Low-temperature denitrification catalyst and preparation method thereof

A low-temperature denitration and catalyst technology, applied in chemical instruments and methods, physical/chemical process catalysts, separation methods, etc., can solve problems such as the inability to meet the denitration requirements of non-electrical industries, improve low-temperature denitration activity, and enhance anti-sulfur poisoning ability. , the effect of broad application prospects

Active Publication Date: 2022-05-17
SHANDONG GEMSKY ENVIRONMENTAL PROTECTION TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the optimum operating temperature range of vanadium-titanium catalyst is 310-410°C, which cannot meet the denitrification requirements of non-electric industries.

Method used

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  • Low-temperature denitrification catalyst and preparation method thereof
  • Low-temperature denitrification catalyst and preparation method thereof
  • Low-temperature denitrification catalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Accurately weigh quantitative sodium chloride and hydrochloric acid according to the halogen salt / halogen acid molar ratio of 0.5, and prepare a polarizing solution with a halogen ion molar concentration of 0.5mol / L and a mass of 1000g, and place the polarizing solution in a polytetrafluoroethylene container Accurately weigh quantitative cerium nitrate according to the metal / halogen ion molar ratio of 0.5, put it into a polytetrafluoroethylene container equipped with polarizing solution, seal the container after fully dissolving and heat it to 180°C for 24 hours and then drop to room temperature. Then filter and wash to obtain the cerium oxychloride precursor; Accurately weigh quantitative titanium dioxide according to the mass percentage of active component / carrier 10%, take the carrier mass as a benchmark, add 0.5% stearic acid, 3 % lactic acid and an appropriate amount of deionized water, and mixed for the first time; according to the mass percentage content of 10% of...

Embodiment 2

[0036] Accurately weigh quantitative potassium chloride and hydrochloric acid according to the halogen salt / halogen acid molar ratio of 3, and prepare a polarizing solution with a molar concentration of 0.1mol / L of halogen ions and a mass of 1000g, and place the polarizing solution in a polytetrafluoroethylene container Accurately weigh quantitative ammonium metavanadate according to the metal / halogen ion molar ratio of 0.25, put it into a polytetrafluoroethylene container equipped with polarizing solution, seal the container after fully dissolving and heat it to 120°C for 36 hours and then drop to room temperature, then filter and wash to obtain the vanadium oxychloride precursor; accurately weigh quantitative diatomite according to the mass percentage of the active component / carrier at 5%, and add 1% stearin to the carrier based on the mass of the carrier Acid, 5% lactic acid and an appropriate amount of deionized water are mixed for the first time; according to the mass perc...

Embodiment 3

[0038]Accurately weigh quantitative sodium fluoride and hydrofluoric acid according to the molar ratio of halogen salt / halogen acid 2, and make a polarizing solution with a molar concentration of halogen ions of 2mol / L and a mass of 1000g, and place the polarizing solution in a polytetrafluoroethylene container Medium: Accurately weigh the quantitative copper nitrate according to the metal / halide ion molar ratio of 0.75, put it into the polytetrafluoroethylene container with the polarizing solution, seal the container after fully dissolving and heat it to 210°C for 12 hours, then cool down to room temperature , then filter and wash to obtain the copper oxyfluoride precursor; accurately weigh quantitative alumina powder according to the mass percentage of the active component / carrier of 15%, and add 2% stearic acid to the carrier based on the carrier mass , 4% lactic acid and an appropriate amount of deionized water for the first mixing; according to the mass percentage of the p...

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Abstract

The invention belongs to the technical field of industrial flue gas denitrification, and in particular relates to a low-temperature denitrification catalyst and a preparation method thereof. The low-temperature denitration catalyst is based on one or more of transition metal cerium, vanadium, and copper oxyhalides as active components, and one or more of tungsten, molybdenum, and iron metal oxides are used as auxiliary components. The catalyst is prepared by using one or more of titanium dioxide, diatomaceous earth and alumina as a carrier, through polarization, mixing, extrusion, drying and firing. The catalyst of the invention has the advantages of low-temperature denitrification activity (150-250° C.), resistance to sulfur dioxide and water poisoning, high stability, and high mechanical strength of the catalyst, and is suitable for the treatment of atmospheric pollutants in non-electric industries.

Description

technical field [0001] The invention belongs to the technical field of industrial flue gas denitrification, and in particular relates to a low-temperature denitrification catalyst and a preparation method thereof. Background technique [0002] Nitrogen oxides (NO x ) is the main air pollutant, and the current mainstream technology for removing nitrogen oxides is selective catalytic reduction technology, the core of which is the denitrification catalyst. With the implementation of a series of air pollutant control standards in my country, the proportion of pollution emissions from coal-fired power plants has continued to decrease, and the problem of air pollution in non-electric industries has become more prominent. The control of flue gas in non-electric industries has become an important task of current air pollution control. However, the flue gas temperature in the non-electric industry is low and the composition is complex, and the denitrification catalyst for power plan...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/135B01J27/132B01J27/128B01D53/86B01D53/56
CPCB01J27/135B01J27/132B01J27/128B01D53/8628B01D2258/0283Y02C20/30
Inventor 李慧远伊茂广薛志伟李亮亮王志民张晓威
Owner SHANDONG GEMSKY ENVIRONMENTAL PROTECTION TECH CO LTD
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