Ce-Mn-based solid solution catalyst and preparation method and application thereof

Abstract

The invention relates to the technical field of solid solution catalysts, in particular to a Ce-Mn-based solid solution catalyst and a preparation method and application thereof. The preparation method of the Ce-Mn-based solid solution catalyst provided by the invention comprises the following steps: mixing a mixed solution of soluble cerium salt and potassium permanganate with soluble manganese salt, adjusting the pH value to be greater than 7, sequentially performing oxidation-reduction reaction and aging, and calcining the obtained solid to obtain the Ce-Mn-based solid solution catalyst, wherein the calcination temperature is 400-600 DEG C, and the calcination time is less than 8 hours. The preparation method is simple and low in cost, and the prepared solid solution catalyst has good catalytic activity and catalytic stability and is suitable for large-scale industrial application.

Description

technical field [0001] The invention relates to the technical field of solid solution catalysts, in particular to a Ce-Mn-based solid solution catalyst and a preparation method and application thereof. Background technique [0002] Volatile organic compounds (VOCs) are a class of pollutants with a wide range of sources, which are extremely harmful to humans and the environment. The use of cost-effective routes to degrade VOCs holds great promise. At present, thermal catalytic oxidative degradation of VOCs is a common terminal treatment technology. The technical process is simple, does not produce secondary pollution, and is regarded as an environmentally friendly treatment method at home and abroad. However, the development of catalysts with high activity, high stability and low cost has always been an obstacle to large-scale industrial application in this field. [0003] Domestic and foreign scholars' research on catalyst degradation of VOCs mostly focuses on high-cost p...

AI Technical Summary

Problems solved by technology

For example, the Chinese patent with the publication number CN109893998A discloses a method for preparing a non-precious metal catalyst for degrading toluene by hydrothermal synthesis. The method uses cerium nitrate, potassium permanganate and diatomite as raw materials, although the cost is low , the preparation process is simple, but the catalyst requires a higher temperature (T 100％ =340°C), consumes a lot of energy, and is unfavorable for continuous large-scale application; the Chinese patent with the publication number CN109985520A discloses a porous material (CuO / CuFe 2 o 4 ), the material has higher catalytic activity to toluene

However, the preparation of the porous material is a template method, which leads to an increase in the cost of catalyst preparation, and the removal of the template agent also complicates the catalyst preparation process. Therefore, this method is not suitable for industrial applications; the Chinese patent publication No. CN108295866A A composite metal oxide CoMn formed from the transition metals cobalt and manganese 2 o 4 , the catalyst has good repeatability, and the spinel structure has the advantages of low cost and high thermal stability, but the applicable space velocity of the catalyst is small (30-100mL / min), which is not conducive to large-scale industrial application

Images