Preparation method for solid catalyst for ozone heterogeneous oxidization

Abstract

The invention relates to a preparation method for a solid catalyst for ozone heterogeneous oxidization and belongs to the technical fields of environmental protection and chemical engineering catalysis. The preparation method comprises the following steps: by taking an activated carbon, carnallite, illite, ulexite, coal ash and gangue porous mineral material as a carrier, modifying the carrier by broaching with lithium hypochlorite and bis(acetylacetone) beryllium, and then adding a surfactant dimethyl hexadecyl ethyl sulfate and performing surface activating treatment under the effect of ultrasonic wave; performing a hydrothermal reaction on an ultrasonic surface activated carrier, a compound mineralizer including borax and potassium sulphate, catalytic activated auxiliaries, including samarium 2,4-pentanedionate hydrate, tri(2,2,6,6-tetramethyl-3,5-hydrochelidonic acid) gadolinium, terbium acetate hydrate and holmium oxalate hydrate rare-earth metal organic compound and catalytic active core components of transition metal, including cobalt gluconate, L-aspartic acid molybdenum complex, gold potassium chloride and iridium tetrachloride in a hydrothermal reaction kettle under the effect of ammonium dimethylamine dimethylaminyl ethanolate chloroacetate used as an emulsifier; drying and dewatering the reaction product; and burning in a muffle furnace under a certain temperature, thereby acquiring the solid catalyst for ozone heterogeneous oxidization.

Description

technical field [0001] The invention relates to a preparation method of an ozone heterogeneous oxidation solid catalyst, belonging to the technical field of environmental protection and chemical catalysts. Background technique [0002] Ozone oxidation technology utilizes the characteristics of strong ozone oxidation ability, which can oxidize and decompose many organic pollutants, and is widely used in wastewater treatment. Ozone catalytic oxidation technology is divided into ozone homogeneous catalytic oxidation and ozone heterogeneous catalytic oxidation. Ozone homogeneous catalytic oxidation has catalysts that are difficult to separate, recycle and reuse. Low ozone utilization leads to high operating costs for water treatment. At the same time, organic pollutants are removed. The low rate and easy to cause secondary pollution of water body limit its application; the ozone heterogeneous catalytic oxidation technology has the advantages of easy separation, recovery and reus...

AI Technical Summary

Problems solved by technology

Due to the wide variety of pollutants and the complex chemical composition of wastewater, it will have adverse effects on the performance of the catalyst, such as adsorption and anti-toxicity, and the catalyst will easily lose its catalytic activity.

At present, the main problems of the preparation method of ozone heterogeneous oxidation solid catalyst are small adsorption capacity, low adsorption selectivity, poor toxicity resistance of the catalyst, and easy loss of catalytic activity; development and use of multi-component porous carriers to increase the adsorption of the catalyst Capacity, enhanced adsorption selectivity, using rare earth metals, transition metals and noble metals to form multi-metal catalytic active centers to improve catalyst anti-toxicity and catalytic activity The preparation method of ozone heterogeneous oxidation solid catalyst has greater environmental benefits and higher Practical value