Carbon-based photocatalytic oxidation denitration catalyst and preparation method thereof

Abstract

The invention discloses a carbon-based photocatalytic oxidation denitration catalyst which is characterized in that the catalyst comprise the following ingredients in parts by weight: 89-99 parts of carbon-based material, 1-11 parts of titanium dioxide, 0.1-1.1 parts of upconversion luminescent material containing rare earth ions, and 0.11-1.1 parts of partial reduction oxidized graphene. The catalyst has the advantages that a visible light response range of titanium dioxide is widened by taking activated semicoke that is wide in source, low in price and easy to regenerate as the carbon-based material, combining the characteristic that a photocatalytic technology takes H2O as a reactor and employing a property that the upconversion luminescent material containing the rare earth ions emit ultraviolet light when excitated by visible light, and composition of TiO2 photoproduction electrons and holes is improved by combining the characteristics that the sheeted partial reduction oxidized graphene can capture the electrons and has high transmission performance. The catalyst can be widely used for photocatalytic oxidation denitration of smoke in a coal-fired power plant, a coal fired boiler, a coal fired kiln, and the like.

Description

technical field [0001] The invention relates to a catalyst for photocatalytic oxidation denitrification of flue gas such as coal-fired power plants, coal-fired boilers and coal-fired kilns, and a preparation method thereof, more specifically, a carbon-based photocatalytic oxidation removal NO catalyst and its preparation method. Background technique [0002] Coal combustion flue gas contains a large amount of air pollutants, mainly SO 2 , NO x . Among them, NO x Not only will it cause damage to the human body, plants, especially crops and economic crops, but it can also form acid rain, optical smog, and destroy the ozone layer. If measures are not taken quickly, it will have a huge impact on the ecological environment and the national economy. The 2000 China Environmental Bulletin reported that among the 338 cities included in the statistics, 63.5% of the cities exceeded the national air quality second-level standard, and 112 cities exceeded the third-level standard, ac...

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Problems solved by technology

However, the traditional SCR still has the following disadvantages: (1) The catalyst is prone to poisoning due to dust wear and alkali / alkaline earth metal corrosion for a long time; (2) The high reaction temperature of the catalyst needs to be preheated between the economizer and the air preheater. Leave a large space for the layout of the catalytic device; (3) The traditional SCR catalytic method has inevitable heat loss, resulting in energy waste; (4) Due to the consumption of NH by SCR technology 3 , the storage, leakage, transportation and other problems of liquid ammonia cause high operating costs and large investment in equipment.

However, since the band gap of titanium dioxide is only 3.2eV, its spectral absorption range is narrow

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