A kind of preparation method of the catalyst that is used for vocs catalytic oxidation

Abstract

The invention discloses a preparation method of catalyst for VOCs catalytic oxidation, which includes steps of (1), dissolving NaOH solid and 3-mercaptopropyltrimethylsilane in the deionized water; evenly stirring to obtain first ligand solution; (2), dissolving the chloroauric acid solid containing crystalized water in the water, and preparing to be chloroauric acid solution; dropwise adding hydrochloric acid; then stirring and mixing the prepared chloroauric acid solution with the first ligand solution to obtain second ligand solution; (3), mixing gel silica and the second ligand solution toobtain third ligand solution; (4), adding NaAlO2 in the third ligand solution, filtering, drying and roasting to obtain the catalyst. The catalyst prepared by the method is good in anti-aging performance and phase change resistance.

Description

technical field [0001] The invention relates to a preparation method of a catalyst, in particular to a preparation method of a catalyst used for catalytic oxidation of VOCs. Background technique [0002] According to the definition of the World Health Organization (WHO), volatile organic compounds (VOCs, Volatile Organic Compounds) are a class of organic compounds with a boiling point between 50 and 250 °C. The saturated vapor pressure at room temperature exceeds 133.32 Pa, and they exist in the form of vapor at room temperature. A class of organic compounds in the air. [0003] VOCs come from a wide range of sources, mainly divided into industrial sources and domestic sources. Industrial sources mainly include VOCs production industries such as petroleum refining and petrochemicals, coal processing and transformation, production of basic chemical raw materials, production processes that use VOCs as raw materials such as paint, ink, and synthetic material production, as wel...

AI Technical Summary

Problems solved by technology

These catalyst materials have their own advantages and disadvantages. For example, noble metals have very high catalytic oxidation activity for VOCs, and VOCs can be completely converted at lower temperatures, but noble metals are expensive and easily react with hydrogen chloride and hydrogen sulfide to form metal chlorides and metal sulfides. , causing it to be easily poisoned and deactivated, thereby reducing the service life of the catalyst; although transition metal oxides are abundant in reserves and low in price, they require a higher light-off temperature, and their catalytic activity is not as good as that of noble metal catalysts; It has good catalytic activity and low price, but its stability is poor and it is easy to deposit carbon

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