitration and having high NOx conversion activity within a wide temperature range; V2O5 which is toxic is not used for preparation, so that damage to environment and personnel in each link is avoided, and SO2/SO3 conversion rate is lowered; active component consumption and high-temperature sintering step are reduced, the oil refining agent is recycled, preparation cost is saved, and green preparation friendly to environment is realized.

Description

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AI Technical Summary

Benefits of technology

This patented technology provides a new way for making ceramics containing rare metals (RE) such as lanthanum or yttrium). These materials can be useful because they are effective chemical reactions between gases like nitric acid and oxygen. They provide improved efficiency compared to traditional methods due to their ability to efficiently absorb light from sunlight while minimizing emissions into space through evaporation processes. Additionally, these composites made up of different types of particles help prevent degraded metal parts from rusting out easily even under harsh conditions where water may penetrate them. Overall, this innovative technical solution allows for better control on pollution emission levels associated with combustion engines.

Problems solved by technology

This technical problem addressed in this patents relates to finding methods for producing finely divided nitride carriers containing titanium dioxynaphosphorus cores and multiple layers of nickel sulfone impregnant carrying noble metals like molten salts or tantalum particles. These techniques aim at create small particle sizes within certain dimensions while maintaining sufficient contact between the Ni2+ ion source and dinitiation sites during decomposition reactions. Additionally, they should avoid contaminants produced when combusted heavy residues.

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