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Catalyst for simultaneous denitration, demercuration and dioxin removal and preparation method thereof

A technology for removing dioxins and catalysts, which is applied in the fields of flue gas purification in chemical plants, coal-fired power plants, simultaneous denitration, mercury, and dioxin removal catalysts and its preparation, to achieve simple preparation process, excellent resistance to sulfur poisoning, and environmental protection friendly effect

Active Publication Date: 2020-05-19
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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  • Catalyst for simultaneous denitration, demercuration and dioxin removal and preparation method thereof
  • Catalyst for simultaneous denitration, demercuration and dioxin removal and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

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

[0029] Weigh 21.234g of cerium ammonium nitrate, 6.776g of niobium pentachloride and 42.015g of ascorbic acid, add 56.02g of deionized water, place 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, and the active component precursor is obtained. body solution;

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

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

Embodiment 2

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

[0041] Weigh 59.721g of cerium ammonium nitrate, 22.869g of niobium pentachloride and 123.885g of ascorbic acid, add 165.18g of deionized water and place 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 colloid solution configuration

[0043] Weigh 66.3mg of chloroplatinic acid hexahydrate and 33.191g of deionized water and stir to form a chloroplatinic acid solution, then add 3.319g of ascorbic acid and stir the reaction at a temperature of 5°C until the colloidal solution is clear and transparent, continue weighing 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 90 minutes until the solution was clear and transparent and the viscosity reached 4...

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Abstract

The invention discloses a catalyst for simultaneous denitration, demercuration and dioxin removal and a preparation method thereof. According to the invention, cerium oxide and niobium pentoxide are used as catalytic active components, a mixture of nickel oxide and platinum nanoparticles is used as a cocatalyst, a titanium dioxide nanoneedle generated by modifying tetrabutyltitanate with hydrochloric acid is used as a main carrier, and the catalyst is used after hydrogen pretreatment. Based on the mass of the carrier, the mass percentage of the active components is 10%-30%, and the mass percentage of the cocatalyst is 0.1%-0.15%. The preparation method comprises the following steps: uniformly stirring the active components, a cocatalyst composite colloidal solution and the optimized and modified catalyst carrier, carrying out aging and extrusion molding, and then performing drying and roasting to obtain the catalyst. The catalyst is environment-friendly, can efficiently remove nitrate,mercury and dioxin at the same time, and has a wide active temperature interval and low SO2 oxidation efficiency. Within 240-500 DEG C, the denitration efficiency and the dioxin removal efficiency ofthe catalyst are both higher than 95%, and the mercury removal efficiency of the catalyst is higher than 99%. The catalyst can be widely applied to the fields of coal-fired power plants, chemical plants and the like.

Description

technical field [0001] The invention relates to a simultaneous denitrification, mercury and dioxin removal catalyst and a preparation method thereof, belonging to the field of environmental protection catalytic materials and air pollution control, and the product prepared by the method is especially suitable for flue gas purification in fields such as coal-fired power plants and chemical plants. Background technique [0002] Nitrogen oxides are one of the main causes of air pollution such as smog and acid rain, while mercury and dioxins can seriously endanger human health and the ecological environment. With the smooth implementation of the "Action Plan for the Prevention and Control of Air Pollution" and the progress of strategic plans such as the Blue Sky Defense War, ultra-low emissions of the three pollutants are imperative, and the emission limit of nitrogen oxides shall not exceed 150mg / m 3 , the dioxin content shall not be higher than 0.1ng TEQ / m 3 , the content of m...

Claims

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Application Information

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Patent Type & Authority Applications(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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