Preparation method of noble metal-loaded activated carbon fiber monoatomic catalyst for catalytic degradation of VOCs at room temperature

Abstract

The invention discloses a preparation method of a noble metal-loaded activated carbon fiber monoatomic catalyst for catalytic degradation of VOCs at room temperature. The method includes the steps of:(a) pretreatment of a carrier: immersing activated carbon fiber in a sulfuric acid solution, performing ultrasonic treatment, then subjecting the ultrasound treated solution to heating reaction in awater bath pot, then performing cleaning with distilled water to neutral, and conducting natural airing to obtain modified activated carbon fiber; (b) noble metal loading: impregnating the modified activated carbon fiber in a noble metal solution, and performing ultrasonic treatment and standing, then adding a sodium hydride solution to reduce noble metal, finally taking out the activated carbon fiber, and conducting washing and drying to obtain a noble metal-loaded activated carbon fiber semi-finished product; and (c) calcination: putting the noble metal-loaded activated carbon fiber semi-finished product in a muffle furnace for calcination, thus obtaining the noble metal-loaded activated carbon fiber monoatomic catalyst finally. The method provided by the invention greatly improves the catalytic degradation efficiency of the monoatomic catalyst.

Description

technical field [0001] The invention relates to a method for preparing a catalyst, in particular to a method for preparing a catalyst for catalytically degrading volatile organic pollutants at room temperature. Background technique [0002] Volatile organic compounds (Volatile Organic Compounds, VOCs) are one of the main pollutants of air pollution due to their large emissions and high toxicity. According to the definition of the World Health Organization (WHO), volatile organic compounds refer to a class of organic compounds with a boiling point between 50 and 260 ° C, a saturated vapor pressure exceeding 133.32 Pa at room temperature, and existing in the air in the form of gases at room temperature. There are many types of VOCs, mainly including volatile pollutants such as hydrocarbons, aldehydes, and ketones. VOCs mainly come from petrochemical industry, steel manufacturing, pharmaceutical industry, printing industry and painting industry, etc. A variety of volatile org...

AI Technical Summary

Problems solved by technology

At present, the regenerative catalytic combustion technology is widely used for the degradation of VOCs. The regenerative catalytic combustion method can achieve a better removal rate, but it often requires high temperature (generally above 300 ° C), high energy consumption, and easy to produce by-products , so the reduction of the catalytic combustion reaction temperature has a great advantage in the catalytic degradation of VOCs

[0003] The patent with the publication number CN 105013508 A discloses a catalyst and preparation method for low-temperature catalytic combustion of chlorinated volatile organic compounds. The catalyst uses γ-Al2O3 particles as the carrier and NM-RMO-Co3O4 as the active component; Wherein, RMO-Co3O4 accounts for 5% to 15% of the weight of the catalyst, NM accounts for 0.01% to 0.2% of the weight of the catalyst, and the balance is γ-Al2O3 particles; the RMO is rare earth metal oxides CeO2, ZrO2, La2O3, Nd2O3, Y2O3 One or more of them, NM is one or more of the noble metals Pd, Pt, Ru, Rh, but its experimental temperature is 200 ° C ~ 250 ° C, the temperature is relatively high, catalytic degradation into high

Images