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Catalyst, catalyst system and method used in ammonia-process integrated desulfurization and denitrification

A technology of ammonia desulfurization and catalyst, applied in the integrated field of ammonia desulfurization and denitrification, can solve the problems of high catalyst cost, waste of oxidant, large amount of chlorine, etc., achieve stable catalytic performance, avoid secondary pollution, and high absorption efficiency

Inactive Publication Date: 2015-12-09
MAISEN ENERGY TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

A disclosed flue gas desulfurization and denitrification process and device using liquid-phase oxidation multi-stage absorption. It is necessary to pre-desulfurize the flue gas, then perform liquid-phase oxidation on it, and then absorb sulfur dioxide in the flue gas through the desulfurization slurry , Nitrogen dioxide, but the invention patent uses chlorite as the oxidant, which is prone to self-hydrolysis and produces a large amount of chlorine gas, resulting in a waste of oxidant
A disclosed catalyst for simultaneous desulfurization and denitrification of praseodymium oxide supported on activated carbon, but the catalyst has an action temperature of 300-500°C, high energy consumption, and the reduction of NO to N 2 , the resource utilization of NO can not be carried out, and the cost of the catalyst is relatively high

Method used

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  • Catalyst, catalyst system and method used in ammonia-process integrated desulfurization and denitrification
  • Catalyst, catalyst system and method used in ammonia-process integrated desulfurization and denitrification
  • Catalyst, catalyst system and method used in ammonia-process integrated desulfurization and denitrification

Examples

Experimental program
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Embodiment 1

[0023] This example relates to a group of catalysts for the integration of ammonia desulfurization and denitrification, the components of which are shown in the following table:

[0024]

[0025] The above-mentioned pyridine or imidazole ionic liquid catalysts are taken as an example in Example 1.1, and the following preparation method is adopted:

[0026] Pyridine and hexadecyl bromide react with a molar ratio of 1:2 to generate a bromide ionic liquid, then react the generated ionic liquid with sodium nitrate in an acetonitrile solvent with a molar ratio of 1:1, filter out the precipitate, and At a temperature of 85°C, the acetonitrile solvent was removed by rotary evaporation to obtain the 1-hexadecylpyridinium nitrate ionic liquid.

Embodiment 2

[0028] This example relates to a group of catalyst systems used for the integration of ammonia desulfurization and denitrification, and its component distribution ratio is shown in the following table:

[0029]

[0030] Above-mentioned catalyst system adopts following preparation method:

[0031] Weigh a certain amount of catalyst, and under the condition of stirring, dissolve the catalyst in the water-insoluble organosilicon according to the percentage ratio in the above table to prepare the catalyst system.

Embodiment 3

[0033] This embodiment relates to an integrated method for ammonia desulfurization and denitrification.

[0034] The integrated method of ammonia desulfurization and denitrification in this embodiment adopts such as figure 1 Shown reaction device, this device comprises bubble tower 4, and bubble tower 4 is used as the reaction chamber of ammonia method desulfurization and denitrification integration, and the bottom of bubble tower 4 is connected with ammonia water storage tank 1, flue gas pipe F1, oxygen pipe respectively. F2 is connected, and an oil-water separator 2 is connected to the side of the bubble column 4. The catalyst system and salt solution mixture extracted during the reaction are separated in the oil-water separator 2, and the obtained upper layer catalyst system is returned to the drum through the circulation pump 3. In the bubble tower 4, the lower salt solution is removed through the salt solution removal pipe F4 for processing, and the tail gas discharge pip...

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Abstract

The invention relates to a catalyst used in ammonia-process integrated desulfurization and denitrification. The catalyst is a pyridine- or imidazole-type ionic liquid, which is easy and convenient to prepare. A catalyst system composed of the ionic liquid catalyst and non-water-soluble organic silicon is high in catalytic speed, is stable in catalytic performance and can be recycled, and has excellent industrial application prospect. The ammonia-process integrated desulfurization and denitrification method can quickly absorb and oxidize SO2 and NOx in flue gas to generate a salt solution containing ammonium sulfate and ammonium nitrate, thereby recycling the SO2 and the NOx to obtain resources. The catalyst system is less in use amount and can be recycled. The catalyst system is high in absorption efficiency on SO2 and NOx, is low in energy consumption and operation cost, and is green and environment-friendly.

Description

technical field [0001] The invention relates to a catalyst for a desulfurization and denitrification method, in particular to a catalyst and a catalyst system for the integration of ammonia desulfurization and denitrification, and at the same time, the invention also relates to an integrated method of ammonia desulfurization and denitrification using the catalyst system. Background technique [0002] With the acceleration of my country's industrial pace, air pollution is also becoming more and more serious. In my country, about 84% of coal is directly burned, producing a large amount of SO 2 , NO X Gas, which brings great harm to human beings and the environment. With the continuous improvement of the country's environmental requirements, SO 2 , NO X The control and purification of gas has become an urgent task at present. [0003] At present, the integrated desulfurization and denitrification technology widely used at home and abroad is mainly a combination of wet flue g...

Claims

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Application Information

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IPC IPC(8): B01J31/02B01J21/06B01J35/12B01D53/90B01D53/60
CPCY02A50/20
Inventor 王建英陈国刚孙涛略张丽喆张向京陶然卢赤杰张清洁赵风云
Owner MAISEN ENERGY TECH CO LTD