Preparation method and regeneration method and application of a catalyst for catalytically activating oxygen to remove volatile organic compounds at room temperature

Abstract

A preparation method and its regeneration method and application of a catalyst for catalytically activating oxygen to remove volatile organic compounds at room temperature, the steps: 1) dissolving metal aluminum powder in saturated potassium permanganate aqueous solution, and controlling the reaction temperature at 10-90°C Between, the weight percentage of metal aluminum and potassium permanganate is controlled between 1-50%; 2) cooling and precipitating in an ultrasonic field to obtain a solid catalyst, or co-precipitating with a polyoxometalate to obtain a solid catalyst. The invention has low raw materials, simple manufacturing process, easy operation, and low preparation cost; the prepared catalyst can use oxygen in the air to degrade benzene and other non-substituent aromatic hydrocarbon volatile organic compounds under environmental conditions, and is safe and non-toxic; The catalytic activity can be regenerated in situ with ozone, which reduces the cost of the catalyst; it can be extruded into other shapes with the porous carrier material, and the catalytic ability will not be affected.

Description

technical field [0001] The invention belongs to the technical field of air purification, and relates to a method for preparing a brand-new catalyst, in particular to a method for preparing a catalyst for catalytically activating oxygen to remove volatile organic compounds at room temperature, a regeneration method and application thereof. Background technique [0002] Volatile organic compounds (VOCs) in the air and refractory organic compounds (POPs) in water can damage human health, especially unsubstituted aromatic hydrocarbons (such as benzene, naphthalene, etc.), many of which are carcinogens . At room temperature, chemical catalysts are used to catalyze and activate oxygen in the air to remove volatile organic compounds in the air and refractory organic compounds in water, including microorganisms, without producing secondary pollutants and low practical energy consumption. The most ideal and cutting-edge technology in the field of water purification, although related...

AI Technical Summary

Problems solved by technology

Most of the catalysts we have successfully invented before, the active oxygen obtained by catalytic activation cannot destroy and degrade unsubstituted aromatic hydrocarbons (such as benzene, naphthalene, etc.)

For example, a bimetallic center catalyst containing noble metals, such as palladium (Pd)-copper (Cu) catalytic system [Patent Publication No. CN106807239A], must be assisted by formaldehyde or the temperature is higher than 100 degrees Celsius to catalyze the activation of oxygen in the air Degradation of volatile organic compound benzene; the palladium (Pd)-gold (Au) catalyst reported in the literature [J Phys Chem C, 2015, volume 119, pages 11754-11762] activated oxygen, at room temperature only has the ability to oxidatively degrade carbon monoxide, olefins and The ability of alcohol; nano-noble metal particles as catalysts [platinum, gold, silver, etc., ACS Catalysis, 2013, volume 3, 478-486 pages] do not have the ability to degrade aromatic hydrocarbons without substituents at room temperature, and nano-metal particles Polymerization deformation leads to rapid deactivation of the catalyst; at the same time, precious metals such as gold and palladium are expensive, resulting in high catalyst costs; catalysts with vanadium (V) as the catalytic center [Catalysis Letter, 2015, Volume 145, pages 1014-1021], due to Vanadium is highly toxic and difficult to use; iron powder sacrificial method is used to activate oxygen [Environ.Eng.Res.2015; Volume 20(3), pp. 205-211], which needs to use more than the molar amount of volatile organic compounds to be degraded Iron powder; biological enzymes and corresponding biomimetic complex catalysts (such as porphyrin complexes, etc.) can degrade unsubstituted aromatic hydrocarbons at room temperature [Drug Metabolism Review, 2002, volume 34, pages 691-708 ; Proc Natl Acad Sci USA, 2016, Volume 113, Page 12035-12040], however, they are easily poisoned and deactivated by many substances, and the reaction of these substances as catalysts is very slow; etc.

Images