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A catalyst for simultaneous denitration, mercury removal and dioxin removal and preparation method thereof

A technology for removing dioxins and catalysts, which is applied in flue gas purification in the field of chemical plants, simultaneous denitrification, mercury and dioxin removal catalysts and its preparation, in the field of coal-fired power plants, to achieve wide activation temperature range, high cost performance, and simple preparation process Effect

Active Publication Date: 2022-08-09
南京环福新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to propose a simultaneous denitrification, mercury, and dioxin removal catalyst with a wide active temperature range in view of the current situation and existing problems of industrial denitrification, mercury, and dioxin removal in existing coal-fired power plants. Another purpose of the invention is to provide a preparation method for the above-mentioned catalyst, which is especially suitable for flue gas purification in coal-fired power plants, chemical plants and other fields

Method used

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  • A catalyst for simultaneous denitration, mercury removal and dioxin removal and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] (1) Preparation of active component precursor solution

[0029] Weigh 21.234g of ceric ammonium nitrate, 6.776g of niobium pentachloride and 42.015g of ascorbic acid, add 56.02g of deionized water, place it in a constant temperature water bath at 80°C and stir for 90min until the solution is clear and transparent and the viscosity reaches 4000cP, to obtain the active component precursor body solution;

[0030] (2) Co-catalyst composite colloidal solution configuration

[0031] Weigh 44.2 mg of chloroplatinic acid hexahydrate and 22.127 g of deionized water and stir to generate a chloroplatinic acid solution, then add 2.213 g of ascorbic acid and carry out stirring reaction at a temperature of 5 ° C until the colloidal solution is clear and transparent, continue to weigh 144.5mg of nickel chloride and 722.5mg of glucose were added to the solution and stirred in a constant temperature water bath at 80°C for 90min until the solution was clear and transparent and the visco...

Embodiment 2

[0040] (1) Preparation of active component precursor solution

[0041] Weigh 59.721g of ceric ammonium nitrate, 22.869g of niobium pentachloride and 123.885g of ascorbic acid, add 165.18g of deionized water and place it in a constant temperature water bath at 80°C and stir for 90min until the solution is clear and transparent and the viscosity reaches 2000cP to obtain the active component precursor body solution;

[0042] (2) Co-catalyst composite colloidal solution configuration

[0043] Weigh 66.3mg of chloroplatinic acid hexahydrate and 33.191g of deionized water and stir to generate a chloroplatinic acid solution, then add 3.319g of ascorbic acid and carry out stirring reaction at a temperature of 5 ℃ until the colloidal solution is clear and transparent, continue to weigh 216.7mg of nickel chloride and 1.084g of glucose were added to the solution and stirred in a constant temperature water bath at 80°C for 90min until the solution was clear and transparent and the viscos...

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Abstract

The invention discloses a catalyst for simultaneous denitration, mercury removal and dioxin removal and a preparation method thereof. Cerium oxide and niobium pentoxide are used as catalytic active components, a mixture of nickel oxide and platinum nanoparticles is used as a co-catalyst, and hydrochloric acid is used to modify the catalyst. The titanium dioxide nanoneedles generated from tetrabutyl titanate were used as the main carrier, and the catalyst was used after hydrogen pretreatment. Based on the quality of the carrier, the mass percentage of the active component is 10% to 30%, and the mass percentage of the cocatalyst is 0.1% to 0.15%. The composite colloidal solution of active components and co-catalyst, and the optimized and modified catalyst carrier are evenly stirred, aged, extruded, dried and calcined. The catalyst is environmentally friendly, capable of high-efficiency denitrification, mercury and dioxin removal at the same time, with a wide active temperature range, SO 2 The oxidation efficiency is low. The denitrification and dioxin removal efficiencies are both greater than 95% at 240-500°C, and the mercury removal efficiencies are both greater than 99%. The product can be widely used in coal-fired power plants, chemical plants and other fields.

Description

technical field [0001] The invention relates to a catalyst for simultaneous denitration, mercury removal and dioxin removal and a preparation method thereof, belonging to the fields of environmental protection catalytic materials and air pollution control. Background technique [0002] Nitrogen oxides are one of the main causes of air pollution such as smog and acid rain. Mercury and dioxins will seriously endanger human health and the ecological environment. With the smooth implementation of the "Air Pollution Prevention and Control Action Plan" and the implementation of strategic plans such as the battle to defend the blue sky, ultra-low emissions of the three pollutants are imperative, and the emission limit of nitrogen oxides shall not be higher than 150mg / m2 3 , the dioxin content shall not be higher than 0.1ng TEQ / m 3 , the content of mercury and its compounds shall not be higher than 0.05mg / m 3 . At present, the composition of flue gas pollutants emitted by industr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/89B01J23/10B01J23/20B01J21/06B01J32/00B01J37/18B01D53/86B01D53/56B01D53/64B01D53/70
CPCB01J23/898B01J23/10B01J23/20B01J21/063B01J37/18B01J23/002B01D53/8628B01D53/8662B01D53/8665B01D2258/0283B01J2523/00B01J2523/3712B01J2523/56B01J2523/847Y02A50/20
Inventor 沈岳松金奇杰
Owner 南京环福新材料科技有限公司
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