Photo-Fenton desulfurization-denitration catalyst and preparation method thereof

Abstract

The invention discloses a photo-Fenton desulfurization-denitration catalyst and a preparation method thereof. The photo-Fenton desulfurization-denitration catalyst includes a catalyst carrier and photo-Fenton active components which are loaded on the catalyst carrier through a binder, wherein the photo-Fenton active components include tubular manganese-doped graphite phase carbon nitride and ferric molybdate which is loaded on the tubular manganese-doped graphite phase carbon nitride; and the catalyst comprises, in parts by weight, 70-85 parts of the catalyst carrier, 10-30 parts of the binder, 0.5-2.0 parts of the tubular manganese-doped graphite phase carbon nitride and 0.5-2.0 parts of ferric molybdate. The constructed tubular Mn-g-C3N4 / Fe2(MoO4)3 has three functions of photocatalysis,ozone catalysis and Fenton catalysis, different catalytic systems can depend on each other, and can be promoted by each other, the content of reactive free radicals is increased, and the desulfurization and denitration efficiency of vacuum ultraviolet light catalysis in cooperation with a H2O2 oxidation absorption system is improved. The catalyst can be widely applied to purification treatment offlue gas, ultra-low emission of SO2 and NOx can be achieved, and the catalyst has the characteristics of low cost, simple synthesis, environmental protection and the like.

Description

technical field [0001] The invention relates to a photocatalyst and a preparation method thereof, in particular to a vacuum ultraviolet photocatalytic synergistic H 2 o 2 The invention discloses a photo-Fenton catalyst for oxidative absorption, desulfurization and denitrification and a preparation method thereof, belonging to the field of flue gas purification. Background technique [0002] SO emissions from coal combustion in industrial boilers 2 and NOx are the main causes of acid rain and photochemical smog, which seriously threaten the ecological environment and human health. In 2016, the Ministry of Environment, the National Development and Reform Commission, and the National Energy Administration jointly issued the "Comprehensive Implementation of the Ultra-low Emission and Energy-Saving Retrofit Work Plan for Coal-fired Power Plants", which brought forward the task of ultra-low emission retrofit originally planned to be completed by 2020 in the eastern region to 201...

AI Technical Summary

Problems solved by technology

[0003] At present, my country mainly adopts wet desulfurization (WFGD) combined with selective catalytic reduction (SCR) or non-selective catalytic reduction (SNCR) for denitrification. This combination method can achieve a high pollutant removal rate. Series desulfurization and denitrification systems often have problems such as complex systems, large footprints, and high investment and operation costs.

[0004] Although wet desulfurization has been widely recognized by the market, there are still prominent problems: one is high water consumption; Serious problems of corrosion and fouling

[0007] g-C 3 N 4 It is a non-metal organic semiconductor material with a layered structure similar to graphite, relatively stable physical and chemical properties, simple preparation, and cheap raw materials; but there are also disadvantages such as small specific surface area and high electron-hole recombination rate.

Heterogeneous Fenton-like Catalyst Fe 2 (MoO 4 ) 3 , has the advantages of multiple active sites, low zero-point charge, solid acid properties and a wide range of pH, but its catalytic efficiency is low when used alone

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