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Denitration agent and preparation method thereof

A denitrification agent and nitrate technology, applied in separation methods, chemical instruments and methods, and dispersed particle separation, etc., can solve problems such as abnormal operation, failure to adapt to production needs, large fluctuations in combustion furnace operation, etc., and achieve the goal of reducing NOx concentration Effect

Inactive Publication Date: 2016-03-30
山东骏飞环保科技有限公司 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The applicant found through research that the existing denitrification agents mainly have the following problems: First, the existing denitrification agents can only reduce the NOx in the regeneration flue gas to 200mg / Nm 3 Left and right, under the increasingly stringent environmental protection requirements, it can no longer meet the production needs
Secondly, the existing denitration agents almost consume carbon monoxide while consuming NOx, which makes the operation of the subsequent combustion furnace fluctuate greatly or even fail to operate normally.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Embodiments 1 to 5 are specific implementations of a denitration agent of the present invention and its preparation method, wherein embodiment 1 is the best embodiment. The various metal nitrates added in the raw materials in Examples 1 to 5 are commercially available metal nitrates with water of crystallization. The activated alumina used in Examples 1 to 5 is the activated alumina produced by Shandong Aluminum Company, with a specific surface area of ​​100 to 260m 2 / g, particle size 40~105μm≥60%, pore volume 0.15~0.3ml / g, bulk density 0.85g / ml. The chloroplatinic acid used in Examples 1 to 5 was obtained by dissolving the simple substance of platinum in aqua regia and drying it, and the gold compound used was obtained by dissolving the simple substance of gold in aqua regia and drying it.

[0032] Example 1

[0033] In this embodiment, the component distribution ratio is by weight, 75 parts of activated alumina, 5 parts of chloroplatinic acid, 5 parts of neodymium ...

Embodiment 2

[0039] In this embodiment, the component distribution ratio is by weight, 60 parts of activated alumina, 10 parts of chloroplatinic acid, 5 parts of cerium chloride, 15 parts of copper nitrate, 10 parts of barium nitrate, and 30 parts of distilled water;

[0040] The preparation method of the present embodiment is as follows:

[0041] a) Prepare chloroplatinic acid, cerium chloride, copper nitrate, barium nitrate, and distilled water into a solution in proportion by weight, and stir evenly;

[0042] b) Put the activated alumina in the mixing tank, add the solution prepared in step a) into the mixing tank, and stir evenly to obtain a semi-finished product;

[0043] c) Place the semi-finished product in a drying furnace for drying, dry at 100°C for 5 hours, and roast at 750°C for 1 hour to obtain the finished product.

Embodiment 3

[0045] In this embodiment, the component distribution ratio is by weight, 70 parts of activated alumina, 5 parts of gold compounds, 5 parts of lanthanum chloride, 15 parts of cobalt nitrate, 5 parts of magnesium nitrate, 30 parts of distilled water;

[0046] The preparation method of the present embodiment is as follows:

[0047] a) A gold compound, lanthanum chloride, cobalt nitrate, magnesium nitrate, and distilled water are prepared into a solution in proportion by weight, and stirred evenly;

[0048] b) Put the activated alumina in the mixing tank, add the solution prepared in step a) into the mixing tank, and stir evenly to obtain a semi-finished product;

[0049] c) Place the semi-finished product in a drying furnace for drying, dry at 150°C for 5 hours, and roast at 750°C for 1 hour to obtain the finished product.

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Abstract

The invention provides a denitration agent and a preparation method thereof, and belongs to the technical field of catalytic cracking auxiliaries. The denitration agent is prepared from 60-85 parts of activated aluminum oxide, 1-10 parts of compound of a noble metal element, 1-5 parts of chloride of rear earth elements, 1-15 parts of nitrate of transition metal elements, 1-10 parts of nitrate of alkaline earth metal elements and 20-200 parts of water. The denitration agent can effectively decrease the concentration of NOx in flue gas, and meanwhile carbon monoxide in the flue gas is not consumed in the working process.

Description

technical field [0001] A denitration agent and a preparation method thereof belong to the technical field of catalytic cracking additives. Background technique [0002] The catalyst circulates between the reactor and the regenerator. Usually, when leaving the reactor, the catalyst contains about 3-10 wt% coke, and the deposited coke must be burnt with oxygen in the air in the regenerator to restore catalytic activity. The coke deposited on the catalyst is mainly a reaction condensate, and its main components are carbon and hydrogen. When the cracking raw material contains sulfur and nitrogen, the coke also contains sulfur and nitrogen. The carbon-deposited catalyst is regenerated with oxygen to generate CO 2 , CO and H 2 O, regeneration flue gas also contains SOx and NOx. With the development of society, more and more attention has been paid to environmental protection issues, which requires that the nitrogen oxides (NOx for short) in the regeneration flue gas should not ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/81B01D53/56
CPCB01D53/81B01D53/565
Inventor 刘奎文李国栋
Owner 山东骏飞环保科技有限公司
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