A kind of formaldehyde removal catalyst and preparation method thereof

Abstract

The invention relates to a formaldehyde removal catalyst and a preparation method thereof, wherein the general formula of the formaldehyde removal catalyst is A-Mg / Al 2 o 3 ; Wherein A is one of Pt, Pd, Au, Al 2 o 3 As a carrier, the loading amount of A is Al 2 o 3 0.1~1% of the carrier weight, Mg loading is Al 2 o 3 0.1% to 5% of the weight of the carrier. The catalyst of the present invention includes Mg as an auxiliary agent, and the synergistic effect of Mg is as follows: on the one hand, the addition of an appropriate amount of Mg can improve the dispersion of noble metals through the electrostatic force of anions and cations, and significantly improve the ability to activate oxygen, thereby improving the efficiency of catalytic oxidation of formaldehyde; On the one hand, the addition of an appropriate amount of Mg is beneficial to reduce the Al 2 o 3 The strong acid site of the carrier is conducive to the activation of lattice oxygen, which is beneficial to inhibit and degrade the accumulation of intermediate products, improve the decomposition efficiency and stability, and can adapt to a higher space velocity environment.

Description

technical field [0001] The invention belongs to the technical field of catalytic materials, and in particular relates to a formaldehyde-removing catalyst and a preparation method thereof. Background technique [0002] Formaldehyde is the main indoor air pollutant, which has serious harm to the human body. The main harm of formaldehyde is the irritation to the skin and mucous membranes. When formaldehyde reaches a certain concentration indoors, people will feel uncomfortable, more than 0.08mg / m 3 High formaldehyde concentration can cause eye redness, itching, throat discomfort or pain, hoarseness, sneezing, chest tightness, asthma, dermatitis, etc. At present, one of the more feasible methods for the removal of indoor formaldehyde pollutants is to oxidize formaldehyde and CO to CO through room temperature catalytic oxidation. 2 , thereby removing contaminants. [0003] The room temperature catalytic oxidation of formaldehyde decomposition mechanism is that formaldehyde is ...

AI Technical Summary

Problems solved by technology

This patent is the first to prepare MnO modified by alkali metal or rare earth metal 2 carrier, and then Pt is loaded on the carrier to catalyze the degradation of formaldehyde; the preparation process of this two-step method is complicated, which is not conducive to saving costs, and the test space velocity is still small, which is difficult to meet the actual indoor rapid purification of formaldehyde requirements