Photo-Fenton desulfurization-denitration catalyst and preparation method thereof

A desulfurization, denitrification and catalyst technology, which is applied in the field of flue gas purification, can solve the problems of high investment and operation costs, low commercial value, and large floor area, and achieve the effects of improving desulfurization and denitrification performance, increasing utilization rate, and improving photocatalytic efficiency

Active Publication Date: 2020-02-11
OCEAN UNIV OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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 prob...

Method used

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  • Photo-Fenton desulfurization-denitration catalyst and preparation method thereof
  • Photo-Fenton desulfurization-denitration catalyst and preparation method thereof
  • Photo-Fenton desulfurization-denitration catalyst and preparation method thereof

Examples

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Effect test

Embodiment 1

[0075] (1) Wash 70 g of ceramic foam three times with deionized water, and dry at 100 °C for later use.

[0076] (2) Add 1g of melamine into 30ml of ethylene glycol solvent, stir at 60°C until the melamine is completely dissolved, add 0.05g of manganese nitrate and 60ml of 0.15mol / L dilute nitric acid solution after the solution is cooled, and wash the resulting precipitate with ethanol, Suction filtration, drying at 60°C, calcination at 520°C for 2h (heating rate 10°C / min), the obtained sample is tubular Mn-g-C 3 N 4 , which looks like figure 1 shown. from figure 1 As can be seen in the tubular Mn-g-C 3 N 4 It has an ultra-high aspect ratio, and the overall shape is complete, the surface is smooth, and the thickness is uniform. Compared with the flake g-C obtained by ordinary thermal condensation polymerization 3 N 4 , the specific surface area has been greatly improved, which increases the number of surface active sites, which is conducive to improving the efficiency ...

Embodiment 2

[0090] (1) Wash 70 g of ceramic foam three times with deionized water, and dry at 100 °C for later use.

[0091] (2) Add 1g of melamine into 30ml of ethanol solvent, stir at 60°C until the melamine is completely dissolved, add 0.05g of manganese chloride and 60ml of 0.15 mol / L dilute nitric acid solution after the solution is cooled, wash the resulting precipitate with ethanol, pump Filter, dry at 60°C, and roast at 520°C for 2h (heating rate: 10°C / min).

[0092] (3) Weigh 0.22 g of ammonium molybdate tetrahydrate and dissolve it in 30 ml of deionized water, weigh 0.34 g of ferric nitrate nonahydrate and dissolve it in 30 ml of deionized water, and add the ferric nitrate solution dropwise to the ammonium molybdate solution under stirring After the dropwise addition, the pH was adjusted to 5 with ammonia water to generate the iron molybdate precursor.

[0093] (4) The tubular Mn-g-C 3 N 4 Add it to the ferric molybdate precursor, stir for 3 hours, transfer it to a 100 ml hyd...

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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...

Claims

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Application Information

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IPC IPC(8): B01J27/24B01J23/881B01D53/75B01D53/86B01D53/76B01D53/60
CPCB01J27/24B01J23/881B01J23/002B01J35/004B01D53/75B01D53/007B01D53/8637B01D53/76B01D2258/0283B01D2251/104Y02A50/20
Inventor 李春虎张程真李浩智郑锐冯丽娟王亮王文泰
Owner OCEAN UNIV OF CHINA
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