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Catalytic cracking oxygen-lean regeneration denitrification agent and preparation method thereof

A technology of catalytic cracking and denitration agent, applied in chemical instruments and methods, physical/chemical process catalysts, separation methods, etc., can solve the problems of corroding external sewage, salt formation in flue equipment, escape and damage to the atmosphere, etc., to achieve safety High, simple and convenient operation, significant economic benefits

Active Publication Date: 2022-07-22
山东骏飞环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] (1) Selective non-catalytic reduction (SNCR) process is difficult to ensure the reaction temperature and residence time in actual operation, resulting in unstable and low denitrification rate. The average denitrification rate is 30% to 50%, resulting in the process The technology is limited in a wide range and is difficult to popularize
[0007] (2) low temperature O 3 oxidation (LoTOx) process due to the presence of O in operation 3 The disadvantages of escaping and destroying the atmosphere and extremely high energy consumption; at the same time, the biggest disadvantage of this process has not been fundamentally solved from NO x Pollution of the environment, just NO x From air pollution to water pollution
[0008] (3) Selective Catalytic Reduction (SCR) process technology has a high denitrification rate, an average of over 80%, but the investment cost and construction cost are relatively high, and the reducing agent (liquid ammonia) is consumed during operation, and NH is common. 3 Escape, flue equipment salt accumulation and serious corrosion, and the ammonia nitrogen index of the effluent sewage exceeding the standard
However, due to the NO in the oxygen-poor regeneration process x The formation mechanism is completely different from oxygen-enriched regeneration, so there are basically no denitrification agent products or technologies suitable for reducing catalytic oxygen-lean regeneration in refineries

Method used

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  • Catalytic cracking oxygen-lean regeneration denitrification agent and preparation method thereof
  • Catalytic cracking oxygen-lean regeneration denitrification agent and preparation method thereof
  • Catalytic cracking oxygen-lean regeneration denitrification agent and preparation method thereof

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Effect test

Embodiment 1

[0052] The raw material components of this implementation are as follows:

[0053]

[0054] The preparation method is as follows:

[0055] Take 15 parts of ammonium dihydrogen phosphate to prepare an aqueous solution, add 855 parts of active γ-Al 2 O 3 , stirred, and immersed for 14 hours to obtain an intermediate; the intermediate was dried at 120 °C for 4 hours, and calcined at 550 °C for 6 hours to obtain modified active γ-Al 2 O 3 ;

[0056] Take 30 parts of silver nitrate, 80 parts of cerium nitrite, 10 parts of ferrous nitrate, 25 parts of sulfonated cobalt phthalocyanine, and 5 parts of copper nitrate and chemical water to prepare a solution and stir it evenly; all the obtained metal solutions are added to the modified solution. Active γ-Al after 2 O 3 The intermediate product is stirred evenly, soaked for 24 hours, dried at 120°C for 6 hours, and calcined at 700°C for 4 hours to obtain the final catalytic cracking oxygen-depleted regeneration denitration agent...

Embodiment 2

[0069] The raw material components of this implementation are as follows:

[0070]

[0071] The preparation method is as follows:

[0072] Take 25 parts of ammonium phosphate to prepare an aqueous solution, add 790 parts of active γ-Al 2 O 3 , stirred, and immersed for 24 hours to obtain an intermediate; the intermediate was dried at 160 °C for 3 hours, and calcined at 600 °C for 3 hours to obtain modified active γ-Al 2 O 3 ;

[0073] Get 5 parts of chloroiridic acid, 20 parts of chloropalladic acid, 60 parts of cerium nitrate, 40 parts of lanthanum nitrate, 5 parts of ferrous nitrate, 5 parts of copper nitrate, 50 parts of antimony tartrate and chemical water to configure into a solution and stir evenly; All the obtained metal solutions were added to the modified active γ-Al 2 O 3 The intermediate product is stirred evenly, soaked for 32 hours, dried at 140°C for 6 hours, and calcined at 720°C for 4 hours to obtain the final catalytic cracking oxygen-depleted regener...

Embodiment 3

[0088] The raw material components of this implementation are as follows:

[0089]

[0090]

[0091] The preparation method is as follows:

[0092] Take 30 parts of diammonium hydrogen phosphate to prepare an aqueous solution, add 820 parts of active γ-Al 2 O 3 , stirred, and immersed for 18 h to obtain an intermediate; the intermediate was dried at 140 °C for 4 hours, and calcined at 560 °C for 4 hours to obtain modified active γ-Al 2 O 3 ;

[0093] Get 5 parts of chloroplatinic acid, 15 parts of chloropalladic acid, 50 parts of cerium nitrate, 30 parts of lutetium nitrate, 5 parts of vanadium sol, 5 parts of copper nitrate, 40 parts of sulfonated phthalocyanine respectively and chemical water to configure into solution and stir; All metal solutions were added to the modified active γ-Al 2 O 3 The intermediate product is stirred evenly, soaked for 30 hours, dried at 180°C for 5 hours, and calcined at 750°C for 3 hours to obtain the final catalytic cracking oxygen-...

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Abstract

The invention relates to a catalytic cracking oxygen-lean regeneration denitration agent and a preparation method thereof, belonging to the field of catalytic cracking auxiliary agents. The catalytic cracking oxygen-lean regeneration denitrification agent of the present invention includes a carrier and an active component, and the carrier is active γ-Al 2 O 3 , the active components are noble metal compounds, metal compounds and rare earth element compounds; the catalytic cracking oxygen-lean regeneration denitrification agent includes the following raw materials by mass percentage: active γ-Al 2 O 3 70-90%, noble metal compound 1.5-5%, rare earth element compound 4-10%, metal compound 3-10%, phosphate 1.5-5%. The catalytic cracking oxygen-lean regeneration denitrification agent of the invention has high denitration rate; the use process is simple and easy to operate, does not produce secondary pollution, the flue gas can meet the emission standard, the economic benefit is high, and the CO component in the regenerator is not consumed at all, The safety is high; meanwhile, the present invention also provides a preparation method.

Description

technical field [0001] The invention relates to a catalytic cracking oxygen-lean regeneration denitration agent and a preparation method thereof, belonging to the field of catalytic cracking auxiliary agents. Background technique [0002] Nitrogen oxides (NO x ) is one of the main air pollutants, it can form acid rain, destroy the atmosphere, and seriously endanger human health. Among them, the refinery, especially the catalytic cracking unit, emits NO into the atmosphere due to the heavy and degraded raw materials. x The proportion is increasing, accounting for about NO x 10% of total source, so research and control NO in FCC process x becomes more and more important. [0003] As early as the 1990s, developed countries in the world have made great technological progress in flue gas desulfurization and denitrification. For example, the United States, Germany, and Japan have basically completed the transformation of flue gas desulfurization and denitrification before 2000...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/86B01D53/96B01J27/185B01D53/56
CPCB01D53/8625B01D53/96B01J27/1856B01J27/1853B01D2251/2062
Inventor 杨大伟谭卫东
Owner 山东骏飞环保科技有限公司
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