Formaldehyde gas oxidation catalyst under room temperature

Abstract

The present invention provides a kind of formaldehyde gas oxidizing catalyst for room temperature use. Metal oxide is first obtained with soluble metal nitrate, carbonate or other inorganic salt and through oxidation and precipitation; and then loaded with small amount of metal to form the catalyst with room temperature formaldehyde oxidizing activity. The catalyst has metal oxide as main body and supported noble metal as active component, and features that the metal oxide may be oxide of Al, Ni, Mn, Si or Fe, and the noble may be Pt, Ru, Au, Rh or Pd. The catalyst of the present invention has high catalytic activity, and long sustaining time. The catalyst has formaldehyde converting rate up to 100 %, and results in low power consumption.

Description

technical field

[0001] The invention is used for oxidizing formaldehyde gas at room temperature, and can oxidize formaldehyde gas into carbon dioxide and water at room temperature. technical background

[0002] Formaldehyde is a typical indoor environmental pollutant. A variety of interior decoration materials, such as furniture paint, wallpaper, plastic floors, chemical fiber carpets, doors and windows, etc., may release formaldehyde into the room. The release of formaldehyde in the environment can last for several years, seriously damaging human health. Studies have shown that long-term exposure to low concentrations of formaldehyde (0.017mg / m 3 ~0.068mg / m 3 ), although the intensity of the symptoms caused is weak, but the symptoms are consistent with the acute effects of formaldehyde.

[0003] At present, various air purifiers mainly use the strong adsorption of activated carbon to adsorb pollutants such as formaldehyde. Commonly used porous carbon materials include ...